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 :
| SIZE | Lined Pipe ID | Flare Diameter | Flare Thickness |
|---|---|---|---|
| NB | mm | As per ASTM F1545-95 | without RF mm |
| 25 | 18 | 47.6 | 14.5 |
| 40 | 32 | 68.3 | 14.5 |
| 50 | 42 | 87.3 | 16.5 |
| 80 | 67 | 117.5 | 18.5 |
| 100 | 88 | 150.8 | 18.5 |
| 150 | 138 | 203.2 | 23 |
| 200 | 186 | 255.6 | 23 |
| 250 | 234 | 311.2 | 25 |
| 300 | 282 | 365.1 | 33.6 |
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.
| Fluoropolymer | Trade Names | Monomers | Melting Point (°C) |
|---|---|---|---|
| PVF (polyvinylfluoride) | Tedlar[7] | VF 1 | 200[8] |
| PVDF (polyvinylidene fluoride) | Kynar [9] Solef [10] Hylar [11] | 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, Neoflon (Daikin) | TFE | 327 |
| PCTFE (polychlorotrifluoroethylene) | Kel-F (3M), Neoflon (Daikin) | CTFE | 220 [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 + TFE | 305 |
| FEP (fluorinated ethylene-propylene) | Sold by DuPont under the tradename Teflon FEP. Also known as Neoflon (Daikin) and Hyflon | HFP + TFE | 260 |
| ETFE (polyethylenetetrafluoroethylene) | Sold by AGC under the trade name of FluonETFE [14] Tefzel [15] | TFE + E | 265 |
| 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 |
| Property | Method No. | Units | PTFE | FEP | PFA | ETFE | ECTFE | PCTFE | PVDF |
|---|---|---|---|---|---|---|---|---|---|
| Specific Gravity | D792 | – | 2.17 | 2.15 | 2.15 | 1.7 | 1.7 | 1.7 | 1.78 |
| Yield Strength | D638 | MPa | 10 | 12 | 15.5 | 24 | 31 | 40 | 46 |
| Yield Strength | D638 | PSI | 1,450 | 1,740 | 2,250 | 3,480 | 4,500 | 5,800 | 6,670 |
| Elongation | % | 200 – 500 | 250 – 350 | 300 | 200 – 500 | 200 – 300 | 80 – 250 | 20 – 150 | |
| Tensile Modulus | D638 | MPa | 600 | 500 | 700 | 1500 | 1655 | 1500 | 2400 |
| Tensile Modulus | D638 | ksi | 87 | 72.5 | 101.5 | 217.5 | 240 | 218 | 348 |
| Hardness | D2240 | Shore D | 60 | 57 | 62 | 75 | 75 | 90 | 79 |
| 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 |
