Socket Weld and Threaded Fittings
Section 7
Socket Weld and Threaded
Fittings
This Section contains dimension and tolerance information
extracted from American and British specifications applicable
to socket weld and threaded fittings.
Subsections and topics
7-2
Pressure/Temperature Ratings - BS 3799
7-4
Socket Weld Fittings - ANSI/ASME B16.11/BS 3799
7-6
Threaded Fittings - ANSI/ASME B16.11/BS 3799
7-11
Plugs and Bushings - ANSI B16.11/BS 3799
7-13
Hexagonal and Round Nipples - BS 3799
7-14
Welding Bosses - BS 3799
7-15
Threaded Unions - BS 3799
7-16
Swage Nipples - BS 3799
7-18
Outlets
7-19 to 7-25
Low Pressure Threaded Fittings - General
7-26
Equal Elbows, Tees and Crosses - BS 1740
7-27
Sockets - BS 1740
7-31
Caps and Plugs - BS 1740
7-33
Hexagonal Bushes and Nipples - BS 1740
7-34
ASME/ANSI and BS Specifications
covered in this Section
Aalco
Tel. 01932 250100
Page
High Pressure Fittings - General
Page
ANSI/ASME B16.11-1991 - Forged Fittings,
Socket-welding and Threaded
7-2
BS 3799:1974 - Steel Pipe Fittings, Screwed and
Socket-welding for the Petroleum Industry
7-2
BS 1740:Part 1:1971 Wrought Steel Pipe Fittings
(screwed BSP thread)
7-26
Fax: 01932 250101
E-mail: [email protected]
7-1
Socket Weld and Threaded Fittings
High Pressure Fittings - General
This subsection summarises requirements for high pressure (HP) socket weld and
threaded fittings as defined in ASME/ANSI B16.11-1991 and BS 3799:1974. Dimensions
are reproduced in pages 7-6 to 7-25, including coverage of Outlet fittings that are also
used in high pressure applications.
Specifications
The specifications applicable to high pressure socket weld and threaded fittings are as follows:
❍
❍
ASME/ANSI B16.11-1991 - Forged fittings,
socket-welding and threaded.
BS 3799:1974 - Steel pipe fittings, screwed and
socket-welding for the petroleum industry. This
specification is substantially the same as B16.11.
A summary of the fittings, sizes and pressure
ratings (class designations) covered by B16.11
and BS 3799 is provided in the tables below. The
first table also shows the pipe weights defined as
compatible with the various classes of fitting.
Class designations in B16.11-1991 and BS 3799:1974
Pipe defined as normally used with the fittings2
B16.11-1991
BS 3799:1974
Socket Weld
Threaded
Socket Weld
Threaded
Schedule 80/XS
Schedule 80/XS
Schedule 160
Schedule 80
Schedule 803
Class Designation1
(lb)
2000
30003
6000
9000
Schedule 160
XXS
Schedule 1604
-
XXS
-
XXS
-
Notes
1 Class designations correspond to the maximum cold working pressure of fittings in pounds force per square inch.
2 The wall thicknesses quoted are not restrictive but do correlate for calculation of pressure ratings. Thicker or thinner pipe
may be used, but when thinner pipe is used its strength should govern the pressure rating.
3 Bore dimensions for Class 3000 lb socket welding fittings correspond to Schedule 40 pipe.
4 Bore dimensions for Class 6000 lb socket welding fittings correspond to Schedule 160 pipe.
6000 lb
9000 lb
2000 lb
3000 lb
6000 lb
3000 lb
6000 lb
3000 lb
6000 lb
Elbows, 90° and 45°
Crosses
Tees
Couplings and half couplings
Caps
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
Square, hexagonal and round plugs1
Hexagonal head bushings
BS 3799:1974
Socket Weld Threaded
3000 lb
Summary of coverage provided by B16.11-1991 and BS 3799:1974
B16.11-1991
Socket Weld
Threaded
Types of fittings
1
Flush bushings1
Hexagonal and round nipples
Unions
Welding bosses
Swage nipples2
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
Notes
1 Plugs and bushes are not designated by Class and may be used for ratings up to Class 6000 lb.
2 Swage nipples may be ordered in any combination of end preparation.
7-2
Aalco Tel. 01932 250100 Fax: 01932 250101
E-mail: [email protected]
Socket Weld and Threaded Fittings
High Pressure Fittings - General
Dimensions and Tolerances
❍
❍
Dimensions. See pages 7-6 to 7-25 for HP fitting
dimensions.
Size Designations for Reducing Fittings.
2
1
❍
3
3
1
1x2x3
where 1 is the
largest nominal size
Fitting bore and socket bore tolerances
2
4
1x2x3x4
where 1 and 3 are
the larger nominal sizes
Tolerances specified in ASME/ANSI B16.11 are
included in the dimension tables. BS 3799
tolerances are substantially the same. Additional
tolerances are as follows:
NPS
Tolerance
Concentricity of
bores
All
±0.8 mm
Alignment of axes
All
0.06 in
per 1 ft, or
1 in 200
Manufacture
❍
❍
ASME/ANSI B16.11-1991. ASME/ANSI stainless
steel socket weld or threaded fittings are most
commonly
manufactured
from
material
conforming to ASTM A182 (see page 4-6).
BS 3799:1974. Manufacturing requirements are
substantially the same as for B16.11. Stainless
steel grades specified are as indicated in the
pressure/temperature ratings table on page 7-4.
❍
❍
Marking should include (in priority order):
- Manufacturers name or trademark
- Material identification (in accordance with A 182,
- Class or pressure ratings (e.g. 3000 lb)
- Size
Markings may be omitted (least priority first from
above list) if fitting size or shape imposes limits.
Outlets. Socket weld and threaded outlets
comply with B16.11 requirements, although
B16.11 does not specifically cover outlets.
Pressure Ratings
❍
❍
General. The Class designation (e.g. 3000 lb) of
the high pressure fittings indicates the maximum
cold working pressure.
ASME/ANSI B16.11 Fittings. ASME/ANSI
B16.11 specifies the allowable pressure/
temperature rating to be that of seamless pipe of
the equivalent material and wall thickness.
Aalco Tel. 01932 250100
Fax: 01932 250101
❍
❍
BS 3799 Fittings. BS 3799 includes a table of
pressure/temperature rating. This is reproduced
on page 7-4.
Outlets. These fittings conform to the pressure
requirements of ASME/ANSI B16.11.
E-mail: [email protected]
7-3
7-4
WP304H
6000 lb
6000 lb
3000 lb
3000 lb
3000 lb
3000 lb
Aalco Tel. 01932 250100
207
206
203
200
198
196
194
192
188
183
174
165
155
147
141
135
129
123
117
111
105
3000 lb
207
207
207
206
203
200
198
196
194
192
188
183
174
165
155
147
141
135
129
123
117
111
105
207
206
203
200
198
196
194
192
188
183
174
165
155
147
141
135
129
123
117
111
105
147
147
414 147
411 147
406 147
401 147
396 142
392 137
388 126
384 115
377 110
366 106
349 102
331 98.5
311 95
294 92
282 89
270 86
258 83.5
246 81
234
223
211
-
207
207
207
206
203
200
198
196
194
192
188
183
174
165
155
147
141
135
129
123
117
111
105
E-mail: [email protected]
Pressure Rating, max, Bar
414
207 414
414
207 414
414 207 414 207 414
411 206 411 206 411
406 203 406 203 406
401 200 401 200 401
396 198 396 198 396
392 196 392 196 392
388 194 388 194 388
384 192 384 192 384
377 188 377 188 377
366 183 366 183 366
349 174 349 174 349
331 165 331 165 331
311 155 311 155 311
294 147 294 147 294
282 141 282 141 282
270 135 270 135 270
258 129 258 129 258
246 123 246 123 246
234 117 234 117 234
223 111 223 111 223
211 105 211 105 211
Fax: 01932 250101
207
207
207
206
203
200
198
196
194
192
188
183
174
165
155
147
141
135
129
123
117
111
105
3000 lb
147
147
147
147
146
142
133
123
114
105
99.5
94
90
87.5
85
82.5
80.5
78.5
76.5
-
6000 lb
354
354
354 177 345
345 172 345
330 165 330
311 155 311
297 148 297
284 142 284
272 136 272
260 130 260
250 125 250
240 120 240
231 115 231
224 112 224
217 108 217
210 105 210
203 101 203
196 98 196
190 95 190
184 92 184
179 89.5 179
176 88 176
174 87 174
3000 lb
177
177
177
172
165
155
148
142
136
130
125
120
116
112
108
105
101
98
95
92
89.5
88
87
6000 lb
207
207
207
206
203
200
198
196
194
192
188
183
174
165
155
146
140
133
127
120
113
107
98
207
207
207
206
203
200
198
196
194
192
188
183
174
165
155
146
140
133
127
120
113
107
100
414
414
414
411
406
401
396
392
388
384
377
366
349
331
311
293
280
267
254
240
227
214
201
WP304L
6000 lb
3000 lb
414
414
414
411
406
401
396
392
388
384
377
366
349
331
311
293
280
267
254
240
227
214
196
WP321
6000 lb
6000 lb
414
414
414
411
406
401
396
392
388
384
377
366
349
331
311
294
282
270
258
246
234
223
211
WP321H
6000 lb
3000 lb
295
295
295
295
295
294
284
274
252
230
220
212
204
197
190
184
178
172
167
162
-
Stainless Steel Grades and Classes (lb)
WP347
WP347H
WP316
WP316H
6000 lb
3000 lb
414
411
406
401
396
392
388
384
377
366
349
331
311
294
282
270
258
246
234
223
211
WP316L
6000 lb
3000 lb
414
414
414
411
406
401
396
392
388
384
377
366
349
331
311
294
282
270
258
246
234
223
211
WP317
6000 lb
3000 lb
295
295
295
294
292
285
266
247
229
211
199
188
180
175
170
165
161
157
153
-
WP310
WP309
6000 lb
3000 lb
°C
-100/-50
-50/-30
-30/+40
50
75
100
125
150
175
200
225
250
275
300
325
350
375
400
425
450
475
500
525
Temp
6000 lb
WP304
Pressure/temperature ratings from BS 3799:1974
This subsection covers the pressure ratings for high pressure stainless steel socket weld and threaded fittings covered in BS 3799.
See page 7-3 for ANSI/ASME B16.11 pressure rating requirements.
Pressure/Temperature Ratings - BS 3799
Socket Weld and Threaded Fittings
3000 lb
3000 lb
3000 lb
99.5
94
88
71
48.7
33.8
23.3
16.6
12.8
10.2
8.2
99.5
94
88
71
48.7
33.8
23.3
16.6
12.8
10.2
8.2
Pressure Rating, max, Bar
199 99.5 199 99.5 199
188 94 188 94 188
176 88 176 89 178
142 71 142 79 158
97.4 48.7 97.4 66.5 133
67.6 33.8 67.6 53 106
46.6 23.3 46.6 41.3 82.7
33.2 16.6 33.2 29.8 59.6
25.7 12.8 25.7 22 44.1
20.5 10.2 20.5 17
34
16.4 8.2 16.4 12.5 25.1
99.5
94
89
79
66.5
53
41.3
29.8
22
17
12.5
Aalco Tel. 01932 250100
Fax: 01932 250101
-
99.5
94
89
79
66.5
53
41.3
29.8
22
17
12.5
E-mail: [email protected]
Notes
The pressure ratings assume stainless steel forging material manufactured as follows (ASTM A 182 equivalents are approximate):
WP304 = BS 1503 304S40 = A 182 F304
WP304L = BS 1503 304S30 = A 182 F304L
WP321 = BS 1503 321S40 = A 182 F321
WP316 = BS 1503 316S40 or S41 = A 182 F316
WP316L = BS 1503 316S30 or S31 = A 182 F316L
The pressure ratings assume stainless steel pipe manufactured as follows (ASTM A 312 equivalents are approximate):
WP304 = BS 3605 304S18 = A 312 TP304
WP304L = BS 3605 304S14 = A 312 TP304L
WP321 = BS 3605 321S18 = A 312 TP321
WP316 = BS 3605 316S18 = A 312 TP316
WP316L = BS 3605 316S14 = A 312 TP316L
99.5
94
88
71
48.7
33.8
23.3
16.6
12.8
10.2
8.2
3000 lb
-
3000 lb
85.5
80.5
69.5
55
43.8
32.9
25.2
19.3
15.1
11.7
8.7
3000 lb
85.5
80.5
69.5
55
43.8
32.9
25.2
19.3
15.1
11.7
8.7
6000 lb
85.5
73
60
47.5
37
28.9
23.7
18.9
14.5
11.2
9.3
171
146
120
95
74
57.8
47.5
37.9
29
22.4
18.6
93.5
87.5
80.5
69.5
58.5
47.6
36.3
26
18.3
13.1
9.3
187
175
161
139
117
95.2
72.6
52
36.7
26.2
18.6
6000 lb
3000 lb
199
188
178
158
133
106
82.7
59.6
44.1
34
25.1
WP304H
6000 lb
6000 lb
-
WP304L
6000 lb
3000 lb
199
188
178
158
133
106
82.7
59.6
44.1
34
25.1
WP321
6000 lb
6000 lb
199
188
176
142
97.4
67.6
46.6
33.2
25.7
20.5
16.4
WP321H
6000 lb
3000 lb
199
188
176
142
97.4
67.6
46.6
33.2
25.7
20.5
16.4
Stainless Steel Grades and Classes (lb)
WP347
WP347H
WP316
WP316H
6000 lb
3000 lb
-
WP316L
6000 lb
3000 lb
171
161
139
110
87.7
65.8
50.5
38.7
30.2
23.5
17.5
WP317
6000 lb
3000 lb
171
161
139
110
87.7
65.8
50.5
38.7
30.2
23.5
17.5
WP310
WP309
6000 lb
3000 lb
°C
550
575
600
625
650
675
700
725
750
775
800
Temp
6000 lb
WP304
Pressure/temperature ratings from BS 3799:1974 (Continued)
Pressure/Temperature Ratings - BS 3799
Socket Weld and Threaded Fittings
7-5
Socket Weld and Threaded Fittings
3000 lb Socket Weld Fittings ANSI B16.11/BS 3799
NPS
max/ave/min
Dimensions and tolerances (based on ASME/ANSI B16.11-1991 and BS 3799:1974)
Centre to Bottom of
Socket
90° Elbows,
45°
Tees, &
Elbows
Crosses
in
1/8
1/4
3/8
1/2
3/4
1
11/4
11/2
2
21 / 2
3
4
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
$
+0.03
0.44
-0.03
+0.03
0.44
-0.03
+0.06
0.53
-0.06
+0.06
0.62
-0.06
+0.06
0.75
-0.06
+0.08
0.88
-0.08
+0.08
1.06
-0.08
+0.08
1.25
-0.08
+0.08
1.50
-0.08
+0.10
1.62
-0.10
+0.10
2.25
-0.10
+0.10
2.62
-0.10
$
mm
in
12
10
12
10
15
+0.03
0.31
-0.03
+0.03
0.31
-0.03
+0.06
0.31
-0.06
+0.06
0.44
-0.06
+0.06
0.50
-0.06
+0.08
0.56
-0.08
+0.08
0.69
-0.08
+0.08
0.81
-0.08
+0.08
1.00
-0.08
+0.10
1.12
-0.10
+0.10
1.25
-0.10
+0.10
1.62
-0.10
12
17
14
21
18
24
20
29
25
34
30
40
36
44
39
60
55
69
64
Socket
Bore
Diameter
mm
in
9
0.440
%
Bore Diameter
of Fittings
mm
in
11.15
0.299
'
mm
7.6
-
-
-
-
-
7
9
0.420
0.575
10.65
14.60
0.239
0.394
6.1
10.0
-
-
-
-
-
7
9
0.555
0.710
14.10
18.05
0.334
0.523
8.5
13.3
-
-
-
-
-
6
13
0.690
0.875
17.55
22.20
0.463
0.652
11.8
16.6
-
-
-
-
-
10
14
0.855
1.085
21.70
27.55
0.592
0.854
15.0
21.7
-
-
-
-
-
11
16
1.065
1.350
27.05
34.30
0.794
1.079
20.2
27.4
-
-
-
-
-
12
19
1.330
1.695
33.80
43.05
1.019
1.410
25.9
35.8
-
-
-
-
-
15
23
1.675
1.935
42.55
49.15
1.350
1.640
34.3
41.7
-
-
-
-
-
19
27
1.915
2.426
48.65
61.60
1.580
2.097
40.1
53.5
-
-
-
-
-
23
31
2.406
2.931
61.10
74.45
2.037
2.529
51.7
64.2
-
-
-
-
-
27
34
2.906
3.560
73.80
90.40
2.409
3.128
61.2
79.5
-
-
-
-
-
29
44
3.535
4.570
89.30
116.05
3.008
4.086
46.4
103.8
-
-
-
-
-
39
4.545
115.45
3.966
100.7
Socket
Wall
Thickness
in
-
&
mm
-
Depth
of
Socket
Body
Wall
in
-
*
mm
-
in
-
-
mm
-
0.125
0.125
3.20
3.20
0.095 2.40 0.38
10
0.149
0.130
3.80
3.30
0.119
3.00 0.38
10
0.158
0.138
4.00
3.50
0.126 3.20 0.38
10
0.184
0.161
4.65
4.10
0.147 3.75 0.38
10
0.193
0.168
4.90
4.25
0.154 3.90 0.50
13
0.224
0.196
5.70
5.00
0.179 4.55 0.50
13
0.239
0.208
6.05
5.30
0.191 4.85 0.50
13
0.250
0.218
6.35
5.55
0.200 5.10 0.50
13
0.273
0.238
6.95
6.05
0.218 5.55 0.62
16
0.345
0.302
8.75
7.65
0.276 7.00 0.62
16
0.375
0.327
9.50
8.30
0.300 7.60 0.62
16
0.421
0.368
10.70
9.35 0.337 8.55 0.75
19
-
-
-
-
-
-
Notes
Average socket wall thickness C around periphery shall not be less than the listed values. Minimum values are permitted
in localised areas.
Dimensions B and J are the same for Class 3000, 6000 and 9000 lb fittings.
Dimensions and tolerances shown are as specified in ASME/ANSI B16.11-1991. These agree substantially with BS
3799:1974. Exceptions are indicated in the following note.
BS 3799 does not cover NPS 4.
7-6
Aalco Tel. 01932 250100 Fax: 01932 250101
E-mail: [email protected]
Socket Weld and Threaded Fittings
3000 lb Socket Weld Fittings ANSI B16.11/BS 3799
NPS
1
1
3
1
3
/8
/4
/8
/2
/4
1
11/4
11/2
2
21/2
3
4
max/ave/min
Dimensions and tolerances (based on ASME/ANSI B16.11-1991 and BS 3799:1974)
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
Socket
Bore
Diameter
in
%
Bore Diameter
of Fittings
'
mm
in
mm
0.440
11.15
0.299
7.6
-
-
-
-
0.420
0.575
10.65
14.60
0.239
0.394
6.1
10.0
-
-
-
-
0.555
0.710
14.10
18.05
0.334
0.523
8.5
13.3
-
-
-
-
0.690
0.875
17.55
22.20
0.463
0.652
11.8
16.6
-
-
-
-
0.855
1.085
21.70
27.55
0.592
0.854
15.0
21.7
-
-
-
-
1.065
1.350
27.05
34.30
0.794
1.079
20.2
27.4
-
-
-
-
1.330
1.695
33.80
43.05
1.019
1.410
25.9
35.8
-
-
-
-
1.675
1.935
42.55
49.15
1.350
1.640
34.3
41.7
-
-
-
-
1.915
2.426
48.65
61.60
1.580
2.097
40.1
53.5
-
-
-
-
2.406
2.931
61.10
74.45
2.037
2.529
51.7
64.2
-
-
-
-
2.906
3.560
73.80
90.40
2.409
3.128
61.2
79.5
-
-
-
-
3.535
4.570
89.30
116.05
3.008
4.086
46.4
103.8
-
-
-
-
4.545
115.45
3.966
100.7
Socket
Wall
Thickness
in
-
&
Couplings
-
(
mm
-
in
-
0.125
0.125
0.149
0.130
0.158
0.138
0.184
0.161
3.20
3.20
3.80
3.30
4.00
3.50
4.65
4.10
0.38
10
-
-
0.38
10
-
-
0.38
10
-
-
0.38
10
-
-
0.193
0.168
4.90
4.25
-
-
0.50
13
-
-
0.224
0.196
5.70
5.00
-
-
0.50
13
-
-
0.239
0.208
0.250
0.218
6.05
5.30
6.35
5.55
-
-
0.50
13
-
-
0.50
13
-
-
0.62
16
-
-
0.62
16
-
-
0.62
16
-
-
0.75
19
0.273
0.238
0.345
0.302
0.375
0.327
0.421
0.368
6.95
6.05
8.75
7.65
9.50
8.30
10.70
9.35
Laying Lengths
Half
Couplings
Depth
of
Socket
)
mm
in
mm
in
mm
+0.06
8
+0.03 17
0.25
-0.06
+0.06
0.25
-0.06
+0.12
0.25
-0.12
+0.12
0.38
-0.12
+0.12
0.38
-0.12
+0.16
0.50
-0.16
+0.16
0.50
-0.16
+0.16
0.50
-0.16
+0.16
0.75
-0.16
+0.20
0.75
-0.20
+0.20
0.75
-0.20
+0.20
0.75
-0.20
5
8
5
9
3
13
6
13
6
17
9
17
9
17
9
23
15
24
14
24
14
24
14
0.62
-0.03
+0.03
0.62
-0.03
+0.06
0.69
-0.06
+0.06
0.88
-0.06
+0.06
0.94
-0.06
+0.08
1.12
-0.08
+0.08
1.19
-0.08
+0.08
1.25
-0.08
+0.08
1.62
-0.08
+0.10
1.69
-0.10
+0.10
1.75
-0.10
+0.10
1.88
-0.10
15
17
15
19
16
24
21
25
22
31
27
32
28
34
30
43
39
45
40
47
42
50
45
Cap End
Wall
Thickness
in
0.19
0.19
0.19
0.25
0.25
0.38
0.38
0.44
0.50
0.62
.
mm
41
5.0
71
5.0
71
5.0
81
6.5
101
6.5
111
9.5
131
9.5
141
11.0
181
12.5
211
16.0
-
-
0.75
241
19.0
-
-
0.88
22.0
Notes
Average socket wall thickness C around periphery shall not be less than the listed values. Minimum values are permitted
in localised areas.
Dimensions B, J, E and F are the same for Class 3000, 6000 and 9000 lb fittings.
Dimensions and tolerances shown are as specified in ASME/ANSI B16.11-1991. These agree substantially with
BS 3799:1974. Exceptions are indicated in the following notes.
BS 3799 does not cover NPS 4.
1 These values for K are BS 3799 minimum values, quoted because they differ from the ASME/ANSI B16.11 values.
Aalco Tel. 01932 250100
Fax: 01932 250101
E-mail: [email protected]
7-7
Socket Weld and Threaded Fittings
6000 lb Socket Weld Fittings ANSI B16.11/BS 3799
NPS
max/ave/min
Dimensions and tolerances (based on ASME/ANSI B16.11-1991 and BS 3799:1974)
Centre to Bottom of
Socket
90° Elbows,
45°
Tees, &
Elbows
Crosses
in
1/8
1/4
3/8
1/2
3/4
1
11/4
11/2
2
21 / 2
3
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
$
+0.03
0.44
-0.03
+0.03
0.53
-0.03
+0.06
0.62
-0.06
+0.06
0.75
-0.06
+0.06
0.88
-0.06
+0.08
1.06
-0.08
+0.08
1.25
-0.08
+0.08
1.50
-0.08
+0.08
1.62
-0.08
-
mm
12
10
17
13
17
14
21
18
24
21
29
25
34
30
40
36
43
39
+2.5
571
-2.5
+2.5
641
-2.5
in
$
mm
Socket
Bore
Diameter
in
+0.03
9
0.440
0.31
-0.03
7
0.420
+0.03
9
0.575
0.31
-0.03
7
0.555
+0.06 13 0.710
0.44
-0.06
10 0.690
+0.06 14 0.875
0.50
-0.06
11 0.855
+0.06 16 1.085
0.56
-0.06
13 1.065
+0.08 19 1.350
0.69
-0.08
15 1.330
+0.08 23 1.695
0.81
-0.08
19 1.675
+0.08 27 1.935
1.00
-0.08
23 1.915
+0.08 31 2.426
1.12
-0.08
27 2.406
+2.5 2.931
321
-2.5 2.906
+2.5 3560
411
-2.5 3.535
%
Bore Diameter
of Fittings
mm
in
11.15
0.189
'
in
4.8
0.156
0.135
0.181
0.158
0.198
0.172
3.95
3.45
4.60
4.00
5.05
4.35
0.235
0.204
0.274
0.238
0.312
0.273
0.312
0.273
0.315
0.307
0.430
0.374
-
-
-
0.126
0.280
3.2
7.1
-
-
-
14.10
18.05
0.220
0.389
5.6
9.9
-
-
-
17.55
22.20
0.329
0.494
8.4
12.5
-
-
-
21.70
27.55
0.434
0.642
11.0
16.3
-
-
-
27.05
34.30
33.80
43.05
42.55
49.15
0.582
0.845
0.785
1.190
1.130
1.368
1.308
1.717
1.657
14.8
21.5
19.9
30.2
28.7
34.7
33.2
43.6
42.1
+0.8
54.01
-0.8
+0.8
67.01
-0.8
73.80
90.40
89.30
-
&
mm
10.65
14.60
48.65
61.60
61.10
74.45
Socket
Wall
Thickness
-
-
mm
Depth
of
Socket
Body
Wall
in
-
*
mm
-
in
-
-
mm
-
0.124 3.15 0.38
10
0.145 3.70 0.38
10
0.158 4.00 0.38
10
5.95
5.20
0.188 4.80 0.38
-
-
-
10
6.95
6.05
7.90
6.95
7.90
6.95
8.90
7.80
10.90
9.50
+0.4
7.71
-0.0
+0.4
8.31
-0.0
0.219
0.250
0.250
0.281
0.344
0.276
0.300
5.55
6.35
6.35
7.15
8.75
7.00
7.60
0.50
0.50
0.50
0.50
0.62
0.62
0.62
13
13
13
13
16
16
16
-
-
-
-
-
Notes
Average socket wall thickness C around periphery shall not be less than the listed values. Minimum values are permitted
in localised areas.
Dimensions B and J are the same for Class 3000, 6000 and 9000 lb fittings.
Dimensions and tolerances shown are as specified in ASME/ANSI B16.11-1991. These agree substantially with
BS 3799:1974. Exceptions are indicated in the following notes.
BS 3799 does not cover NPS 1/8, 1/4, 3/8 or 4. BS 3799 dimensions and tolerances are shown in italics.
1 BS 3799 covers elbows, tees and crosses at NPS 21/2 and 3 (not covered by ASME/ANSI B16.11).
7-8
Aalco Tel. 01932 250100 Fax: 01932 250101
E-mail: [email protected]
Socket Weld and Threaded Fittings
6000 lb Socket Weld Fittings ANSI B16.11/BS 3799
Dimensions and tolerances (based on ASME/ANSI B16.11-1991 and BS 3799:1974)
1/ 8
1/ 4
3/ 8
1/ 2
3/ 4
1
11/4
11/2
2
21/2
3
4
max/ave/min
NPS
Socket
Bore
Diameter
in
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
0.440
0.420
0.575
0.555
0.710
0.690
0.875
0.855
1.085
1.065
1.350
1.330
1.695
1.675
1.935
1.915
2.426
2.406
2.931
2.906
3560
3.535
4.570
4.545
%
Bore Diameter
of Fittings
mm
in
11.15
10.65
14.60
14.10
18.05
17.55
22.20
21.70
27.55
27.05
34.30
33.80
43.05
42.55
49.15
48.65
61.60
61.10
74.45
73.80
90.40
89.30
116.05
115.45
0.189
0.126
0.280
0.220
0.389
0.329
0.494
0.434
0.642
0.582
0.845
0.785
1.190
1.130
1.368
1.308
1.717
1.657
-
'
Socket
Wall
Thickness
mm
in
4.8
3.2
7.1
5.6
9.9
8.4
12.5
11.0
16.3
14.8
21.5
19.9
30.2
28.7
34.7
33.2
43.6
42.1
0.156
0.135
0.181
0.158
0.198
0.172
0.235
0.204
0.274
0.238
0.312
0.273
0.312
0.273
0.315
0.307
0.430
0.374
-
-
&
Depth
of
Socket
mm
in
3.95
3.45
4.60
4.00
5.05
4.35
5.95
5.20
6.95
6.05
7.90
6.95
7.90
6.95
8.90
7.80
10.90
9.50
+0.4
10.4
-0.0
+0.4
12.2
-0.0
-
0.38
0.38
0.38
0.38
0.50
0.50
0.50
0.50
0.62
0.62
0.62
0.75
-
Laying Lengths
Half
Couplings Couplings
(
mm
in
10
10
10
10
13
13
13
13
16
16
16
19
+0.06
0.25
-0.06
+0.06
0.25
-0.06
+0.12
0.25
-0.12
+0.12
0.38
-0.12
+0.12
0.38
-0.12
+0.16
0.50
-0.16
+0.16
0.50
-0.16
+0.16
0.50
-0.16
+0.16
0.75
-0.16
+0.20
0.75
-0.20
+0.20
0.75
-0.20
-
)
mm
in
8
5
8
5
9
3
13
6
13
6
17
9
17
9
17
9
23
15
24
14
24
14
-
+0.03
0.62
-0.03
+0.03
0.62
-0.03
+0.06
0.69
-0.06
+0.06
0.88
-0.06
+0.06
0.94
-0.06
+0.08
1.12
-0.08
+0.08
1.19
-0.08
+0.08
1.25
-0.08
+0.08
1.62
-0.08
+0.10
1.69
-0.10
+0.10
1.75
-0.10
-
Cap End
Wall
Thickness
mm
in
17
15
17
15
19
16
24
21
25
22
31
27
32
28
34
30
43
39
45
40
47
42
-
0.25
0.25
0.25
0.31
0.31
0.44
0.44
0.50
0.62
0.75
0.88
1.12
.
mm
6.5
6.5
6.5
5.21
8.0
131
8.0
141
11.0
181
11.0
191
12.5
241
16.0
291
19.0
341
22.0
28.5
Notes
Average socket wall thickness C around periphery shall not be less than the listed values. Minimum values are permitted
in localised areas. (Dimension C is not specified in ASME/ANSI B16.11 for Class 6000 lb Caps larger than NPS 2.)
Dimensions B, J, E and F are the same for Class 3000, 6000 and 9000 lb fittings.
Dimensions and tolerances shown are as specified in ASME/ANSI B16.11-1991. These agree substantially with
BS 3799:1974. Exceptions are indicated in the following notes.
BS 3799 does not cover NPS 1/8, 1/4, 3/8 or 4. BS 3799 dimensions and tolerances are shown in italics.
1 These values for K are BS 3799 minimum values, quoted because they differ from the ASME/ANSI B16.11 values.
Aalco Tel. 01932 250100
Fax: 01932 250101
E-mail: [email protected]
7-9
Cross
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
max
ave
min
$
in
+0.06
1.00
-0.06
+0.06
1.12
-0.06
+0.08
1.25
-0.08
+0.08
1.38
-0.08
+0.08
1.50
-0.08
+0.08
2.12
-0.08
mm
27
24
30
27
34
30
37
33
40
36
56
52
$
in
mm
in
+0.06 17 0.875
0.62
-0.06 14 0.855
+0.06 21 1.085
0.75
-0.06 17 1.065
+0.08 23 1.350
0.81
-0.08 19 1.330
+0.08 24 1.695
0.88
-0.08 20 1.675
+0.08 28 1.935
1.00
-0.08 23 1.915
+0.08 31 2.426
1.12
-0.08 26 2.406
%
-
1.473
61.10
1.070
1.533
48.65
61.60
-
-
0.866
1.130
42.55
49.15
-
-
0.569
0.926
33.80
43.05
-
-
0.404
0.629
27.05
34.30
-
-
0.222
0.464
21.70
27.55
-
-
in
0.282
-
mm
22.20
'
37.4
-
27.2
38.9
-
22.0
28.7
-
14.5
23.5
-
10.3
16.0
-
5.6
11.8
-
mm
7.2
in
0.368
0.322
0.385
0.337
0.448
0.392
0.478
0.418
0.500
0.438
0.545
0.477
&
mm
9.35
8.20
9.80
8.55
11.40
9.95
12.15
10.60
12.70
11.15
13.85
12.15
-
0.436 11.05
-
0.400 10.15
9.70
-
-
0.382
9.10
-
-
0.358
7.80
-
-
0.308
7.45
-
mm
-
*
0.294
-
in
Body Wall
45° Elbow
0.62
-
0.50
-
0.50
-
0.50
-
0.50
-
0.38
-
in
-
16
-
13
-
13
-
13
-
13
-
10
-
mm
Depth of Socket
Coupling
(
in
+0.12
0.38
-0.12
+0.12
0.38
-0.12
+0.16
0.50
-0.16
+0.16
0.50
-0.16
+0.16
0.50
-0.16
+0.16
0.75
-0.16
mm
13
6
13
6
17
9
17
9
17
9
23
15
Couplings
Aalco Tel. 01932 250100
Fax: 01932 250101
Cap
E-mail: [email protected]
)
in
+0.06
0.88
-0.06
+0.06
0.94
-0.06
+0.08
1.12
-0.08
+0.08
1.19
-0.08
+0.08
1.25
-0.08
+0.08
1.62
-0.08
mm
24
21
25
22
31
27
32
28
34
30
43
39
19.0
0.75
16.0
-
14.0
-
14.0
-
12.5
-
11.0
-
mm
-
.
-
0.62
-
0.56
-
0.56
-
0.50
-
0.44
-
in
Cap End
Half Couplings Wall Thickness
Laying Lengths
Half-Coupling
Note
BS 3799 does not specify Class 9000 lb socket weld fittings. Otherwise, notes for Class 6000 lb fittings on pages 7-8 and 7-9 also apply to this table.
2
11/2
11/4
1
3/ 4
1/ 2
NPS
Tee
Centre to Bottom of Socket
Socket
Bore Diameter
Socket
90° Elbows,
of Fittings
Wall Thickness
Tees, &
45° Elbows Bore Diameter
Crosses
Dimensions and tolerances (based on ASME/ANSI B16.11-1991)
max/ave/min
7-10
90° Elbow
9000 lb Socket Weld Fittings - ANSI B16.11
Socket Weld and Threaded Fittings
Tee
3000 lb
in mm
0.81 21
0.97 25
1.12 29
1.31 33
1.50 38
1.75 44
2.00 51
2.38 60
2.50 64
3.25 83
3.75 95
4.50 114
6000 lb
in mm
0.97 25
1.12 29
1.31 33
1.50 38
1.75 44
2.00 51
2.38 60
2.50 64
3.25 83
3.75 95
4.19 106
4.50 114
2000 lb
in mm
0.69 17
0.69 17
0.75 19
0.88 22
1.00 25
1.12 29
1.31 33
1.38 35
1.69 43
2.06 52
2.50 64
3.12 79
3000 lb
in mm
0.69 17
0.75 19
0.88 22
1.00 25
1.12 29
1.31 33
1.38 35
1.69 43
1.72 45
2.06 52
2.50 64
3.12 79
6000 lb
in mm
0.75 19
0.88 22
1.00 25
1.12 29
1.31 33
1.38 35
1.69 43
1.72 44
2.06 52
2.50 64
3.12 79
3.12 79
&
$
2000 lb
in mm
0.81 21
0.81 21
0.97 25
1.12 29
1.31 33
1.50 38
1.75 44
2.00 51
2.38 60
3.00 76
3.38 86
4.19 106
Centre to End 45°
Centre to End
2000 lb
in mm
0.88 22
0.88 22
1.00 25
1.31 33
1.50 38
1.81 46
2.19 56
2.44 62
2.97 75
3.62 92
4.31 110
5.75 146
3000 lb
in mm
0.88 22
1.00 25
1.31 33
1.50 38
1.81 46
2.19 56
2.44 62
2.97 75
3.31 84
4.00 102
4.75 121
6.00 152
+
6000 lb
in mm
1.00 25
1.31 33
1.50 38
1.81 46
2.19 56
2.44 62
2.97 75
3.31 84
4.00 102
4.75 121
5.75 146
6.00 152
OD of Band, min
Cross
2000 lb
in
mm
0.125 3.0
0.125 3.0
0.125 3.0
0.125 3.0
0.125 3.0
0.145 3.5
0.153 4.0
0.158 4.0
0.168 4.5
0.221 5.5
0.236 6.0
0.258 6.5
3000 lb
in
mm
0.125 3.0
0.130 3.5
0.138 3.5
0.161 4.0
0.170 4.5
0.196 5.0
0.208 5.5
0.219 5.5
0.281 7.0
0.301 7.5
0.348 9.0
0.440 11.0
*
6000 lb
in
mm
0.250 6.5
0.260 6.5
0.275 7.0
0.321 8.0
0.336 8.5
0.391 10.0
0.417 10.5
0.436 11.0
0.476 12.0
0.602 15.5
0.655 16.5
0.735 18.5
Wall Thickness, min
45° Elbow
in
0.25
0.32
0.36
0.43
0.50
0.58
0.67
0.70
0.75
0.93
1.02
1.09
mm
6.5
8.0
9.0
11.0
12.5
14.5
17.0
18.0
19.0
23.5
26.0
27.5
%
Aalco Tel. 01932 250100
Fax: 01932 250101
E-mail: [email protected]
in
0.2639
0.4018
0.4078
0.5337
0.5457
0.6828
0.7068
0.7235
0.7565
1.138
1.200
1.300
/
mm
6.5
10.0
10.5
13.5
14.0
17.5
18.0
18.5
19.0
29.0
30.5
33.0
Length of Thread, min.
Note
Dimensions and tolerances shown are as specified in ASME/ANSI B16.11-1991. These agree substantially with BS 3799:1974. Exceptions are indicated in the following notes.
BS 3799 does not cover any Class 2000 lb fittings, and Class 6000 lb fittings with NPS <1/2.
BS 3799 dimensions G and L2 vary slightly from the ANSI values quoted. Dimension B is not specified in BS 3799.
Dimension B is the length of perfect thread. L2 is the effective length of thread based on ANSI/ASME B1.20.1 (NTP), see page 10-11.
1
11/4
11/2
2
21 / 2
3
4
3/4
1/2
3/8
1/4
1/8
NPS
Dimensions and tolerances (based on ASME/ANSI B16.11-1991 and BS 3799:1974)
90° Elbow
2000 lb, 3000 lb and 6000 lb Threaded Fittings - ANSI B16.11/BS 3799
Socket Weld and Threaded Fittings
7-11
1.06
1.06
1.31
1.50
1.69
1.81
1.88
2.00
2.50
2.69
2.94
27
27
33
38
43
46
48
51
64
68
75
3000 lb
in
mm
0.62
16
0.75
19
0.88
22
1.12
29
1.38
35
1.75
44
2.25
57
2.50
64
3.00
76
3.62
92
4.25
108
5.50
140
'
OD
3000 lb
in
mm
0.19
5.0
0.19
5.0
0.19
5.0
0.25
6.5
0.25
6.5
0.38
9.5
0.38
9.5
0.44
11.0
0.50
12.5
0.62
16.0
0.75
19.0
0.88
22.0
*
0.25
0.25
0.31
0.31
0.44
0.44
0.50
0.62
0.75
0.88
1.12
6.5
6.5
8.0
8.0
11.0
11.0
12.5
16.0
19.0
22.0
28.5
6000 lb
in
mm
End Wall Thickness
Cap
in
0.25
0.32
0.36
0.43
0.50
0.58
0.67
0.70
0.75
0.93
1.02
1.09
%
mm
6.5
8.0
9.0
11.0
12.5
14.5
17.0
18.0
19.0
23.5
26.0
27.5
in
0.2639
0.4018
0.4078
0.5337
0.5457
0.6828
0.7068
0.7235
0.7565
1.138
1.200
1.300
Aalco Tel. 01932 250100
Fax: 01932 250101
E-mail: [email protected]
/
Length of Thread
Note
Dimensions and tolerances shown are as specified in ASME/ANSI B16.11-1991. These agree substantially with BS 3799:1974. Exceptions are indicated in the following notes.
BS 3799 does not cover Class 6000 lb caps with NPS >2.
BS 3799 dimensions G and L2 vary slightly from the ANSI values quoted. Dimension B is not specified in BS 3799.
Dimension B is the length of perfect thread. L2 is the effective length of thread based on ANSI/ASME B1.20.1 (NTP), see page 10-11.
1
11/4
11/2
2
21/2
3
4
3/ 4
1/ 2
3/ 8
1/ 4
1/ 8
6000 lb
in
mm
3
3000 lb
in
mm
0.75
19
1.00
25
1.00
25
1.25
32
1.44
37
1.62
41
1.75
44
1.75
44
1.88
48
2.38
60
2.56
65
2.69
68
:
3000 lb & 6000 lb
in
mm
1.25
32
1.38
35
1.50
38
1.88
48
2.00
51
2.38
60
2.62
67
3.12
79
3.38
86
3.62
92
4.25
108
4.75
121
End to End Caps
End to End Couplings
6000 lb
in
mm
0.88
22
1.00
25
1.25
32
1.50
38
1.75
44
2.25
57
2.50
64
3.00
76
3.62
92
4.25
108
5.00
127
6.25
159
Half Coupling
Dimensions and tolerances (based on ASME/ANSI B16.11-1991 and BS 3799:1974)
NPS
7-12
Coupling
3000 lb and 6000 lb Threaded Fittings - ANSI B16.11/BS 3799
mm
6.5
10.0
10.5
13.5
14.0
17.5
18.0
18.5
19.0
29.0
30.5
33.0
Socket Weld and Threaded Fittings
Hex Head Plug
Round Head Plug
in
0.38
0.44
0.50
0.56
0.62
0.75
0.81
0.81
0.88
1.06
1.12
1.25
$
mm
9.5
11.0
12.5
14.5
16.0
19.0
20.5
20.5
22.0
27.0
28.5
32.0
in
0.25
0.25
0.31
0.38
0.44
0.50
0.56
0.62
0.69
0.75
0.81
1.00
%
mm
6
6
8
10
11
13
14
16
17
19
21
25
in
0.28
0.38
0.44
0.56
0.62
0.81
0.94
1.12
1.31
1.50
1.69
2.50
&
mm
7.0
9.5
11.0
14.5
16.0
20.5
24.0
28.5
33.5
38.0
43.0
63.5
Square Head Plugs
Height of Square
Width Flats
min
min
in
0.41
0.53
0.69
0.84
1.06
1.31
1.69
1.91
2.38
2.88
3.50
4.50
(
mm
10
13
17
21
27
33
43
48
60
73
89
114
in
1.38
1.62
1.62
1.75
1.75
2.00
2.00
2.00
2.50
2.75
2.75
3.00
'
mm
35
41
41
44
44
51
51
51
64
70
70
76
Round Head Plugs
Diameter of Head
Length
nominal
min
in
0.44
0.62
0.69
0.88
1.06
1.38
1.75
2.00
2.50
3.00
3.50
4.62
Aalco Tel. 01932 250100
Fax: 01932 250101
mm
11.0
16.0
17.5
22.0
27.0
35.0
44.5
51.0
63.5
76.0
89.0
117.5
in
0.12
0.16
0.19
0.22
0.25
0.28
0.31
0.34
0.38
0.41
0.50
3
4
5
6
6
7
8
9
10
10
13
mm
%XVKLQJ*
3OXJ+
in
0.25
0.25
0.31
0.31
0.38
0.38
0.56
0.62
0.69
0.75
0.81
1.00
Hex Height, min
mm
6
6
8
8
10
10
14
16
17
19
21
25
Note
Hex bushings of one size
reduction should not be used
where they could be subject to
harmful loads and pressures
other than internal pressure.
Hex Plugs and Bushings
Flush Bushing
E-mail: [email protected]
)
Width Flats
nominal
Hexagonal Head
Bushing
Notes
Plugs and bushes are not designated by Class and may be used at ratings up to Class 6000 lb.
Dimensions and tolerances shown are as specified in ASME/ANSI B16.11-1991. These agree substantially with BS 3799:1974.
1
11/4
11/2
2
21/2
3
4
3/ 4
1/ 2
3/ 8
1/ 4
1/ 8
NPS
Length
min
Dimensions and tolerances (based on ASME/ANSI B16.11-1991 and BS 3799:1974)
Square Head Plug
Plugs and Bushings - ANSI B16.11/BS 3799
Socket Weld and Threaded Fittings
7-13
Socket Weld and Threaded Fittings
Hexagonal and Round Nipples - BS 3799
Hexagonal Nipples
Round Nipples
Hexagonal nipple dimensions (based on BS 3799:1974)
$
Nominal Size
Equal
in
mm
1/ 8
6
1/ 4
8
3/ 8
10
1/ 2
15
3/ 4
20
1
25
40
11/2
2
50
-
Reducing
in
mm
1/4 x 1/8
8x6
3/8 x 1/4
10 x 8
1/2 x 3/8
15 x 10
1/2 x 1/4
15 x 8
3/4 x 1/2
20 x 15
3/4 x 3/8
20 x 10
25 x 20
1 x 3/4
25 x 15
1 x 1/2
40 x 25
11/2 x 1
11/2 x 3/4 40 x 20
11/2 x 1/2 40 x 15
50 x 40
2 x 11/2
2x1
50 x 25
50 x 20
2 x 3/4
50 x 15
2 x 1/2
min
mm
11
15
15
18
18
22
22
22
27
27
27
35
35
35
50
50
50
50
62
62
62
62
62
%
min
3000 lb 6000 lb
mm
mm
5
2
8
6
5
2
11
8
8
6
14
11
11
8
8
6
19
13
14
11
11
8
24
17
19
13
14
11
38
30
24
17
19
13
14
11
49
39
38
30
24
17
19
13
14
11
&
(
)
:
min
min
min
min
mm
6
6
6
8
8
8
8
8
10
9
9
10
10
10
16
16
16
16
17
17
18
17
18
mm
10
15
15
16
16
20
20
20
21
21
21
25
25
25
26
26
26
26
27
27
27
27
27
mm
10
15
16
15
20
16
21
20
25
21
20
26
25
21
20
mm
26
36
31
40
39
48
44
43
52
50
46
60
56
55
68
67
63
62
71
70
70
65
65
Round nipple dimensions (based on BS 3799:1974)
Standard Lengths
Nominal Size
in
1/8
1/4
3/8
1/2
3/4
1
11/2
2
21/2
3
4
mm
6
8
10
15
20
25
40
50
65
80
100
mm
50
50
50
-
mm
75
75
75
75
75
75
75
75
-
/
mm
100
100
100
100
100
100
100
100
100
100
-
Wall Thickness
mm
150
150
150
150
150
150
150
150
150
150
150
3000 lb
7
6000 lb
-
Schedule 80
XXS
Note
Other round nipple lengths, L, are available when specified.
7-14
Aalco Tel. 01932 250100 Fax: 01932 250101
E-mail: [email protected]
Socket Weld and Threaded Fittings
Welding Bosses - BS 3799
Threaded Fitting
Socket Weld Fitting
Threaded welding boss dimensions (BS 3799:1974)
Length of Thread
Length
Bore Diameter
/
$
%
mm
6.70
10.21
10.36
13.56
13.86
17.34
18.38
19.22
28.89
30.48
33.02
mm
38
41
45
51
51
51
51
51
51
57
64
mm
8.4
11.1
14.2
18.0
23.0
29.0
44.0
56.0
67.0
82.0
95.0
Nominal Size
in
1
/8
1
/4
3
/8
1
/2
3
/4
1
11/2
2
21 / 2
3
4
mm
6
8
10
15
20
25
40
50
65
80
100
Outside Diameter
3000 lb
mm
16
19
22
29
35
45
64
76
95
110
140
'
6000 lb
mm
22
26
32
38
45
60
76
95
-
Socket-welding welding boss dimensions (BS 3799:1974)
Bore
Diameter
of Socket
min
NPS
%
in
/8
1
/4
3
/8
1
/2
3
/4
1
11/2
2
21/2
3
1
mm
6
8
10
15
20
25
40
50
65
80
mm
10.7
14.1
17.6
21.8
27.4
34.1
49.0
61.0
73.8
89.7
Aalco Tel. 01932 250100
Socket Wall
Thickness
min
3000 lb
mm
3.2
3.3
3.5
4.1
4.3
5.0
5.6
6.1
7.7
8.3
&
Bore Diameter of
Fitting
6000 lb
mm
5.2
6.1
7.0
7.8
9.5
10.4
12.2
Fax: 01932 250101
3000 lb
mm
6.8
9.2
12.5
15.5
21.0
26.5
40.5
52.0
62.0
78.0
'
6000 lb
mm
11.8
15.5
20.7
34.0
43.0
54.0
66.0
Length
Depth of
Socket
min
)
6
mm
28
32
34
38
38
35
32
29
29
29
mm
10
10
11
13
13
16
19
22
22
22
E-mail: [email protected]
7-15
Socket Weld and Threaded Fittings
Threaded Unions - BS 3799
Threaded union dimensions (BS 3799:1974)
Nominal Size
in
1
/8
1
/4
3
/8
1
/2
3
/4
1
11/4
11/2
2
21/2
3
7-16
mm
6
8
10
15
20
25
32
40
50
65
80
End to End
$
mm
40
43
48
51
57
64
70
79
89
118
121
Width A/F
Union Nut
min
%
mm
32
32
36
43
50
60
70
78
95
125
140
3000 lb
Height of
Width A/F of Thickness of
Union Nut
Ends
Shoulder
min
min
min
&
mm
16
18
19
21
24
25
29
30
37
48
51
Aalco Tel. 01932 250100 Fax: 01932 250101
'
mm
17
19
22
30
36
41
50
60
70
85
100
(
mm
3.2
3.2
3.2
4.0
4.8
4.8
5.6
5.6
6.4
9.6
12.7
Length of
Thread
min
/
mm
6.70
10.21
10.36
13.56
13.86
17.34
17.93
18.38
19.22
28.89
30.48
E-mail: [email protected]
Socket Weld and Threaded Fittings
Socket Weld Unions - BS 3799
Socket weld union dimensions (BS 3799:1974)
Depth of
Socket
min
NPS
in
1/8
1/4
3/8
1/2
3/4
1
11/4
11/2
2
21 / 2
3
mm
6
8
10
15
20
25
32
40
50
65
80
6
mm
10
10
10
10
13
13
13
13
16
16
16
3000 lb
Distance
Bore
Socket
Thickness
Bore
Width A/F
between Diameter
Wall
of
Diameter
of Nut
Bottom of
of
Thickness of Union Shoulder
min
Sockets Sockets
min
min
min
min
$
mm
17
17
17
18
20
26
28
30
36
57
70
%
mm
10.7
14.1
17.6
21.8
27.4
34.1
42.9
49.0
61.0
73.8
89.7
&
mm
3.2
3.3
3.5
4.1
4.3
5.0
5.3
5.6
6.1
7.7
8.3
'
mm
6.8
9.2
12.5
15.5
21.0
26.5
35.0
40.5
52.0
62.0
78.0
(
mm
3.2
3.2
3.2
4.0
4.8
4.8
5.6
5.6
6.4
9.6
12.7
)
mm
32
32
36
41
50
60
70
78
95
125
140
Height
of Nut
min
*
mm
16
18
19
21
24
25
29
30
37
48
51
Note
Bore diameter D corresponds to schedule 40 pipe.
Aalco Tel. 01932 250100
Fax: 01932 250101
E-mail: [email protected]
7-17
Socket Weld and Threaded Fittings
Swage Nipples - BS 3799
Plain
Threaded
Threaded
Plain
Dimensions of swage nipples (BS 3799:1974)
Parallel Length, min
Nominal Size
%
&
3000 lb 6000 lb
mm
mm
1.6
1.6
3.2
-
mm
10 x 8
15 x 10
15 x 8
mm
76
89
89
mm
48
56
56
mm
16
19
19
3/4
x 1/ 2
20 x 15
95
57
22
2.4
2.4
3/4
3/ 8
20 x 10
25 x 20
25 x 15
40 x 25
40 x 20
40 x 15
50 x 40
50 x 25
50 x 20
50 x 15
65 x 50
65 x 40
80 x 65
80 x 50
80 x 40
100 x 80
100 x 65
95
102
102
114
114
114
165
165
165
165
178
178
203
203
203
229
229
57
64
64
70
70
70
108
108
108
108
114
114
133
133
133
140
140
22
22
22
25
25
25
29
29
29
29
32
32
41
41
41
48
48
4.0
2.8
5.2
6.7
9.5
11.9
5.6
12.7
15.5
17.5
4.8
10.3
7.1
11.9
17.5
11.9
19.1
2.0
4.4
6.4
8.3
10.7
5.2
11.5
13.5
15.9
3.2
8.3
6.7
9.9
15.5
10.7
17.5
x
1 x 3/4
1 x 1/2
11/2 x 1
11/2 x 3/4
11/2 x 1/2
2 x 11/2
2x1
2 x 3/4
2 x 1/2
21/2 x 2
21/2 x 11/2
3 x 21 / 2
3x2
3 x 11/2
4x3
4 x 21 / 2
Aalco Tel. 01932 250100 Fax: 01932 250101
Wall Thickness
7(both ends)
(
in
/8 x 1/4
1
/2 x 3/8
1
/2 x 1/4
3
7-18
$
Eccentricity
Threaded
/Plain
Plain
Threaded
3000 lb
6000 lb
6000 lb
Schedule
160
-
XXS
-
Schedule
80
Schedule
160
XXS
E-mail: [email protected]
Socket Weld and Threaded Fittings
Outlets
Outlets may be used in place of welded or threaded tees to reduce costs and provide
more flexible fabrication (‘run your pipe then weld on fittings’) while maintaining full pipe
strength for all sizes, weights and schedules. The following pages contain the dimension
tables for socket weld, threaded and buttweld outlets.
Note
Manufacture’s information is used as the basis for information in this outlets subsection. Manufacturers’ data may vary.
Specifications
❍
❍
Manufacture. Socket weld and threaded outlets
are manufactured to the requirements of ASME/
ANSI B16.11 - Forged fitting, socket welding and
threaded, although outlet dimensions are not
specified in B16.11. Buttweld outlets are
manufactured to the requirements of ASME/ANSI
B16.9 - Factory-made wrought steel buttwelding
fittings, although outlet dimensions are not
specified in B16.9.
Pressure Rating. Outlets are rated the same as
seamless steel pipe, as defined in the American
National Standard Codes for Pressure Piping,
ANSI B31.1 and B31.3, the ASME Boiler and
Pressure Vessel Code. Refer to page 5-28 for a
summary of pipe pressure rating calculations.
Designations
In order to reduce warehouse inventories, outlets of the same size are designed to be used with the a range of
run pipe sizes. This can be done without causing a problem when welding because the resulting maximum gap
between welded surfaces (caused by the curvature of the outlet when compared with the pipe) is only 1/32 in
(0.8 mm).
The table below shows the range of outlets available.
For example: outlets with a run size range (e.g. 8 - 3 x 1/2) will fit on any size of run pipes in the range (e.g. 3,
31/2, 4, 5, 6 or 8).
3/4
1/2
3/4
31/4
1
11/2-11/4
1
11/221/2-2
11/4
5-3
21/2-2
8-3
12-6
36-10 36-14
Flat
Flat
1
1-3/4
2-11/4 21/2-11/4
Run pipe sizes
(NPS) for:
10-3
6-21/2
6000 lb Socket weld 36-8
36-12
Outlets,
Flat
Flat
6000 lb Threaded
Outlets,
XXS Buttweld
Outlets.
-
Aalco Tel. 01932 250100
1
1
11/4
11/2
Outlet Pipe Sizes (NPS)
2
11/4
11/2
21/2
1/4
1
2
1 /2
1
21/2
2
3
11/2
21 / 2
2
3
21 / 2
31/2
2
21/2
3
21 / 2
31/2-3
5-4
10-6
36-12
Flat
11/4-11/2
21/2-2
10-3
36-12
Flat
-
31/2-3
5-4
8-6
18-10
36-20
Flat
11/2
21/2-2
31/2-3
8-4
20-10
36-24
Flat
-
4-31/2
6-5
12-8
24-14
36-26
Flat
2
Fax: 01932 250101
21 / 2
31/2-3
5-4
8-6
18-10
36-20
Flat
-
31 / 2
4
3
3
31 / 2
4
31/2
31/2
4
5
4
4
5
6
5
6
8
>4
Order to specific run pipe size
Run pipe sizes
(NPS) for:
3000 lb Socket
Weld Outlets,
3000 lb Threaded
Outlets,
Std & XS Buttweld
Outlets,
1/2
4
5
6
8
10
5
6
8
10
14-2
6
8
10 14-12 20-6
10-8 12-10 14-12 20-16 36-4
18-12 18-14 20-16 36-24 Flat
36-20 36-20 36-24
Flat
Flat
Flat
21 / 2
3
4
5
Order to specific run pipe size
6
10-8
20-12
36-24
Flat
E-mail: [email protected]
7-19
Socket Weld and Threaded Fittings
Socket Weld Outlets
Reducing Size
Full Size
3000 lb socket weld outlet dimensions and weights
Reducing sizes
Outlet
Size
$
&
)
*
mm
mm
mm
mm
25.50
27.00
33.40
33.40
34.80
38.00
46.00
50.70
53.80
57.00
1/2
3/4
1
11/4
11/2
2
21/2
3
31/2
4
24.00
31.80
30.00
36.60
36.50
46.10
44.50
55.60
51.00
62.00
65.00
74.70
76.15
87.40
93.50 104.80
101.50 122.30
120.50 130.20
10.00
13.00
13.00
13.00
13.00
16.00
16.00
16.00
19.00
19.00
Full sizes
Weight
kg/
piece
0.140
0.150
0.300
0.400
0.470
0.730
1.250
1.720
1.950
3.300
$
&
'
)
*
mm
mm
mm
mm
mm
25.50
27.00
33.40
33.40
34.80
38.00
46.00
50.70
53.30
55.50
22.40
16.00
31.80
30.00
21.00
36.60
36.50
26.70
46.10
44.50
35.00
55.60
51.00
40.90
62.00
65.00
52.50
74.70
76.15
62.80
87.40
93.50
77.90 104.80
112.75 90.10 117.50
127.00 102.20 130.20
10.00
13.00
13.00
13.00
13.00
16.00
16.00
16.00
19.00
19.00
Weight
kg/
piece
0.060
0.110
0.300
0.300
0.400
0.630
1.030
1.700
1.950
3.000
6000 lb socket weld outlet dimensions and weights
Outlet
Size
1
/2
3
/4
1
11/4
11/2
7-20
Reducing sizes
$
mm
31.50
36.50
39.60
41.00
42.70
&
mm
19.00
25.50
33.40
38.00
49.30
)
mm
40.00
46.00
57.20
65.10
76.30
Aalco Tel. 01932 250100 Fax: 01932 250101
*
mm
10.00
13.00
13.00
13.00
13.00
Weight
kg/piece
0.250
0.370
0.600
0.750
0.920
E-mail: [email protected]
Socket Weld and Threaded Fittings
Threaded and Nipple Outlets
Reducing Size
Full Size
3000 lb threaded outlet dimensions and weights
Outlet
Size
1/2
3/4
1
11/4
11/2
2
21 / 2
3
31 / 2
4
Reducing sizes
$
mm
25.50
27.00
33.40
33.40
34.80
38.00
46.00
50.70
53.80
57.00
&
mm
24.00
30.00
36.50
44.50
51.00
65.00
76.15
93.50
101.50
120.50
)
Full sizes
Weight
mm
31.80
36.60
46.10
55.60
62.00
74.70
87.40
104.80
122.30
130.20
$
kg/piece
0.110
0.160
0.300
0.410
0.450
0.800
1.370
2.000
2.610
3.230
mm
25.50
27.00
33.40
33.40
34.80
38.00
46.00
50.70
53.30
55.50
&
mm
24.00
30.00
36.50
44.50
51.00
65.00
76.15
93.50
112.75
120.50
'
mm
16.00
20.65
27.00
34.90
41.20
52.40
63.50
77.80
90.50
103.20
)
mm
31.80
36.60
46.10
55.60
62.00
74.70
87.40
104.80
117.50
130.20
Weight
kg/piece
0.070
0.110
0.200
0.320
0.410
0.650
1.130
1.950
2.050
3.090
6000 lb threaded outlet dimensions and weights
Outlet
Size
1/2
3/4
1
11/4
11/2
2
Reducing sizes
$
mm
31.50
36.50
39.60
41.00
42.70
52.10
&
Weight
)
mm
19.00
25.50
33.40
38.00
49.30
70.00
mm
40.00
46.00
57.20
65.10
76.30
92.10
kg/piece
0.020
0.350
0.600
0710
0.900
2.300
Plain end nipple outlet dimensions
Outlet
Size
1
/2
/4
1
11/4
11/2
2
3
Reducing sizes
3000 lb
6000 lb
$
mm
89
89
89
89
89
89
&
mm
24
30
36.5
44.5
51
65
$
mm
89
89
89
89
89
89
&
mm
14.5
19.0
25.5
33.4
38.0
43
Nipple
Aalco Tel. 01932 250100
Fax: 01932 250101
E-mail: [email protected]
7-21
Socket Weld and Threaded Fittings
Buttweld Outlets
Reducing Size
Full Size
Standard buttweld outlet dimensions and weights
Reducing sizes
Outlet Size
1/ 2
3/ 4
1
11/4
11/2
2
21/2
3
31/2
4
5
6
8
10
12
14
16
18
20
24
26
30
36
7-22
$
mm
19.00
22.20
27.00
31.50
33.40
38.00
41.20
44.50
47.50
51.00
57.00
60.30
69.80
78.00
86.00
89.00
94.00
97.00
102.00
144.00
156.00
175.00
206.00
&
mm
24.00
30.00
36.50
44.50
51.00
65.00
76.15
93.50
112.60
120.50
141.30
170.00
220.50
274.00
324.00
356.00
406.00
459.00
508.00
609.00
660.00
762.00
914.00
Weight
kg/piece
0.08
0.11
0.25
0.35
0.45
0.80
1.13
1.82
2.50
2.86
4.65
6.45
10.66
18.00
27.00
30.00
34.00
44.00
54.00
101.00
120.00
190.00
310.00
Full sizes
$
mm
19.00
22.20
27.00
31.50
33.40
38.00
41.20
44.50
47.50
51.00
57.00
60.30
69.80
78.00
86.00
89.00
94.00
103.00
117.00
144.00
156.00
175.00
206.00
Aalco Tel. 01932 250100 Fax: 01932 250101
&
mm
24.00
30.00
36.50
44.50
51.00
65.00
76.15
93.50
112.60
120.50
141.30
170.00
220.50
274.00
324.00
356.00
406.00
473.00
508.00
609.00
660.00
762.00
914.00
'
mm
15.80
21.00
26.60
35.00
40.90
52.50
62.80
78.00
90.20
102.20
128.20
154.00
202.50
254.00
304.50
336.50
387.00
438.00
489.00
590.00
641.00
743.00
895.00
Weight
kg/piece
0.07
0.11
0.18
0.32
0.36
0.68
1.02
1.70
2.30
3.10
3.90
6.70
13.00
16.00
27.00
32.00
42.00
57.00
80.00
114.00
138.00
230.00
336.00
E-mail: [email protected]
Socket Weld and Threaded Fittings
Buttweld Outlets
Reducing Size
Full Size
Extra strong (XS) buttweld outlets dimensions and weights
Reducing sizes
Outlet Size
1
/2
3
/4
1
11/4
11/2
2
21/2
3
31/2
4
5
6
8
10
12
14
16
18
20
24
26
30
36
$
mm
19
22.20
27.00
31.50
33.40
38.00
41.20
44.50
47.50
51.00
57.00
78.00
98.50
94.00
103.00
100.00
106.50
111.00
119.00
152.00
165.00
181.00
212.50
&
mm
24.00
30.00
36.50
44.50
51.00
65.00
76.15
93.50
112.60
120.50
141.30
170.00
220.00
265.00
613.00
351.00
403.00
456.00
510.00
610.00
660.00
762.00
914.00
Full sizes
Weight
$
kg/piece
0.09
0.14
0.21
0.41
0.50
0.80
1.18
1.90
2.55
3.00
4.75
10.50
17.00
21.00
28.00
32.00
46.50
59.00
72.00
142.00
168.00
218.00
404.00
mm
19.00
22.20
25.40
28.50
31.50
38.00
41.20
44.50
47.50
51.00
57.00
78.00
98.50
98.30
100.00
105.50
113.00
119.00
127.00
152.00
165.00
181.00
212.00
&
mm
24.00
30.00
36.50
44.50
51.00
65.00
76.15
93.50
112.60
120.50
141.30
170.00
220.00
256.00
320.00
355.00
419.00
474.00
528.00
610.00
660.00
762.00
914.00
'
mm
13.90
18.90
24.30
32.80
38.10
49.30
59.00
73.70
85.40
97.20
122.30
146.30
194.00
247.50
298.00
330.00
381.00
432.00
482.50
584.20
635.00
738.00
889.00
Weight
kg/piece
0.07
0.11
0.18
0.32
0.41
0.75
1.15
1.90
2.30
3.50
4.30
6.80
14.60
21.00
28.00
34.50
52.20
59.00
85.00
146.00
182.00
255.00
446.00
Schedule 160 and double extra strong (XXS) buttweld outlets dimensions and weights
Outlet Size
1/ 2
3/ 4
1
11/4
11/2
2
21/2
3
4
5
6
Reducing sizes
$
&
mm
mm
28.50
14.30
31.50
19.00
38.00
25.50
44.50
33.40
50.70
38.00
55.50
42.90
61.80
53.90
73.00
73.00
84.00
98.40
93.50
122.20
104.70
146.00
Aalco Tel. 01932 250100
Weight
kg/piece
0.110
0.320
0.380
0.570
0.800
1.00
1.550
2.900
4.770
6.470
12.80
Fax: 01932 250101
$
mm
28.50
31.50
38.00
44.50
50.70
55.50
61.80
73.00
84.00
93.50
104.70
Full sizes
&
mm
14.30
19.00
25.50
33.40
38.00
42.90
53.90
73.00
98.40
122.20
146.00
'
mm
0.110
0.320
0.380
0.570
0.800
1.00
1.550
2.900
4.770
6.470
13.80
E-mail: [email protected]
7-23
Socket Weld and Threaded Fittings
45° Lateral Outlets
Socket Weld
Threaded
Buttweld
3000 lb lateral outlets - for 45° lateral connections dimensions and weights
Dimensions
Nominal Run
Sizes
21/2-11/4,
12-3
21/2-11/4,
12-3
21/2-11/4,
12-3
11/2-11/4, 5-2,
12-6
21/2-2, 5-2,
12-6
21/2-2, 5-3,
12-6
21/2-2, 5-3,
12-6
5-4, 8-6,
12-10
Outlet Size
&
OD of Outlet
(
Socket Weld &
Threaded
Weight
Buttweld
in
mm
mm
1/ 4
36.5
39.7
31.8
mm
-
0.23
3/ 8
36.5
39.7
31.8
0.23
1
/2
36.5
39.7
31.8
3/ 4
43.6
47.6
35.7
1
54.0
57.2
45.2
11/4
67.5
61.9
54.6
11/2
76.2
66.7
63.5
1.20
2
104.8
81.0
82.6
3.29
Outside
diameter at
bevel
matches
the outlet
pipe diameter
kg/piece
0.30
0.34
0.52
0.86
6000 lb lateral outlets - for 45° lateral connections dimensions and weights
Dimensions
Nominal Elbow
Size
21/2-11/4,
12-3
21/2-11/4,
12-3
11/2-11/4, 5-2,
12-6
21/2-2, 5-3,
12-6
21/2-2, 5-3,
12-6
21/2-2, 5-3,
12-6
5-4, 8-6,
12-10
7-24
Outlet Size
&
(
OD of Outlet
Socket Weld &
Threaded
in
mm
mm
1
/4
36.5
39.7
31.8
mm
3/ 8
36.5
39.7
31.8
Weight
Buttweld
-
kg/piece
0.34
0.34
Outside
diameter at
bevel
matches
the outlet
pipe diameter
1/ 2
43.6
47.6
35.7
3
/4
54.0
57.2
45.2
1
67.5
61.9
54.8
11/4
76.2
66.7
63.5
1.32
11/2
104.8
81.0
82.6
2.80
Aalco Tel. 01932 250100 Fax: 01932 250101
0.39
0.57
1.00
E-mail: [email protected]
Socket Weld and Threaded Fittings
Elbow Outlets
Threaded
Socket Weld
Buttweld
3000 lb elbow outlet for 90° long radius elbow, dimensions and weights
Dimensions
Nominal Elbow
Size
Outlet Size
36-11/4
36-11/4
36-11/4
36-11/4
36-2
36-2
36-2
36-3
1/4
in
3/8
1
/2
3
/4
1
11/4
11/2
2
OD of Outlet
&
(
mm
38.1
38.1
38.1
43.6
54.0
73.0
79.4
106.4
mm
38.1
38.1
38.1
45.2
52.4
55.6
58.8
69.9
Weight
Socket Weld &
Threaded
Buttweld
mm
31.8
31.8
31.8
35.7
45.2
54.8
63.5
82.6
Outside
diameter at
bevel
matches
the outlet
pipe diameter
kg/piece
0.23
0.23
0.30
0.34
0.52
0.86
1.20
2.39
6000 lb elbow outlet for 90° long radius elbow, dimensions and weights
Dimensions
Nominal Elbow
Size
Outlet Size
36-11/4
36-11/4
36-11/4
36-2
36-2
36-2
36-3
1/4
in
3/8
1
/2
3
/4
1
11/4
11/2
Aalco Tel. 01932 250100
&
(
mm
38.1
38.1
43.6
54.0
73.0
79.4
106.4
mm
38.1
38.1
45.2
54.4
55.6
58.8
69.6
Fax: 01932 250101
OD of Outlet
Weight
Socket Weld &
Threaded
Buttweld
mm
31.8
31.8
35.7
45.2
54.8
63.5
82.6
Outside
diameter at
bevel
matches
the outlet
pipe diameter
kg/piece
0.34
0.34
0.39
0.57
1.00
1.77
2.80
E-mail: [email protected]
7-25
Socket Weld and Threaded Fittings
Low Pressure Threaded Fittings - General
This subsection summarises requirements for 150 lb low pressure (LP) threaded fittings
as defined in BS 1740 : Part 1 : 1971 (as confirmed October 1983) - Wrought steel pipe
fittings (screwed BSP thread). Dimensions and tolerances are reproduced in the following
pages. Stainless steel low pressure threaded fittings are in general accordance with these
dimensions and tolerances.
Dimensions and Tolerances
BS 1740 dimensions are as detailed in the following pages. Length tolerances are as specified below.
BS 1740 Tolerances
Length of Socket Unions
NPS
±mm
6
6
10
12
16
-
<25
25 to 40
>40 to 65
>65 to 75
>75 to 110
>75 to 150
>150
Length or Centre to Face
Tolerances for Other Fittings
±mm
1.5
3.0
4.5
6.0
8.0
10.0
Threading Requirements
Fittings manufactured to BS 1740 are threaded in accordance with BS 21:1985, Pipe threads for tubes and
fittings where pressure-tight joints are made on the threads (metric dimensions). Summary dimensions are
included below. For further information on BS 21 threads see page 10-10.
Internal Parallel Thread (Rp)
External Taper Thread (R)
Internal parallel and external taper thread
Nominal Size of
Outlet
in
1
/8
1
/4
3
/8
1
/2
3
/4
1
11/4
11/2
2
21 / 2
3
4
5
6
7-26
mm
6
8
10
15
20
25
32
40
50
65
80
100
125
150
Minimum Outside
Diameter
'
mm
15.0
18.5
22.0
27.0
32.5
39.5
49.0
56.0
68.0
84.0
98.0
124.0
151.0
178.0
Minimum Outside Diameter of
Body Behind External Thread
(
mm
9.8
13.3
16.8
21.1
26.6
33.4
42.1
48.0
59.8
75.4
88.1
113.3
138.7
164.1
Aalco Tel. 01932 250100 Fax: 01932 250101
Minimum Inside Diameter of
Body Behind Internal Thread
G
mm
8.6
11.4
15.0
18.6
24.1
30.3
39.0
44.8
56.7
72.2
84.9
110.1
135.5
160.9
E-mail: [email protected]
Socket Weld and Threaded Fittings
Equal Elbows, Tees and Crosses - BS 1740
Equal Elbow
Equal Tee
Cross Equal
Equal 45° Elbow
Threaded equal 90°elbow, tee and cross dimensions (BS 1740:Part 1)
Centre to Face
Nominal Size of Outlets
in
1/8
1/4
3/8
1/2
3/4
1
11/4
11/2
2
21 / 2
3
4
5
6
$
mm
6
8
10
15
20
25
32
40
50
65
80
100
125
150
mm
16
22
25
32
35
43
51
52
64
76
89
115
140
160
Threaded equal 45° equal elbow dimensions (BS 1740:Part 1)
Centre to Face
Nominal Size of Outlets
in
3/8
1/2
3/4
1
11/4
11/2
2
$
mm
10
15
20
25
32
40
50
Aalco Tel. 01932 250100
mm
19
22
27
33
38
44
51
Fax: 01932 250101
E-mail: [email protected]
7-27
Socket Weld and Threaded Fittings
Elbows - BS 1740
Reducing Elbows
Equal Elbows, Male and Female
Note
These may also be referred to as Street Elbows
Threaded equal elbows, male and female dimensions (BS 1740:Part 1)
Nominal Size of Outlets
in
/4
3
/8
1
/2
3
/4
1
11/4
11/2
2
21 / 2
3
4
1
mm
8
10
15
20
25
32
40
50
65
80
100
Centre to face, min
$
%
mm
19
21
25
30
37
43
49
59
68
81
100
mm
27
29
35
40
46
54
57
70
83
94
115
Bore of Male
End min
mm
6.5
8.5
11.5
18.0
24.0
30.0
37.0
48.0
62.0
75.0
97.0
Bore of Male
End max
mm
8.0
10.5
13.0
21.0
26.0
32.0
39.0
51.0
66.0
79.0
104.0
Threaded reducing elbow dimensions (BS 1740:Part 1)
Nominal Size of Outlets
(1 x 2)
in
mm
1/2 x 3/4
15 x 8
1/2 x 3/8
15 x 10
3/4 x 3/8 1
20 x 101
3/4 x 1/2
20 x 15
25 x 15
1 x 1/2
25 x 20
1 x 3/4
11/4 x 1/2 1
32 x 151
32 x 20
11/4 x 3/4
32 x 25
11/4 x 1
40 x 20
11/2 x 3/4
40 x 25
11/2 x 1
40 x 32
11/2 x 11/4
2 x 3/4 1
50 x 201
2x1
50 x 25
50 x 32
2 x 11/4
50 x 40
2 x 11/2
Centre to Face, min
$
mm
25
27
29
32
35
38
38
41
44
41
44
49
44
48
52
56
%
mm
32
32
35
35
43
43
51
51
51
52
52
52
64
64
64
64
Note
1 Non-prefered size. The use of these sizes should be avoided.
7-28
Aalco Tel. 01932 250100 Fax: 01932 250101
E-mail: [email protected]
Socket Weld and Threaded Fittings
Increasing and Reducing Tees - BS 1740
Reducing on the Run
and Branch Tee
Increasing on the Branch Tee
Reducing on the
Run Only Tee
Threaded tee, increasing on branch, dimensions (BS 1740:Part 1)
Centre to Face
min
Nominal Size of Outlets
(1 x 2)
in
3/8 x 1/2
1/2 x 3/4
1/ 2 x 1
3/ 4 x 1
1 x 11/4
1 x 11/2
11/4 x 11/2
11/2 x 2
2 x 21/2
2x3
mm
10 x 15
15 x 20
15 x 25
20 x 25
25 x 32
25 x 40
32 x 40
40 x 50
50 x 65
50 x 80
$
%
mm
32
35
43
43
51
52
52
64
76
89
mm
27
32
35
38
44
44
49
56
67
73
Threaded tee, reducing on branch and/or run, dimensions (BS 1740:Part 1)
Nominal Size of Outlets
(1 x 2 x 3)
in
3/4 x 1/2 x 1/2
3/4 x 1/2 x 3/4
1 x 3/4 x 1/2
1 x 3/4 x 3/4
1 x 3/ 4 x 1
1
1 / 4 x 1 x 3/ 4
11/4 x 1 x 1
11/4 x 1 x 11/4
11/2 x 1 x 1
Aalco Tel. 01932 250100
mm
20 x 15 x 15
20 x 15 x 20
25 x 20 x 15
25 x 20 x 20
25 x 20 x 25
32 x 25 x 20
32 x 25 x 25
32 x 25 x 32
40 x 25 x 25
Fax: 01932 250101
Centre to Face
min
$
mm
32
35
35
38
43
41
44
51
44
%
mm
35
35
43
43
43
51
51
51
52
E-mail: [email protected]
7-29
Socket Weld and Threaded Fittings
Reducing Tees - BS 1740
Reducing on the Branch Tee
Reducing tee dimensions (BS 1740:Part 1)
Nominal Size of Outlets
(1 x 2)
in
mm
3/8 x 1/4
10 x 8
1/2 x 1/4
15 x 8
1/2 x 3/8
15 x 10
3/4 x 1/4
20 x 8
3/4 x 3/8
20 x 10
3/4 x 1/2
20 x 15
1 x 1/4 1
25 x 81
1
3
1 x /8
25 x 101
25 x 15
1 x 1/2
25 x 20
1 x 3/4
32 x 15
11/4 x 1/2
32 x 20
11/4 x 3/4
32 x 25
11/4 x 1
11/2 x 1/2 1
40 x 151
40 x 20
11/2 x 3/4
40 x 25
11/2 x 1
40 x 32
11/2 x 11/4
2 x 1/2 1
50 x 151
2 x 3/4 1
50 x 201
2x1
50 x 25
50 x 32
2 x 11/4
50 x 40
2 x 11/2
65 x 25
21/2 x 1
65 x 40
21/2 x 11/2
65 x 50
21/2 x 2
3x1
80 x 25
80 x 32
3 x 11/4
80 x 40
3 x 11/2
3x2
80 x 50
80 x 65
3 x 21 / 2
100 x 40
4 x 11/2
4x2
100 x 50
4x3
100 x 80
6x3
150 x 80
6x4
150 x 100
Centre to Face, min
$
mm
22
25
27
27
29
32
30
32
35
38
38
41
44
38
41
44
49
41
44
48
52
56
54
60
67
60
64
67
73
79
76
83
95
120
135
%
mm
24
32
32
35
35
35
43
43
43
43
51
51
51
52
52
52
52
64
64
64
64
64
76
76
76
89
89
89
89
89
115
115
115
160
160
Note
1 Non-prefered size. The use of these sizes should be avoided.
7-30
Aalco Tel. 01932 250100 Fax: 01932 250101
E-mail: [email protected]
Socket Weld and Threaded Fittings
Sockets - BS 1740
Standard Socket
Faced Socket
for Longscrews
Half Socket
Backnut
Equal socket, half socket, faced socket and backnut dimensions (BS1740:Part 1)
Nominal Size of
Outlets
in
1/8
1/4
3/8
1/2
3/4
1
11/4
11/2
2
21/2
3
4
5
6
mm
6
8
10
15
20
25
32
40
50
65
80
100
125
150
Outside
Diameter
min
Standard
Socket
Length
min
Half
Socket
Length
min
Faced
Socket
Length
min
Backnut
Width
Across
Flats
$
%
&
'
mm
15.0
18.5
22.0
27.0
32.5
39.5
49.0
56.0
68.0
84.0
98.0
124.0
151.0
178.0
mm
19
27
28
37
39
46
51
51
60
69
75
87
96
96
mm
8
11
12
16
19
21
25
25
28
30
35
40
44
44
mm
17
25
25
35
37
43
48
48
57
65
71
84
92
92
mm
17.0
19.0
24.0
30.0
36.0
41.0
50.0
60.0
70.0
90.0
100.0
130.0
160.0
190.0
Backnut Thickness
Minimum
mm
6.5
6.5
7.0
8.0
9.0
9.5
11.0
12.0
13.0
17.0
21.0
22.0
24.0
25.0
7
Tolerance
mm
+1.5
+1.5
+1.5
+1.5
+1.5
+1.5
+1.5
+1.5
+1.5
+3.0
+3.0
+3.0
+3.0
+3.0
Note
The backnut is used with the faced socket for long screws.
Aalco Tel. 01932 250100
Fax: 01932 250101
E-mail: [email protected]
7-31
Socket Weld and Threaded Fittings
Sockets - BS 1740
Reducing socket dimensions
(BS1740:Part 1) (Continued)
Nominal Size of Outlets
(1 x 2)
Reducing Socket
Reducing socket dimensions
(BS1740:Part 1)
Nominal Size of Outlets
(1 x 2)
in
1/4 x 1/8
3/8 x 1/8
3/8 x 1/4
1/2 x 1/8
1/2 x 1/4
1/2 x 3/8
3/4 x 1/4
3/4 x 3/8
3
/4 x 1/2
1 x 1/4
1 x 3/8
1 x 1/2
1 x 3/4
11/4 x 3/8
Centre to Face
min
mm
8x6
10 x 6
10 x 8
15 x 6
15 x 8
15 x 10
20 x 8
20 x 10
20 x 15
25 x 8
25 x 10
25 x 15
25 x 20
32 x 10
$
mm
25
30
29
41
40
38
44
43
41
54
52
51
49
60
in
11/4 x 1/2
11/4 x 3/4
11/4 x 1
11/2 x 1/2
11/2 x 3/4
11/2 x 1
11/2 x 11/4
2 x 1/ 2
2 x 3/4
2x1
2 x 11/4
2 x 11/2
21 / 2 x 1
21/2 x 11/4
21/2 x 11/2
21 / 2 x 2
3x1
3 x 11/4
3 x 11/2
3x2
3 x 21/2
4 x 11/2
4x2
4 x 21/2
4x3
5x3
5x4
6x3
6x4
mm
32 x 15
32 x 20
32 x 25
40 x 15
40 x 20
40 x 25
40 x 32
50 x 15
50 x 20
50 x 25
50 x 32
50 x 40
65 x 25
65 x 32
65 x 40
65 x 50
80 x 25
80 x 32
80 x 40
80 x 50
80 x 65
100 x 40
100 x 50
100 x 65
100 x 80
125 x 80
125 x 100
150 x 80
150 x 100
Centre to Face
min
$
mm
59
57
56
65
64
62
60
70
68
67
65
64
76
75
73
71
86
84
83
81
79
105
100
100
98
115
115
140
140
Socket unions dimensions (BS 1740:Part 1)
Nominal Size of Outlet
Socket Union
7-32
Aalco Tel. 01932 250100 Fax: 01932 250101
in
1/8
1/4
3/8
1/2
3/4
1
11/4
11/2
2
mm
6
8
10
15
20
25
32
40
50
Length
min
$
mm
38
44
51
57
67
76
85
100
110
E-mail: [email protected]
Socket Weld and Threaded Fittings
Caps and Plugs - BS 1740
Cap dimensions (BS 1740:Part 1) (Continued)
Nominal Size
Flat Cap
in
1
/4
3/8
1/2
3/4
1
11/4
11/2
2
21 / 2
3
4
5
6
mm
8
10
15
20
25
32
40
50
65
80
100
125
150
Size of
Square,
approx
Internal
Diameter,
max
Dome Cap
Cap dimensions (BS 1740:Part 1)
Nominal Size
in
1/8
mm
6
Length
min
$
mm
19
Thickness
min
7
mm
3.5
Length
min
Thickness
min
$
7
mm
24
27
37
38
44
51
54
60
67
73
86
98
98
mm
3.5
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.0
7.0
7.0
7.5
8.5
Plugs
Plug dimensions (BS 1740:Part 1)
Nominal Size
in
1/ 8
1/ 4
3/ 8
1/ 2
3/ 4
1
11/4
11/2
2
21/2
3
4
5
6
mm
6
8
10
15
20
25
32
40
50
65
80
100
125
150
Length of
Thread for
Basic
Guage
Length, min
$
mm
6.5
9.7
10.1
13.2
14.5
16.8
19.1
19.1
23.4
26.7
29.8
35.8
40.1
40.1
Effective
Height of
Square,
min
%
mm
6
6
10
10
12
12
16
16
19
19
22
25
29
32
&
mm
6
9
11
13
14
17
22
27
32
37
37
46
51
60
'
mm
22
31
33
48
62
73
97
120
145
Thickness
of Metal,
min
Fitting
Allowance
in BS 21
.
turns
23 / 4
23 / 4
23 / 4
23 / 4
23 / 4
23 / 4
23 / 4
23 / 4
31 / 4
4
4
41 / 2
5
5
mm
4
5
5
5
6
8
10
12
12
Note
dimension is to be not less than the fitting allowance in BS 21 (see page 10-10).
* This
Plugs in sizes 25 to 150 may be solid or hollow. The purchaser should stated which is required on the order.
Aalco Tel. 01932 250100
Fax: 01932 250101
E-mail: [email protected]
7-33
Socket Weld and Threaded Fittings
Hexagonal Bushes and Nipples - BS 1740
Hexagonal Bushes
Hexagonal Nipple
Hexagonal bush dimensions (BS 1740:Part 1)
Nominal Size
in
1/4
3/8
1/2
3/4
1
11/4
11/2
2
21 / 2
3
4
5
6
mm
8
10
15
20
25
32
40
50
65
80
100
125
150
Minimum Length of
External Thread for
Basic Gauge Length
plus Die Clearance,
min
Thickness of
Hexagon
/
Overall Length
min
7
mm
12.5
12.5
17.5
19.0
21.0
24.0
24.0
27.0
32.0
35.0
40.0
45.0
45.0
Width Across Flats
of Hexagon
$
mm
6
8
8
10
10
11
13
14
16
19
22
25
25
)
mm
18.5
20.5
25.5
29.0
31.0
35.0
37.0
41.0
48.0
54.0
62.0
70.0
70.0
mm
14.0
17.0
22.0
27.0
36.0
46.0
50.0
60.0
78.0
90.0
115.0
140.0
166.0
Hexagonal nipple dimensions (BS 1740:Part 1)
Nominal size
in
1/8
1/4
3/8
1/2
3/4
1
11/4
11/2
2
21 / 2
3
4
5
6
7-34
mm
6
8
10
15
20
25
32
40
50
65
80
100
125
150
Minimum
Length of
External Thread
for Basic Gauge
Length plus Die
Clearance, min
/
mm
9.5
12.5
12.5
17.5
19.0
21.0
24.0
24.0
27.0
32.0
35.0
40.0
45.0
45.0
Thickness of
Hexagon
Overall Length
min
7
mm
6
6
8
8
10
10
11
13
14
16
19
22
25
25
Aalco Tel. 01932 250100 Fax: 01932 250101
$
mm
25
31
33
43
48
52
59
61
68
80
89
102
115
115
Diameter of
Bore
max
&
mm
5.5
6.5
9.5
12.5
19.0
25.0
32.0
38.0
51.0
64.0
76.0
100.0
125.0
150.0
Width Across
Flats of
Hexagon
)
mm
12.0
14.0
17.0
22.0
27.0
36.0
46.0
50.0
60.0
78.0
90.0
115.0
140.0
166.0
E-mail: [email protected]