Overview

A Line Pipe is a high-strength steel pipe designed for transporting oil, gas, water, and other fluids over long distances. These pipes are manufactured in various diameters, thicknesses, and grades to meet high-pressure, temperature, and environmental conditions. Line pipes are essential in oil & gas pipelines, water transmission, offshore drilling, and industrial fluid transportation.

Key Features

High tensile strength for long-distance fluid transportation
Corrosion-resistant coatings for underground and offshore pipelines
Available in seamless, ERW (Electric Resistance Welded), and SAW (Submerged Arc Welded) types
Complies with international standards such as API 5L, ASTM, and ISO
Used in high-pressure and high-temperature environments

This guide will cover everything about Line Pipes, including manufacturing processes, specifications, applications, price trends, and suppliers.

Top Manufacturers in 2025

Choosing a trusted manufacturer ensures high-quality materials, precise manufacturing, and compliance with global standards. Below are some of the leading Line Pipe manufacturers:

1. Cangzhou Spiral Steel Pipes Group Co., Ltd

27 years of experience in steel pipe manufacturing
13 production lines for Φ219–Φ3500mm pipes
Annual production capacity: 400,000 tons
ISO 9001, API 5L, and ASTM-certified line pipes
Specialized coatings: 3LPE, FBE, and Epoxy Coal Tar

2. Tenaris (Global)

A world-class manufacturer offering high-performance Line Pipes for offshore and industrial pipelines.

3. Jindal SAW Ltd (India)

A major supplier of Line Pipes for pipeline transportation, marine industry, and infrastructure projects.

4. Baosteel Group (China)

A leading steel producer specializing in API 5L-certified Line Pipes for oil, gas, and water transmission.

5. Nippon Steel (Japan)

A global leader in high-strength, corrosion-resistant Line Pipes for extreme environments.

Each of these manufacturers ensures strict compliance with industry standards, guaranteeing high durability and performance.

Line Pipe vs Other Steel Pipes

Selecting the right pipe type depends on application, cost, and durability. Below is a comparison between Line Pipe and other steel pipes:

Feature	Line Pipe	Seamless Steel Pipe	ERW Steel Pipe	Spiral Welded Steel Pipe
Manufacturing Process	Welded or seamless	No welding (extruded from billets)	Electric Resistance Welding (ERW)	Submerged Arc Welding (SAW)
Strength	High	Very High	Medium-High	High
Diameter Range	Medium to Large	Small to Medium	Small to Medium	Large (up to 3500mm)
Wall Thickness	Medium to Thick	Thin to Medium	Thin to Medium	Medium to Thick
Cost	Cost-effective	Expensive	Affordable	Cost-effective for large diameters
Best Use Case	Oil & gas pipelines, water transmission	High-pressure, high-temperature pipelines	Structural, water, and gas pipelines	Water transmission, piling, structural applications

Why Choose Line Pipes?

Best for oil, gas, and water transmission
Complies with API 5L and ISO standards
Available in both seamless and welded forms
Durable and cost-effective for long-distance pipelines

Price Per Ton in 2025

The price of Line Pipes varies based on factors such as pipe grade, diameter, wall thickness, and coatings. Below is an estimated pricing chart for 2025:

Pipe Diameter (mm)	Wall Thickness (mm)	Steel Grade	Price Per Ton (USD)
219 – 600	6 – 10	API 5L B, X42	1,100−1,100 – 1,100−1,600
610 – 1200	8 – 14	X52 – X60	1,500−1,500 – 1,500−2,200
1220 – 1800	10 – 18	X65 – X80	2,000−2,000 – 2,000−2,800
2000 – 3500	12 – 25	X80 – X100	2,500−2,500 – 2,500−3,500

Factors Affecting Price:

Steel Grade – Higher-strength grades (X65, X80) cost more.
Pipe Diameter & Wall Thickness – Larger and thicker pipes require more material.
Coating Type – 3LPE, FBE, and other coatings increase costs.
Bulk Orders – Large quantity orders receive better pricing.

Cangzhou Spiral Steel Pipes Group offers high-quality Line Pipes at competitive prices.

Manufacturing Process & Quality Control

How Is Line Pipe Manufactured?

The manufacturing process of Line Pipe depends on whether it is seamless, ERW (Electric Resistance Welded), or SAW (Submerged Arc Welded). Each method ensures high-strength, durable pipes suitable for transporting oil, gas, and water. Below is a step-by-step breakdown of the Line Pipe manufacturing process:

1. Raw Material Selection

• Seamless Line Pipes start with solid steel billets, while ERW and SAW Line Pipes use hot-rolled steel coils or plates.
• The raw materials are selected based on API 5L, ISO, and ASTM standards.

2. Pipe Forming Process

For Seamless Line Pipe:

• The steel billet is heated and pierced to form a hollow tube.
• The tube is then stretched and rolled to achieve the desired diameter and thickness.

For ERW (Electric Resistance Welded) Line Pipe:

• A steel coil is unrolled and formed into a cylindrical shape.
• The edges are heated using high-frequency electric currents and welded together.

For SAW (Submerged Arc Welded) Line Pipe:

• A steel plate or coil is rolled into a cylindrical shape.
• The seam is welded using submerged arc welding (SAW), either longitudinally (LSAW) or spirally (SSAW).

3. Heat Treatment & Normalizing

• The pipe undergoes heat treatment to relieve stress and improve mechanical properties.
• Seamless pipes are normalized to enhance toughness and uniform grain structure.

4. Hydrostatic Pressure Testing

• Each pipe is tested under high-pressure water to ensure leak-proof performance.

5. Ultrasonic & Radiographic Testing

• Non-destructive testing (NDT) is used to detect internal or external defects in the weld seam.
• Ultrasonic, X-ray, and magnetic particle testing are applied based on pipe grade and specifications.

6. Coating & Anti-Corrosion Treatment

• Pipes can be coated with 3LPE, FBE, Epoxy Coal Tar, or Polyurethane coatings for enhanced corrosion resistance.

7. Final Inspection & Packaging

• Pipes are visually inspected, marked, and packed according to customer requirements.
• Each pipe is stamped with batch numbers, specifications, and manufacturer details for full traceability.

Why Line Pipes Are Preferred?

Manufactured with high-strength steel for durability
Available in various types (Seamless, ERW, SAW) to meet different needs
Leak-proof, corrosion-resistant, and pressure-tested for safety
Ideal for transporting oil, gas, water, and industrial fluids

Cangzhou Spiral Steel Pipes Group Co., Ltd follows strict quality control procedures to ensure high-performance Line Pipes.

Applications & Industry Uses

Where Are Line Pipes Used?

Line Pipes are widely used in industries requiring long-distance fluid transportation under high pressure and extreme environmental conditions.

Industry	Application	Why Line Pipes?
Oil & Gas Industry	Crude oil and natural gas pipelines	High strength, pressure-resistant, and corrosion-proof
Water Transmission	Potable water and sewage pipelines	Leak-proof, durable, and safe for drinking water
Marine & Offshore	Subsea pipelines, offshore drilling	Resistant to seawater and extreme marine conditions
Petrochemical & Refinery	Chemical and fuel transportation	Withstands high temperatures and aggressive chemicals
Power Plants	Cooling water systems, steam pipelines	High-temperature and pressure-resistant

Why Line Pipe is Ideal for Oil & Gas Pipelines?

API 5L-certified steel ensures high-quality performance
Available in large diameters for high-volume transport
Withstands extreme temperatures, pressures, and environmental exposure
Coated options (3LPE, FBE) provide superior corrosion resistance

Cangzhou Spiral Steel Pipes Group supplies customized Line Pipes for oil & gas, water transmission, offshore, and industrial applications.

Line Pipe Coating & Anti-Corrosion Treatment

To ensure long-lasting performance, Line Pipes can be coated with various anti-corrosion treatments.

Coating Type	Corrosion Resistance	Best Applications
3LPE Coating	Very High	Underground pipelines, oil & gas
FBE (Fusion Bonded Epoxy) Coating	High	Water pipelines, marine applications
Epoxy Coal Tar Coating	Excellent	Industrial chemical transport
Polyurethane Coating	High	Offshore & high-temperature environments

Why Coating is Essential ?

Increases pipeline lifespan by preventing rust and corrosion
Reduces maintenance costs and enhances safety
Protects against chemical exposure, seawater, and extreme temperatures

Cangzhou Spiral Steel Pipes Group provides custom coating services to meet industry-specific requirements.

Suppliers & Exporters

If you are looking to import Line Pipes, working with a reliable supplier ensures quality, competitive pricing, and timely delivery.

Top Chinese Exporters

Company Name	Location	Annual Production Capacity
Cangzhou Spiral Steel Pipes Group Co., Ltd	Hebei, China	400,000 tons
Baosteel Group	Shanghai, China	500,000+ tons
Tianjin Steel Pipe Co.	Tianjin, China	300,000 tons

Why Choose Cangzhou Spiral Steel Pipes Group ?

27 years of experience in steel pipe manufacturing
ISO 9001, API 5L, and ASTM-certified products
13 production lines, covering diameters from 219mm to 3500mm
Custom coatings and anti-corrosion treatments available
Strong export network to North America, Europe, and Asia

For high-quality Line Pipes, Cangzhou Spiral Steel Pipes Group Co., Ltd is a trusted supplier.

FAQ:

Question	Answer
What is it used for?	Used for oil & gas pipelines, water transmission, and industrial fluid transportation.
How does it compare to Seamless Pipe?	Seamless pipes are stronger but more expensive, while they are cost-effective for long-distance pipelines.
What is the lifespan of it?	40-80 years, depending on coating and environmental exposure.
Who is the best supplier?	Cangzhou Spiral Steel Pipes Group Co., Ltd is a leading supplier with ISO & API-certified products.
What is the price per ton in 2025?	Prices range from 1,100to1,100 to 1,100to3,500 per ton, depending on size and steel grade.
Can they be used for high-pressure applications?	Yes, especially API 5L X65 and above grades.
What coatings are available for them?	3LPE, FBE, Epoxy Coal Tar, and Polyurethane coatings.
Are they suitable for offshore drilling?	Yes, they are widely used in offshore oil and gas projects.

Final Thoughts

Line Pipes are essential for oil & gas, water transmission, and industrial fluid transportation. They offer high strength, durability, and cost-effectiveness for long-distance pipelines.

For premium quality Line Pipes, Cangzhou Spiral Steel Pipes Group Co., Ltd is your best choice in 2025!

Need a quote or more technical details? Contact Cangzhou Spiral Steel Pipes Group today!