Oil & Gas Transmission Line Pipe

Oil and gas transmission line pipe serves as core equipment for long-distance energy transportation, mainly applied in cross-region transmission of crude oil, natural gas, refined oil and other media. It is widely adaptable to complex working conditions including land, ocean, desert and alpine environments, acting as critical infrastructure material ensuring the stability of energy supply chains.

Products are manufactured in strict compliance with GB/T 9711 and API 5L international standards, covering three major categories: seamless steel pipes, longitudinal submerged arc welded pipes and spiral submerged arc welded pipes. Mainstream steel grades include L245, L360, X42, X52, X65, X70, X80 and other specifications. High-quality low-alloy line pipe steel is selected as raw material, with optimized microstructure through micro-alloying and thermo-mechanical controlled processing, delivering stable mechanical properties and excellent weldability.

Core product advantages are reflected in multiple aspects: high strength to withstand high-pressure transmission conditions and ensure pressure stability in long-distance transportation; high toughness to maintain good impact resistance in low-temperature environments and prevent brittle fracture risks; corrosion resistance suitable for conveying media containing corrosive substances like hydrogen sulfide and carbon dioxide. Combined with anti-corrosion coating treatments such as 3PE and FBE, it extends service life in buried and marine environments; high dimensional accuracy with precise pipe-end processing, qualified ovality and weld quality to ensure sealing performance in field welding and installation.

The manufacturing process adopts automatic forming and double-sided submerged arc welding technology, implementing full-process quality control including non-destructive testing, hydrostatic testing, tensile and impact performance testing to ensure stable performance of each single product. Specifications cover outer diameters from 50mm to 2500mm, wall thicknesses from 4mm to 60mm, with lengths customizable or produced in fixed sizes of 6m, 9m and 12m.

Application scenarios cover oil and gas field gathering and distribution networks, long-distance trunk lines, urban gas distribution, chemical park raw material transportation, submarine pipelines and other fields. With long design life, the products adapt to complex external conditions including soil stress, geological settlement and temperature fluctuations, balancing safety, stability and economy to meet high-standard requirements of global oil and gas energy transmission projects.