Product Description

Manufactured by seamless or welded process (ERW, LSAW, SSAW) from high-strength carbon steel, designed for crude oil, refined petroleum product, and natural gas transmission. Features high pressure resistance, excellent low-temperature toughness, good weldability, and uniform dimensional accuracy. Available grades: API 5L Gr B, X42, X46, X52, X56, X60, X65, X70, X80 (PSL1 / PSL2). Pipe type: seamless (OD 10.3–610mm), ERW (OD 21.3–610mm), LSAW (OD 406–1422mm), SSAW (OD 219–3048mm). Wall thickness: 1.5–60mm. Length: 6m, 12m, custom up to 18m. End finish: plain, beveled (for girth welding), or threaded with coupling. Surface finish: black (as-rolled), 3PE/FBE coated, or varnished. Manufacturing processes: hot finished/cold drawn seamless, high-frequency welded (ERW), JCOE/UOE (LSAW), spiral welded (SSAW). 100% hydrostatic testing and NDT (UT, MT, RT) per standard. Impact test temperature: -20°C to -46°C (grade/region dependent). Meets API 5L, ISO 3183, GB/T 9711. Custom lengths, corrosion protection coatings, and special end preparations available.

Parameter

Product Name	Oil Transmission Pipe (API 5L Line Pipe)
Material / Steel Grades	API 5L Gr B, X42, X46, X52, X56, X60, X65, X70, X80 (PSL1 / PSL2)
Pipe Type	Seamless, ERW, LSAW, SSAW
Outer Diameter (OD)	Seamless: 10.3 – 610 mm; ERW: 21.3 – 610 mm; LSAW: 406 – 1422 mm; SSAW: 219 – 3048 mm
Wall Thickness	Seamless: 1.5 – 40 mm; Welded: 3.0 – 60 mm
Standard Length	6 m, 12 m, custom up to 18 m
End Finish	Plain, beveled (for girth welding), threaded with coupling
Surface Finish	Black (as-rolled), 3PE coated, FBE coated, or varnished
Manufacturing Process	Seamless (hot finished/cold drawn), ERW (HFW), LSAW (JCOE/UOE), SSAW (spiral)
NDT Inspection	100% Hydrostatic test, Ultrasonic (UT); optional: RT, MT, ET
Impact Test Temperature	-20°C, -30°C, -46°C (grade and regional requirement)
Yield Strength (X70 PSL2)	485 – 635 MPa
Tensile Strength (X70 PSL2)	570 – 760 MPa
Elongation (X70)	≥ 18%
Standards	API 5L, ISO 3183, GB/T 9711
Custom Options	Length, coating (3PE, FBE), end bevel, special NDT, PWHT

Application description

Widely used in long-distance crude oil pipelines, refined product transmission lines (gasoline, diesel, jet fuel), natural gas transmission, and gathering pipelines in oil fields. Also suitable for offshore oil platforms, refinery interconnecting lines, and carbon dioxide transport. High strength, low temperature toughness, and pressure resistance ensure reliable operation in harsh environments.

Production description

Steel plate or coil is formed into pipe (seamless: pierced billet; welded: roll formed and welded). Pipe undergoes heat treatment (if required), is sized, 100% NDT inspected (UT and hydrostatic), and ends beveled for field welding. Corrosion coatings (3PE, FBE) are applied optionally.

Shipping Packaging

For export, oil transmission pipes are fitted with plastic end caps, bundled with steel straps, packed on steel skids or ISPM-15 pallets, and secured with edge protectors. Coated pipes receive additional moisture-proof polyethylene wrapping. Labels include grade, dimensions, length, coating type, and heat number for safe sea freight.

Why Choose Us?

1.Factory Strength: Direct manufacturer with integrated seamless, ERW, LSAW, and SSAW pipe mills, heat treatment facilities, and in-house coating lines (3PE, FBE), producing API 5L grades Gr B to X80 PSL2.

2.Quality Assurance: Strict control of chemical composition, mechanical properties (yield/tensile), low-temperature impact toughness, and NDT (100% UT and hydrostatic); compliant with API 5L, ISO 3183, GB/T 9711.

3.Certifications & Reports: Mill test certificates (MTC) with each shipment; third-party inspections (SGS, BV, DNV, Intertek) and impact/NDT reports available upon request.

4.Customization & Service: Wide grade range (Gr B, X42–X80), diameters 10.3–3048mm, wall 1.5–60mm, custom lengths (6–18m), end finishes (beveled, threaded), coatings (3PE, FBE, black varnish), and fast lead times.

5.Export Packaging: Plastic end caps + moisture-proof wrapping (for coated pipes) + steel strapping + steel skids/ISPM-15 pallets + edge protectors + clear labeling for safe sea freight and corrosion protection.

FAQ

1.How to store oil transmission pipes before installation?

Store on dry, level ground on wooden sleepers, keep pipes elevated. Maintain plastic end caps and moisture-proof wrapping for coated pipes. For non-coated ends, apply rust preventive oil if outdoor storage exceeds one month. Avoid heavy stacking that could deform pipes.

2.What is the difference between PSL1 and PSL2 in API 5L for oil pipelines?

PSL1 has basic requirements (no impact testing, limited NDT), suitable for low-pressure gathering lines. PSL2 has stricter chemistry, mandatory low-temperature impact tests (CVN), stricter NDT (100% UT), and higher toughness, required for long-distance high-pressure transmission lines, sour service, and cold regions. Most oil trunk lines use PSL2.

3.Can oil transmission pipes be field welded at low temperatures?

Yes, but special precautions are needed. Preheating to 100-150°C, using low-hydrogen electrodes, and maintaining interpass temperatures. For grades X70/X80, heat input control is critical to avoid HAZ softening. Low-temperature welding procedures (qualified per API 1104 or ISO 13847) should be followed. We provide WPS (Welding Procedure Specification) upon request for each grade.

CLIENT FEEDBACK

Has a professional foreign trade team and a well-established export service system. We have built long-term and stable cooperation relationships with customers from Southeast Asia, the Middle East, Africa, South America, and other regions.

CUSTOMER VISIT

We sincerely welcome global partners to contact us for mutual growth. With high-quality products and professional service, we look forward to working with you to create a prosperous future together.

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