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

PTFE Polytetrafluoroethylene

ASTM D 1457

White

PFA Perfluoro [Alkoxyalkane] copolymer

ASTM D 3307

Natural

FEP Perfluoro [Ethylene-Propylene]copolymer

ASTM D 2116

Natural

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 :

SIZELined Pipe IDFlare DiameterFlare Thickness
NBmmAs per ASTM F1545-95without RF mm
251847.614.5
403268.314.5
504287.316.5
8067117.518.5
10088150.818.5
150138203.223
200186255.623
250234311.225
300282365.133.6

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.

FluoropolymerTrade NamesMonomersMelting Point (°C)
PVF (polyvinylfluoride)Tedlar[7]VF 1200[8]
PVDF (polyvinylidene fluoride)Kynar [9] Solef [10] Hylar [11]VF 2175
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,
Neoflon (Daikin)
TFE327
PCTFE (polychlorotrifluoroethylene)Kel-F (3M), Neoflon (Daikin)CTFE220 [8]
PFA, MFA [12] (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[13] Neoflon (Daikin)
PPVE + TFE305
FEP (fluorinated ethylene-propylene)Sold by DuPont under the tradename Teflon FEP. Also known as Neoflon (Daikin)
and Hyflon
HFP + TFE260
ETFE (polyethylenetetrafluoroethylene)Sold by AGC under the trade name of FluonETFE [14] Tefzel [15]TFE + E265
ECTFE (polyethylenechlorotrifluoroethylene)Halar [16]CTFE + E 
FFPM/FFKM (Perfluorinated Elastomer
[Perfluoroelastomer])
Kalrez. [17] Tecnoflon PFR [18]  
FPM/FKM (Fluorocarbon
[Chlorotrifluoroethylenevinylidene fluoride])
Viton,[19] Tecnoflon FKM  
FEPM (Fluoroelastomer
[Tetrafluoroethylene-Propylene])
Sold by AGC under the trade name of AFLAS, [20]TFE + P 
PFPE (Perfluoropolyether)Sold by DuPont under the tradename Krytox.[21] Sold by Solvay Solexis S.p.A.
as Fomblin and Galden
  
PFSA (Perfluorosulfonic acid)Nafion  
Perfluoropolyoxetane   
PropertyMethod No.UnitsPTFEFEPPFAETFEECTFEPCTFEPVDF
Specific GravityD7922.172.152.151.71.71.71.78
Yield StrengthD638MPa101215.524314046
Yield StrengthD638PSI1,4501,7402,2503,4804,5005,8006,670
Elongation %200 – 500250 – 350300200 – 500200 – 30080 – 25020 – 150
Tensile ModulusD638MPa6005007001500165515002400
Tensile ModulusD638ksi8772.5101.5217.5240218348
HardnessD2240Shore D60576275759079
HDT, @ 66 PSID648°F250158164219240248300
HDT, @ 264 PSID648°F122129118160169239
Limiting Oxygen IndexD2863%>95>95>9530-36   
Dielectric ConstantD1501 MHz2.12.12.12.6