Hebei Huayang Steel Pipe Co., Ltd is one of the leading manufacturers and suppliers of lsaw gb/t 9711.1 x46 carbon steel pipe for coalbed methane transmission 660mm in China. Please feel free to buy cheap lsaw gb/t 9711.1 x46 carbon steel pipe for coalbed methane transmission 660mm from our factory. All customized products are with high quality and low price.
Product Specifications and Welding Quality Control
LSAW GB/T 9711.1 X46 carbon steel pipes are primarily employed in coalbed methane gathering and transportation systems, demanding stringent requirements for weld tightness, resistance to internal pressure, and low-temperature impact toughness. Huayang maintains stable production of large-diameter longitudinal submerged arc welded pipes meeting X46 strength grade specifications. From raw material coil stage, we implement mechanical property verification and full-plate UT inspection to ensure base material is free from laminations or crack hazards. The forming process employs UOE or JCOE techniques, ensuring weld joint gap, roundness, and curvature meet gas transmission pipeline standards. The double-sided submerged arc welding process enhances weld metal homogeneity. Post-weld UT and RT inspections are conducted alongside hydrostatic testing to ensure the pipes withstand fluctuating pressure conditions from coalbed methane wellheads to gathering stations. Products strictly adhere to GB/T 9711.1 PSL1 or PSL2 quality control requirements, with wall thickness, length, and end bevel specifications customisable per project needs.
Application Suitability in Coalbed Methane Extraction and Gathering Systems
X46 grade LSAW steel pipes are commonly employed in coalbed methane surface gathering pipelines, wellsite interconnections, gas-water mixed transport pipelines, and connection sections before and after dehydration stations. They are suited for medium-pressure applications with extended continuous operational cycles. Given the high water content and potential presence of corrosive media such as carbon dioxide in coalbed methane, Huayang offers solutions including internal epoxy coatings, external triple-layer PE coatings, or internal epoxy ceramic linings to enhance corrosion resistance and extend service life. This specification of steel pipe exhibits excellent weldability and on-site construction adaptability, enabling efficient integration with wellhead equipment, pressure regulation systems, and multi-site distribution nodes. Through dimensional stability and reliable weld performance, the product ensures the integrity and operational safety of coalbed methane gathering systems, providing dependable piping support for gas source development and enhanced energy utilisation efficiency.
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