L245M straight seam welded steel pipe specifications: Outer diameter 76mm~1420mm, wall thickness 3mm~80mm.
L245M straight seam welded steel pipe standards: GB/T9711, PSL1, PSL2 Steel pipes for oil and gas industry transportation systems.
L245M straight seam welded steel pipe manufacturing processes: SAW double-sided submerged arc welding steel pipe, HFW high-frequency straight seam welded steel pipe.

Chemical composition of L245M straight seam welded steel pipe: Carbon: ≤0.22%, Silicon: ≤0.5%, Manganese: ≤1.2%, Phosphorus: ≤0.025%, Sulfur: ≤0.015%, Vanadium: ≤0.05%, Niobium: ≤0.05%, Titanium: ≤0.04%. Mechanical properties of L245M straight seam welded steel pipe: Yield strength 245MPa~450MPa, Tensile strength: 115MPa~655MPa, Yield ratio ≤0.93.

For L245M straight seam welded steel pipe, the manufacturer shall establish and adhere to documented procedures to maintain traceability:
(1) Smelting number identification of L245M straight seam welded steel pipe. Until all relevant chemical analysis tests have been completed and the results meet the specified requirements;
(2) Test batch identification of L245M straight seam welded steel pipe. Until all mechanical property tests have been completed and the results meet the specified requirements. 
(3) For L245M straight seam welded steel pipes, manufacturers should establish and adhere to documented procedures to maintain furnace identification and testing records for all such pipes.
(4) Batch identification for L245M straight seam welded steel pipes. These procedures should provide methods for tracing back to the test batch, related chemical composition analysis, and mechanical property test results from any single pipe.

L245M straight seam welded steel pipes are widely used in various oil and gas transmission pipelines and building steel structures, including oil pipelines, natural gas, urban pipe networks, mine water and coal pipelines, mine coal slurry pipelines, high-voltage transmission lines, wind power, bridges, high-speed railway steel structures, etc.