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High-Performance DN1400 3PE-Coated LSAW Conduits for Strategic Gas Pipelines
Huayang's DN1400 LSAW pipes utilizing API 5L X70 steel and 3-Layer Polyethylene (3PE) provide the exceptional tensile strength and corrosion resistance for high-pressure gas transmission.
|
Technical Parameter |
Specification Value |
|
Material Grade |
API 5L X70 (L485) PSL2 |
|
Yield Strength |
≥ 485 MPa (70,300 psi) |
|
Tensile Strength |
≥ 570 MPa (82,700 psi) |
|
Outer Diameter |
1422.4 mm (DN1400 / NPS 56) |
|
Weld Process |
Double-Sided LSAW (JCOE) |
This ultra-large diameter piping solution ensures superior structural stability and impermeable external insulation, safeguarding critical transcontinental natural gas logistics in high-pressure environments.
Advanced Multi-Layer Integrity in Large-Scale Gas Infrastructure
Engineered for the rigorous demands of strategic energy corridors, Huayang's DN1400 API 5L X70 pipes feature a high-yield micro-alloyed steel body reinforced with a premium 3-Layer Polyethylene (3PE) coating system. The 1422.4mm LSAW sections are manufactured through the advanced JCOE cold-forming process and double-sided submerged arc welding, resulting in high dimensional precision and superior Charpy V-notch impact toughness for crack arrest. Following surface blast-cleaning to Sa 2.5 standards, the pipe is protected by a high-performance multi-layer shield consisting of a fusion-bonded epoxy primer, a copolymer adhesive, and a thick HDPE outer jacket. This configuration provides an impenetrable barrier against soil-induced chemical degradation and mechanical impact in diverse geological terrains. As a premier industrial specialist, Huayang subjects each DN1400 unit to stringent 100% ultrasonic inspection and high-pressure hydrostatic verification, offering a durable, high-integrity conduit that maximizes operational safety across expansive long-distance gas pipeline networks.
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