PIASTRE DI SCORRIMENTO SLIDING PLATES

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2 PIASTRE DI SCORRIMENTO SLIDING PLATES 121

3 GENERALITA 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. Materiali: 1 - Acciaio (SJR 235 UNI/EN 10025:92) o equivalente 2 - Acciaio INOX (AISI 304) o equivalente 3 - T 200 C = PTFE 200 C < T 350 C = CuSn7 T > 350 C = Grafite INTRODUCTION 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 200 C = PTFE 200 C < T 350 C = CuSn7 T > 350 C = Graphite TYPE A TYPE B 1 1 A B UPPER PLATE F E 2 LOWER FACE MIRROR POLISHED 1 C1 D1 3 F1 LOWER PLATE B1 A Ø A E G E2 F 2 F1 G Ø A

4 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 bol Parameter ASTM Method Min (Note 2) Max (Note 2) Units σ Τ Tensile C D638-52T N/mm² ε C D % HD Hardness D D676-49T D50 D60 D2240 Static or kinetic coefficient 0,04 0,06 Certificato Nr. IT Best regards. CA.S.T.IM S.r.l. Direz. Tec. Gest. App. C.Q. Amm Cap.Soc Registration Code Cuneo Chamber Nr /2000. R.E.A. n Fiscal Code / V.A.T. Nr

5 Physical Characteristics Sym Parameter ASTM Min Max Units bol Method (Note 2) (Note 2) ρ Density D kg/dm³ Dielectric Strength D kv/mm Breakdown Volt. Water-absorption D >0,01 % Coefficient of linear thermal C D ,5 * 10^- 5 Flammability D \ \ 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 Describes the properties and characteristics parameters for molded PTFE shapes and molded PTFE sheets. PTFE Skived Tape...ASTM D Describes the properties and characteristics parameters for skived tape (.250 inches and thinner) Filled Compounds made With PTFE.ASTM D 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 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 Best regards. CA.S.T.IM S.r.l. Direz. Tec. Gest. App. C.Q. Amm Cap.Soc Registration Code Cuneo Chamber Nr /2000. R.E.A. n Fiscal Code / V.A.T. Nr

6 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 Min. Typ. Max Units (Note 2) (Note 1) (Note 2) σ Τ Tensile strength N/mm² σ 1 Ψ Yield strength at 1% N/mm² ε Elongation % ΗΒ Hardness 110 Physical Characteristics Symbol Parameter Min Typ Max Units (Note 2) (Note 1) (Note 2) ρ Density 8.8 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 Best regards. CA.S.T.IM S.r.l. Direz. Tec. Gest. App. C.Q. Amm Cap.Soc Registration Code Cuneo Chamber Nr /2000. R.E.A. n Fiscal Code / V.A.T. Nr

7 oil-less plate bearing Sliding Plate Lower Side Parameter Typ. / Nr. Units Sliding Material CuSn6 UNI EN 1652 Carbon Steel plate S275JR or eq. EN Max Compression strength 50 N/mm 2 Dynamic Friction coefficient 25 C Max. operation temperature 350 C Hexagon socket Countersunk Type M6*10 UNI EN 5933 DIN 7991 Hexagon socket Countersunk Material Cl. 8.8 UNI 3740/3 Sliding Plate Upper Side Parameter Typ. Units Material Name : AISI 304 ASTM Surface condition of supply (1 face ) MIRROR POLISHED R a =40 ; R z =1µ General Supply condition Parameter Typ. Units Tolerance : +0/-1 mm Surface protection : (carbon Steel components) Electrolytic zinc plate UNI ISO 2081/89 Certificato Nr. IT Best regards. CA.S.T.IM S.r.l. Direz. Tec. Gest. App. C.Q. Amm Cap.Soc Registration Code Cuneo Chamber Nr /2000. R.E.A. n Fiscal Code / V.A.T. Nr

8 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 Units Value Tensile strength N/mm 2 38 Flexural strength N/mm 2 80 Compressive strength N/mm Thermal conductivity W/m o k 20 Thermal expansion 10-6 / o K 4 Elasticity modulus MPa Hardness Rockwell Hardness 115 Porosity % <2,5 Temp. resistance in oxidant atmosphere C 400 Temp. resistance in reducing atmosphere C 550 Physical Characteristics Symbol Parameter Units Value ρ Density gr./cm 3 2,55 Certificato Nr. IT Best regards. CA.S.T.IM S.r.l. Direz. Tec. Gest. App. C.Q. Amm Cap.Soc Registration Code Cuneo Chamber Nr /2000. R.E.A. n Fiscal Code / V.A.T. Nr

9 Sliding Plate Lower Side Parameter Typ. Units Sliding Material Graphite \ Carbon Steel plate S275JR or eq. EN Max Compression strength 50 N/mm 2 Dynamic Friction coefficient 25 C Max. operation temperature C Sliding Plate Upper Side Parameter Typ. Units Material Name : AISI 304 ASTM Surface condition of supply (1 face ) MIRROR POLISHED R a =40 ; R z =1µ General Supply condition Parameter Typ. Units Tolerance : +0/-1 mm Surface protection : (carbon Steel components) Electrolytic zinc plate UNI ISO 2081/89 Certificato Nr. IT Best regards. CA.S.T.IM S.r.l. Direz. Tec. Gest. App. C.Q. Amm Cap.Soc Registration Code Cuneo Chamber Nr /2000. R.E.A. n Fiscal Code / V.A.T. Nr

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