SPECIFICATIONS FOR CS PTFE LINED PIPE,
FITTINGS AND VALVES
This specification covers factory made PTFE lined metal pipe, fittings & valves primarily intended for conveying corrosive fluids. All the technical specifications of our PTFE / PFA / FEP lined piping systems generally exceeds the relevant ASTM F 1545-95 Standard specifications. This specification covers ANSI 150# PTFE lined pipe & fittings in nominal diameter from 25NB to 400NB.
Material of Construction : CS PTFE / PFA / FEP lined
Pipe & Fittings material : ASTM A106 Gr.B, in compliance with ANSI B 36.10.According to schedule 40 from 25NB to 150NB, schedule 30 from 200NB to 250NB & schedule 20 for 300NB.
Flange Material : IS 2062 plate flanges ANSI B16.5, ASA 150# for drilled holes, ASTM A 105 COLLAR TYPE 150#
Valve Body Material : WCB casting as per ASTM A 216 WCB SS304 casting as per ASTM A 351 Grade Cf8 SS316 casting as per ASTM A 351 Grade CF8M
PTFE liner for pipes : Isostatically Moulded / Paste Extruded or Ram Extruded liner with even pressure throughout the length, molded from standard resin as per ASTM D1457, White color
Lined Fittings : Fittings are lined with RAM extruded Pipes made from from standard resin as per ASTM D1457.
Lined Valves : Valves are lined with PTFE / PFA / FEP.
Lining Material – Resin Type
Standard Resin Specification
Standard Liner Color
ASTM D 1457
PFA Perfluoro [Alkoxyalkane] copolymer
ASTM D 3307
FEP Perfluoro [Ethylene-Propylene]copolymer
ASTM D 2116
Lining Thickness : 3 to 8 mm from 25NB upto 400NB depends on size & location
Standard for Pipe : Collared ends with backing flange as per ANSI B16.5 ASA150#, one end loose flange and other end fixed flange.
Standard for fittings : All fittings are with fixed welded flanges, loose flanges can be offered on extra cost.
Vents holes : Each pipe having two vent holes that will release any pressure between the liner and the housing.
Tolerance for pipe length : ± 3.2mm.
Tolerance for flange bolt hole : ± 1.6mm
Inspection and testing : Pipes and fittings are tested with a non-destructive high voltage tester at an output voltageof 10KV and hydrostatic pressure test at 10 Kg/cm2, ball valves are tested at air pressure of 2Kg/cm2.
Pressure Rating : Vacuume to 06 kg/cm2
Temperature. Rating : – 29°C to 260°C
External Finish : Pipes and fittings are paint externally by red oxide primer and valves are paint externally with two coats of paint
Bore size (ID), flare diameter and flange thickness :
|SIZE||Lined Pipe ID||Flare Diameter||Flare Thickness|
|NB||mm||As per ASTM F1545-95||without RF mm|
Packing : Both ends of pipe are packed with good quality ply tightened with set of nut and bolts, fittings are packed with corrugated paper packing.
PROPERTIES OF FLUORO POLYMERS.
|Fluoropolymer||Trade Names||Monomers||Melting Point (°C)|
|PVF (polyvinylfluoride)||Tedlar||VF 1||200|
|PVDF (polyvinylidene fluoride)||Kynar  Solef  Hylar ||VF 2||175|
|PTFE (polytetrafluoroethylene)||Sold by AGC under the tradename Fluon PTFE; Sold by DuPont under the tradename
Teflon; sold by Solvay Solexis under the tradenames Algoflon Hyflon and Polymist,
|PCTFE (polychlorotrifluoroethylene)||Kel-F (3M), Neoflon (Daikin)||CTFE||220 |
|PFA, MFA  (perfluoroalkoxy polymer)||Sold by AGC under the tradename Fluon PFA. Sold by DuPont under the tradename
Teflon. Sold by Solvay Solexis under the tradename Hyflon Neoflon (Daikin)
|PPVE + TFE||305|
|FEP (fluorinated ethylene-propylene)||Sold by DuPont under the tradename Teflon FEP. Also known as Neoflon (Daikin)
|HFP + TFE||260|
|ETFE (polyethylenetetrafluoroethylene)||Sold by AGC under the trade name of FluonETFE  Tefzel ||TFE + E||265|
|ECTFE (polyethylenechlorotrifluoroethylene)||Halar ||CTFE + E|
|FFPM/FFKM (Perfluorinated Elastomer
|Kalrez.  Tecnoflon PFR |
|Viton, Tecnoflon FKM|
|Sold by AGC under the trade name of AFLAS, ||TFE + P|
|PFPE (Perfluoropolyether)||Sold by DuPont under the tradename Krytox. Sold by Solvay Solexis S.p.A.
as Fomblin and Galden
|PFSA (Perfluorosulfonic acid)||Nafion|
|Elongation||%||200 – 500||250 – 350||300||200 – 500||200 – 300||80 – 250||20 – 150|
|HDT, @ 66 PSI||D648||°F||250||158||164||219||240||248||300|
|HDT, @ 264 PSI||D648||°F||122||129||118||160||169||–||239|
|Limiting Oxygen Index||D2863||%||>95||>95||>95||30-36|
|Dielectric Constant||D150||1 MHz||2.1||2.1||2.1||2.6|