PTFE Lined Pipe

Q: What is PTFE lined pipe and how is it made?

A carbon steel or stainless seamless pipe with a PTFE liner extruded from PTFE resin and fitted inside it, flared over the flange faces at each end. The steel carries the pressure and the bolt load; the liner takes the chemical attack. Because the liner is a separate extruded tube rather than a coating, it is thick enough to resist permeation and can be made in long spool lengths.

Q: Which pipe, flange and lining materials are available?

Pipe in carbon steel seamless to ASTM A106 Gr. B Sch. 40, or stainless. Flanges and collars from IS 2062 plate, ASTM A105, CF8 (SS 304) or CF8M (SS 316), in carbon or stainless steel. Liner extruded from PTFE resin to ASTM F1545-97 (2003), with HDPE, PP and polypropylene as alternatives. Lining thickness minimum 3.5 mm, 6.0 mm overall, with ±1.0 mm tolerance.

Q: What sizes, lengths, end connections and tests apply?

25 mm to 300 mm, in spool lengths up to 3000 mm. End connections with one flange fixed and the other loose, or both flanges fixed — a loose flange lets you rotate it to line up bolt holes on site. Flange dimensions DIN PN 10/16, BS 10, ASME 150/300 or mixed. Every spool is spark tested at 15 KVDC after lining and hydraulically tested at 20 kg/cm².

Q: Why does a lined system need venting?

Because fluoropolymers are slightly permeable. Over time traces of process gas work through the liner and collect between the liner and the steel shell, and with nowhere to go that pressure eventually collapses the liner inward. Vent holes in the shell let those permeated gases escape harmlessly, which is why venting is required on all lined systems. Do not plug or paint over the vents. Vent extensions 75 mm long are available for lagged systems so the vent still breathes through the insulation.

Q: Are you a manufacturer, and what are your minimum order quantity and customization options?

MVS manufactures at its own works — since 1978, ISO 9001:2015 certified — and exports across several continents. The minimum order quantity is 20 pieces. Made-to-length spools, stainless shells, HDPE and PP liners, mixed flange standards and vent extensions are built to order. Send us an isometric or line list and we will quote the spool schedule.

PTFE Lined Pipe Manufacturer

Mayur (Valves) System Private Limited, an ISO 9001:2015-certified company, has been a trusted PTFE Lined Pipe manufacturer and exporter since 1978. We specialize in supplying durable, corrosion-resistant piping solutions for demanding industrial applications. Our PTFE Lined Pipes are designed to handle aggressive chemicals, corrosive fluids, and challenging process conditions while supporting reliable and long-term performance. We export to 40+ countries worldwide, with a strong focus on consistent quality, timely delivery, and a smooth customer experience. Our products serve clients across Europe, North America, the Middle East, Southeast Asia, Russia, and other international markets, meeting diverse process piping requirements with dependable solutions and technical expertise. We offer premium-quality lined pipe systems designed for safe and long-lasting fluid transport in chemically aggressive and high-purity environments. Our PTFE-Lined Pipes combine the chemical inertness of virgin PTFE with the structural integrity of carbon steel or stainless steel, making them ideal for handling acids, alkalis, solvents, and other corrosive fluids.

Manufactured in sizes ranging from ½″ to 24″ (DN 15–600), these pipes are pressure-rated for ANSI Class 150/300 or PN 10–25, and operate reliably in temperatures between –40 °C to +230 °C. Fully compliant with ASTM F1545, ASME B16.5, and ISO standards, our PTFE lined pipes are vacuum-rated and tested to ensure zero leakage and absolute process integrity.

Our PTFE lined pipe systems are engineered using high-grade carbon steel or stainless steel, tailored to the demands of various industries like chemical processing, pharmaceuticals, acid manufacturing, wastewater treatment, and chlor-alkali plants. Each spool is internally lined with seamless, paste-extruded PTFE, offering superior permeation resistance and long service life even under severe operating conditions. Whether you require straight pipe spools or need integration with PTFE-lined fittings, valves, and instrumentation, MVS Valves delivers a comprehensive, high-performance solution that minimizes downtime and maximizes safety. If you’re looking for a reliable, corrosion-proof solution for aggressive fluids, choose MVS Valves—your go-to PTFE Lined Pipe Manufacturer with a proven track record of quality and innovation.

Category: PTFE Lined Pipe Fittings

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Specification

Specification	Details
Size Range	25 mm to 300 mm
Max Available Length	3000 mm
End Connection	One Flange Fixed and Other Flange Loose, or Both Flanges Fixed
Flange Dimensions	DIN PN 10/16, BS 10, ASME 150 / 300, Mixed
Lining	PTFE Liner Extruded from PTFE Resin as per ASTM F1545-97 (2003)
Lining Options	HDPE, PP, Polypropylene
Lining Thickness	Minimum 3.5 mm / 6.0 mm Overall (±1.0 mm Tolerance)
Lining Spark Test	15 KVDC After Lining
Hydraulic Test	20 Kg/cm² After Lining

Material of Construction

Pipe Material	Carbon Steel Seamless Pipes conforming to ASTM A106 Gr. B, Sch. 40 Stainless Steel ASTM A312 TP 304 / 316, Sch. 40
Flanges & Collars	IS 2062 Plates, ASTM A105 CF8 (SS 304), CF8M (SS 316) Carbon Steel, Stainless Steel
Vent Extensions	75 mm Long (Optional, for lagged systems)
Venting Details	Required on all lined systems to release permeated gases: Pipes < 500 mm: 2 Central Holes Pipes ≥ 500 mm: 4 Holes (2 at each end)

Application Industries

Crude Oil & Natural Gas Industry

Chemical & Petrochemical Industry

Water & Wastewater Treatment

Nuclear & Thermal Power Generation

Food & Beverage Industry

Pharmaceutical & Biotechnology

Pulp & Paper Industry

Mining & Mineral Processing

Marine & Shipbuilding

HVAC & Building Services

Automotive & Paint Chemical Manufacturing

Environmental & Bio Gas Renewable Energy

Steel & Metal Processing

Fertilizer Plants, Polymer Production

Cosmetics & Personal Care

Cement & Construction

Chlor-Alkali Industry

Mineral Acids Industry

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PTFE Lined Pipe

Frequently Asked Questions

Can’t find your duty condition here? Send us the media, size, pressure and temperature and we will specify the valve. Contact us

What is PTFE lined pipe and how is it made?

A carbon steel or stainless seamless pipe with a PTFE liner extruded from PTFE resin and fitted inside it, flared over the flange faces at each end. The steel carries the pressure and the bolt load; the liner takes the chemical attack. Because the liner is a separate extruded tube rather than a coating, it is thick enough to resist permeation and can be made in long spool lengths.

Which pipe, flange and lining materials are available?

Pipe in carbon steel seamless to ASTM A106 Gr. B Sch. 40, or stainless. Flanges and collars from IS 2062 plate, ASTM A105, CF8 (SS 304) or CF8M (SS 316), in carbon or stainless steel. Liner extruded from PTFE resin to ASTM F1545-97 (2003), with HDPE, PP and polypropylene as alternatives. Lining thickness minimum 3.5 mm, 6.0 mm overall, with ±1.0 mm tolerance.

What sizes, lengths, end connections and tests apply?

25 mm to 300 mm, in spool lengths up to 3000 mm. End connections with one flange fixed and the other loose, or both flanges fixed — a loose flange lets you rotate it to line up bolt holes on site. Flange dimensions DIN PN 10/16, BS 10, ASME 150/300 or mixed. Every spool is spark tested at 15 KVDC after lining and hydraulically tested at 20 kg/cm².

Why does a lined system need venting?

Because fluoropolymers are slightly permeable. Over time traces of process gas work through the liner and collect between the liner and the steel shell, and with nowhere to go that pressure eventually collapses the liner inward. Vent holes in the shell let those permeated gases escape harmlessly, which is why venting is required on all lined systems. Do not plug or paint over the vents. Vent extensions 75 mm long are available for lagged systems so the vent still breathes through the insulation.

Are you a manufacturer, and what are your minimum order quantity and customization options?

MVS manufactures at its own works — since 1978, ISO 9001:2015 certified — and exports across several continents. The minimum order quantity is 20 pieces. Made-to-length spools, stainless shells, HDPE and PP liners, mixed flange standards and vent extensions are built to order. Send us an isometric or line list and we will quote the spool schedule.

PTFE Lined Pipe