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Large Diameter API 5L - 5CT Carbon Steel Spiral Welded Pipe

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High Strength · Multi-Standard Certified · Full-Scenario Engineering Solution

Product Overview

Manufactured by advanced LSAW & spiral forming technology, our large-diameter pipes comply with both API 5L (line pipe) and API 5CT (casing & tubing) standards - ideal for long-distance transmission and oil/gas well construction.

Key Advantages

Dual-Certified for Multi-Function

Certified to both API 5L and API 5CT - reducing procurement complexity for oil & gas transmission, casing services, structural applications, offshore pipelines, and urban networks.

Premium Carbon Steel & Enhanced Anti-Corrosion

Grades include Gr. B, X42-X70, J55-P110; options: 3PE, FBE, coal tar epoxy, cement lining, CRA cladding - suitable for sour service, subsea, permafrost, etc.

Double-Sided SAW with Full NDT

Automatic double-sided SAW for smooth welds and stable properties; 100% UT + RT on weld ends; PAUT/TOFD available.

Rigorous Testing & Full Traceability

Hydrostatic test, flattening, guided bend, Charpy V-notch, hardness, grain size, HIC/SSC on request; fully traceable from heat to final pipe.

Typical Applications

Field

Application

Standard

Oil & Gas Upstream

Well casing, surface casing, production tubing

API 5CT

Long-Distance Pipeline

Crude oil / product / gas trunk lines

API 5L PSL2

Urban Infrastructure

Heating networks, water mains, pile structures

API 5L / Structural

Offshore / Subsea

Submarine pipeline, riser, collapse-resistant casing

API 5L + coating

Geology & Mining

Grouting pipe, slurry transport, support piling

API 5CT / Custom

Production & Logistics

End Finishing:Plain / beveled, threaded or coupled (API 5CT threads)

Surface Protection:Bare, rust preventive oil, black paint, external coating (3PE/FBE, etc.)

Packaging:Steel strapping + end protectors + tarpaulin (pallet or bulk for sea freight)

Why Choose Us?

20+ years of large-diameter pipe manufacturing experience (JCOE, UOE, spiral lines)

Close to port - reduced inland logistics for full-length pipes

One-stop service: material selection → design optimization → coating → third-party inspection → international logistics

Products and company

Longitudinally Welded Steel PipesErw Black Steel Pipe

 

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