Gas Pipeline L245/L360 530*8 LSAW Steel Pipe

For natural gas pipeline construction, L245 and L360 steel grades are commonly selected due to their stable mechanical properties and reliable weldability. L245 steel typically provides a minimum yield strength of about 245 MPa, while L360 offers a higher yield strength of approximately 360 MPa, allowing pipelines to withstand internal pressure and operational stress during gas transportation. The chemical composition is controlled to maintain moderate carbon levels, usually below about 0.24 percent, with manganese content around 1.20 to 1.60 percent to enhance strength and toughness.

At Huayang Steel Pipe, 530×8 mm LSAW pipes are manufactured using high-quality hot-rolled steel plates and advanced JCOE forming technology to ensure accurate pipe geometry and consistent wall thickness. The longitudinal seam is welded using double submerged arc welding, which provides deep penetration and stable weld structure. Each pipe undergoes ultrasonic inspection of the base metal, weld seam non-destructive testing, and hydrostatic pressure testing to ensure reliable performance in natural gas transmission systems.