PIASTRE
DI SCORRIMENTO
SLIDING PLATES
121
GENERALITA’
INTRODUCTION
Le piastre di scorrimento sono dispositivi che
servono per sostenere il peso di tubazioni che, per
effetto delle variazioni termiche e di altre cause,
presentano nei punti di sostegno degli spostamenti
lungo le direttrici complanari al piano di appoggio.
Sliding plates are used to support the weight of
pipes which, because of temperature variations and
other reasons, have support points with shifts along
the two directions coplanar with bearing base.
Materials:
1 - Carbon steel (SJR 235 UNI/EN 10025:92)
or equivalent
2 - INOX Steel (AISI 304) or equivalent
3 - T° 울 200°C = PTFE
200°C < T° 울 350°C = CuSn7
T° > 350°C = Graphite
Materiali:
1 - Acciaio (SJR 235 UNI/EN 10025:92)
o equivalente
2 - Acciaio INOX (AISI 304) o equivalente
3 - T° 울 200°C = PTFE
200°C < T° 울 350°C = CuSn7
T° > 350°C = Grafite
TYPE A
TYPE B
1
1
UPPER PLATE
B
A
F
E
2
LOWER FACE MIRROR
POLISHED
3
D1
C1
1
F1
LOWER PLATE
B1
1
1
A1
2
ØA
E
G
E2
F
G
F1
2
Ø A1
1
3
123
Sliding Material : P.T.F.E.
General Description
PTFE has very good mechanical and chemical properties. Because it is corrosion resistant
and chemically inert it is unaffected by virtually all acids and caustics and functions in
environments to 250 Celsius degree; PTFE is inert, and its operating temperature range is
from minus 200 degrees Celsius to 280 degrees Celsius. Glass filled PTFE can be cut or
stamped into bearing pads, and will resist all weather-related degradation while remaining an
inert interface between disparate construction materials, like steel and concrete. Various
fillers can be blended with the PTFE base resin to enhance certain properties, e.g. glass fiber,
glass bead, carbon, graphite, molybdenum disulfide, bronze, etc. PTFE does not melt; it
cannot be moulded into complex shapes, but must be machined. PTFE is easily machined
using standard mechanical woodworking and stamping equipment and tooling. Most shapes
are sold slightly oversized for easy trimming and machining to exact sizes.
Features:
- Very good mechanical, antistatic & dielectric properties
- Good bending resistance
Very high corrosion resistance to Acid & Caustic (except fluorine, fluorochemicals & molten alkali metals)
- Good resistance to Temperature
- Low Friction coefficient
Applications:
- Heating applications
- Low friction application
- Other applications with high mechanical and corrosion resistance requirements
Mechanical Characteristics
Sym Parameter
bol
Tensile strength @25°C
σΤ
Elongation @25°C
ε
HD Hardness “D”
Static or kinetic coefficient
Certificato Nr.
IT 248286
ASTM
Method
D638-52T
D1708
D676-49T
D2240
Min
Max
Units
(Note 2) (Note 2)
10
20
N/mm²
200
300
%
D50
D60
0,04
0,06
Best regards.
CA.S.T.IM. 2000 S.r.l.
Tec.
Gest.
App.
C.Q.
Amm
Direz.
Cap .Soc. € 105.000 – Registration Code Cuneo Chamber Nr.
10382/2000. R.E.A. n. 232805 – Fiscal Code / V.A.T. Nr. 02741540047
Physical Characteristics
Sym Parameter
bol
Density
ρ
Dielectric Strength –
Breakdown Volt.
Water-absorption
Coefficient of linear
thermal expansion @2550°C
Flammability
ASTM
Min
Max
Method (Note 2) (Note 2)
D792-50
2.1
2.2
D149-44
15
20
D570-42
Units
kg/dm³
kV/mm
>0,01
%
5
5,5 * 10^-
D696-44
D635-44
D-470
\
\
Note 1: Typical Values represent the most likely parametric norm.
Note 2: All limits are evaluated by testing or statistical analysis but are not guaranteed.
PTFE Sheet and Film..........................ASTM D 3293 & ASTM 3294 (and MIL-P22241). Describes the properties and
characteristics parameters for PTFE moulded sheets (thicker than .250 inches).
PTFE Molded Sheet or Shapes.........ASTM D 3294. Describes the properties and characteristics parameters for molded PTFE
shapes and molded PTFE sheets.
PTFE Skived Tape...............................ASTM D 3308. Describes the properties and characteristics parameters for skived tape
(.250 inches and thinner)
Filled Compounds made With PTFE…………………………….ASTM D 4745. Describes the properties and characteristics
parameters for filled molding compounds made with PTFE. The specification provides standards for bulk density, tensile strength
and elongation of PTFE filled with different percentages of glass fiber, glass fiber and Molybdenum Disulfide, graphite, carbon
and graphite, bronze, bronze and Molybdenum Disulfide and stainless steel.
Molding and Machining Tolerances for PTFE resin parts…........................ASTM 3297. This specification defines tolerances
applicable to parts molded and free sintered from PTFE resins and to machined parts produced from basic shapes of compression
molded or ram extruded resins. The thermal expansion of PTFE parts between 64F and 70F is non-uniform due to a critical
transition zone characteristic of PTFE resins.
Certificato Nr.
IT 248286
CA.S.T.IM. 2000 S.r.l.
Best regards.
Tec.
Gest.
App.
C.Q.
Amm
Direz.
Cap .Soc. € 105.000 – Registration Code Cuneo Chamber Nr.
10382/2000. R.E.A. n. 232805 – Fiscal Code / V.A.T. Nr. 02741540047
Sliding Material : CuSn6 - UNI EN 1652
Copper Tin Alloy
General Description
CuSn6 has very good mechanical and chemical properties. This binary alloy is made of
Copper alloyed with 6% Tin. Advantages of this product include a very high corrosion
resistance.
Features :
- Very good mechanical properties
- Good bending resistance
- Very high corrosion resistance
Applications :
- Heating applications
- Low friction application
- Other applications with high mechanical and corrosion resistance requirements
Mechanical Characteristics
Symbol
Parameter
σΤ
σ 1Ψ
ε
ΗΒ
Tensile strength
Yield strength at 1%
Elongation
Hardness
Min.
(Note 2)
470
380
25
Typ.
(Note 1)
500
420
40
110
Max
(Note 2)
530
460
50
Min
(Note 2)
Typ
(Note 1)
8.8
Max
(Note 2)
Units
N/mm²
N/mm²
%
Physical Characteristics
Symbol
Parameter
ρ
Density
Units
kg/dm³
Note 1: Typical Values represent the most likely parametric norm.
Note 2: All limits are evaluated by testing or statistical analysis but are not guaranteed.
Certificato Nr.
IT 248286
Best regards.
CA.S.T.IM. 2000 S.r.l.
Tec.
Gest.
App.
C.Q.
Amm
Direz.
Cap .Soc. € 105.000 – Registration Code Cuneo Chamber Nr.
10382/2000. R.E.A. n. 232805 – Fiscal Code / V.A.T. Nr. 02741540047
oil-less plate bearing
Sliding Plate Lower Side
Parameter
Typ. / Nr.
Sliding Material
CuSn6
Carbon Steel plate
S275JR or eq.
Max Compression strength
50
0,15
Dynamic Friction coefficient
Max. operation temperature
350
Hexagon socket Countersunk Type
M6*10
Hexagon socket Countersunk Material Cl. 8.8
Sliding Plate Upper Side
Parameter
Typ.
Material Name :
AISI 304
Surface condition of supply MIRROR POLISHED
(1 face )
Ra=40 ; Rz=1µ
General Supply condition
Parameter
Typ.
Tolerance :
+0/-1
Surface protection : (carbon Electrolytic zinc plate
Steel components)
Certificato Nr.
IT 248286
Units
UNI EN 1652
EN 10025
N/mm2
@ 25°C
°C
UNI EN 5933 DIN 7991
UNI 3740/3
Units
ASTM
Units
mm
UNI ISO 2081/89
Best regards.
CA.S.T.IM. 2000 S.r.l.
Tec.
Gest.
App.
C.Q.
Amm
Direz.
Cap .Soc. € 105.000 – Registration Code Cuneo Chamber Nr.
10382/2000. R.E.A. n. 232805 – Fiscal Code / V.A.T. Nr. 02741540047
Sliding Material : Graphite IS-64/M
General Description
Graphite has very good mechanical and chemical properties. Advantages of this product
include a very high corrosion & temperature resistance.
Features :
- Very good mechanical properties
- Very high corrosion resistance
- Very good resistance to high temperature
Applications :
- Heating applications
- Low friction application
- Other applications with high mechanical and corrosion resistance requirements
Mechanical Characteristics
Parameter
Tensile strength
Flexural strength
Compressive strength
Thermal conductivity
Thermal expansion
Elasticity modulus
Hardness
Porosity
Temp. resistance in oxidant atmosphere
Temp. resistance in reducing atmosphere
Units
N/mm2
N/mm2
N/mm2
W/mok
10-6/oK
MPa
Rockwell Hardness
%
°C
°C
Value
38
80
290
20
4
21000
115
<2,5
400
550
Units
gr./cm3
Value
2,55
Physical Characteristics
Symbol
ρ
Parameter
Density
Certificato Nr.
IT 248286
Best regards.
CA.S.T.IM. 2000 S.r.l.
Tec.
Gest.
App.
C.Q.
Amm
Direz.
Cap .Soc. € 105.000 – Registration Code Cuneo Chamber Nr.
10382/2000. R.E.A. n. 232805 – Fiscal Code / V.A.T. Nr. 02741540047
Sliding Plate Lower Side
Parameter
Sliding Material
Carbon Steel plate
Max Compression strength
Dynamic Friction coefficient
Max. operation temperature
Typ.
Graphite
S275JR or eq.
50
0,15
400-450
Units
\
EN 10025
N/mm2
@ 25°C
°C
Sliding Plate Upper Side
Parameter
Material Name :
Surface condition of supply
(1 face )
Typ.
AISI 304
MIRROR POLISHED
Ra=40 ; Rz=1µ
Units
ASTM
General Supply condition
Parameter
Tolerance :
Surface protection : (carbon
Steel components)
Certificato Nr.
IT 248286
Typ.
+0/-1
Electrolytic zinc plate
Units
mm
UNI ISO 2081/89
Best regards.
CA.S.T.IM. 2000 S.r.l.
Tec.
Gest.
App.
C.Q.
Amm
Direz.
Cap .Soc. € 105.000 – Registration Code Cuneo Chamber Nr.
10382/2000. R.E.A. n. 232805 – Fiscal Code / V.A.T. Nr. 02741540047
09/2007 - 1.000 - CFS (SAN)