Tank Flanges – Series 250
Standard Flat Type with Pilot
Forged Steel
Inches / Pounds
STANDARD FLAT TYPE WITH PILOT
SERIES
PIPE
SIZE
A
B
C
D
E
F
250
251
252
*253
*254
*255
*256
*257
258
259
260
261
262
⅛
¼
⅜
½
¾
1
1¼
1½
2
2½
3
3½
4
1.375
1.500
1.625
1.813
2.062
2.375
2.500
3.031
3.500
4.062
4.625
5.125
5.813
.875
1.000
1.063
1.188
1.438
1.750
2.125
2.375
2.875
3.313
3.938
4.438
4.938
.469
.500
.500
.625
.750
.830
.875
.875
.813
1.000
1.000
1.000
1.125
.078
.094
.094
.156
.156
.196
.196
.204
.094
.094
.094
.094
.125
.844
.969
.938
1.156
1.343
1.703
1.938
2.313
2.688
3.188
3.688
4.188
4.750
.094
.125
.125
.156
.156
.188
.188
.188
.188
.188
.188
.188
.188
* New Forging Technology
ASTM A105/ASME SA105
ASTM A181-70/ASME SA181-70