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Lined Pipe

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Lined Pipe Specification

Bend Radius
Defined by pipe diameter

Coating Type
Epoxy / Painted

Yield Strength
>250 MPa (Steel Pipe)

Sealing Type
PTFE Gasket

Connection Type
Flanged / Welded

Tensile Strength
>20 MPa (PTFE Lining)

Diameter
25 mm to 600 mm

Tolerance
1.5 mm

Flexibility
Rigid

Product Type
Lined Pipe

Material
Carbon Steel with PTFE (Polytetrafluoroethylene) Lining

Connection
Flanged / Welded

Shape
Round

Standard
ASTM F1545 / DIN 2848

Surface Treatment
Painted / Epoxy Coated

Outer Diameter
25 mm to 600 mm

Section Shape
Cylindrical

Length
Up to 6 meters

Color
Black / Blue / Custom

Usage
Chemical Transport, Corrosive Fluid Handling

Rated Pressure
up to 16 bar

Application
Chemical, Pharmaceutical, Water Treatment, Petrochemical Industries

Material Grade
A106/A53 (base pipe), Virgin PTFE (lining)

Flange Standard
ANSI B16.5 / DIN PN10, PN16

Internal Finish
Smooth (for reduced friction and chemical retention)

Minimum Order Quantity
1 Piece

Permeability
Low

External Finish
Glossy / Matt (as per specification)

Abrasion Resistance
Superior

Corrosion Resistance
Excellent due to PTFE lining

Density
2.16 g/cm3 (PTFE)

Fire Resistance
PTFE is flame retardant

Manufacturing Process
Extrusion and Lining Bonding

Packing Type
Bubble Wrap, Wooden Box

Inspection Method
Hydrostatic and Spark Test on lining

Electrical Insulation
High

About Lined Pipe

We are widely recognized as foremost organizations, which are engaged in manufacturing, exporting and supplying world class assortment of Lined Pipes. These pipes are manufactured using high grade material and progressive technology in adherence with the set industry norms. Available in various specifications, our offered Lined Pipes are highly praised by clients for their various unique features such as easy installation, smooth finish and optimum quality. Further, our clients can avail these pipes from us at market leading prices.

Housing Material Options

PIPE : 1. SEAMLESS CS ASTM A106 GR.B, SCH.-40, 2. ASTM A312 TP 304, SCH.-40
FLANGE : 1. IS 2062 / ASTM A105, 2. ASTM A351 GR. CF8

Lining Material Options

PFA - ASTM D 3307
FEP - ASTM D 2116
ETFE - ASTM D 3159
PVDF - ASTM D 3322
PP - ASTM D 4101
HDPE

Dimensional Data

ANSI #150 Flanged
SIZE	A (mm)	C(mm)	H(mm)	S (MIN.) (mm)	Approx Weight (Kg)
SIZE	A (mm)	C(mm)	H(mm)	S (MIN.) (mm)	FOR 1 Mtr.	Additional Kg./Mtr.
DN25-1	20.5	51	2.3	3.0	4.69	2.95
DN40-1 1/2	33.5	73	3.0	3.25	7.92	4.97
DN50-2	45.5	92	3.0	3.25	11.04	6.63
DN80-3	70.9	127	3.5	4.0	21.96	13.74
DN100-4	94	157	3.5	4.5-5.0	30.52	19.4
DN150-6	144.1	216	4.5	6.0-6.5	On Request	On Request
DN200-8	190.7	270	5.0	Consult Factory	On Request	On Request

Lined Pipe Vacuum Resistance (in inch of Mercury)
Material	Temp.	25 NB	40 NB	50 NB	80 NB 100 NB
	21c	Full	Full	Full	Full	Full
PTFE	100c	Full	Full	Full	Full	Full
	175c	Full	Full	Full	Full	Full
	21c	Full	Full	Full	Full	Full
PVDF	85c	Full	Full	Full	Full	Full
	135c	Full	Full	Full	Full	Full
PP	21c	Full	Full	Full	Full	Full
	95c	Full	Full	Full	Full	Full
HDPE	21c	Full	Full	Full	Full	Full
	65c	Full	Full	Full	Full	Full

Consult Hi-Tech Applicator for vacuum services. Special Heavy Duty PTFE Liners vailable for full vacuum. Details can be provided on request. Other Flange Drillings like, DIN 2632 / 2633 , BS 10 Table D, E or F are also available on request.
Max. Length available : 3 Mtr.
Tolerance : 3.5mm (0 to 1 Mtr.) and 5.0mm (1 to 3 Mtr.)
Clear ID for HDPE/PP Lined Pipes (DN/ID): 25/18 , 40/32 , 50/42 , 65/57 , 80/67

Superior Corrosion and Chemical Protection

The PTFE lining inside each pipe acts as a protective barrier against highly corrosive and reactive chemicals, ensuring long-term durability even with aggressive substances. This design guarantees minimal permeation and maximum safety for applications in chemical processing, water treatment, and pharmaceuticals.

Precision Manufacturing and Rigorous Quality Control

Our pipes are fabricated through advanced extrusion and bonding techniques and are thoroughly inspected with hydrostatic and spark tests. Each piece meets strict tolerances of 1.5 mm and is offered with customizable finishes and colors for specific project requirements, ensuring both reliability and consistency.

Versatile Applications and Custom Configurations

Compatible with ANSI and DIN flange standards and available in both flanged and welded connections, our lined pipes provide flexible integration for various systems. Whether for chemical, petrochemical, or pharmaceutical industries, these pipes guarantee optimal performance and easy installation, with a minimum order quantity of just one piece.

FAQs of Lined Pipe:

Q: How does the PTFE lining enhance the corrosion resistance of these pipes?

A: The virgin PTFE lining forms a seamless internal barrier that is inert to most chemicals, preventing corrosion and oxidation of the underlying steel, making these pipes highly reliable for transporting aggressive or corrosive fluids.

Q: What inspection methods are used to ensure the quality of the lined pipes?

A: Every pipe undergoes hydrostatic testing for pressure integrity and a spark test to confirm continuous, defect-free PTFE lining. These procedures ensure that no leaks or faults are present before delivery.

Q: When should I choose a PTFE lined pipe over a conventional steel or plastic pipe?

A: PTFE lined pipes are recommended when chemical compatibility, corrosion resistance, and low permeability are crucial, such as in chemical transport systems and environments dealing with aggressive fluids that could damage ordinary steel or plastic pipes.

Q: Where are these lined pipes commonly used?

A: These pipes are typically used in chemical processing plants, pharmaceutical manufacturing, petrochemical industries, and water treatment facilities where durability against hazardous chemicals and fluids is required.

Q: What is the process for manufacturing the PTFE lined pipes?

A: The pipes are produced using a combination of steel pipe extrusion, followed by precision lining with PTFE through bonding techniques. The finished pipe then receives painting or epoxy coating as specified, with strict dimensional and quality checks at each stage.

Q: What are the main benefits of using a PTFE lined pipe for fluid handling?

A: Key benefits include exceptional chemical and corrosion resistance, smooth internal surfaces that minimize product retention and friction, high electrical insulation, low permeability, and compliance with international standards for safety and performance.

Q: How are the pipes packed and shipped to ensure safety?

A: Each pipe is wrapped in bubble wrap and packed in sturdy wooden boxes to protect against mechanical damage during transit. This ensures that the product arrives in perfect condition, ready for installation.

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