Modern urban gas transmission and distribution system is a complex integrated facilities, the main part of it is the gas pipe network. The cost of the pipeline laying takes up about 60% to 70% of the total cost of the project, of which the cost of pipe takes up about 60% of the cost of laying the pipe network. There are many types of pipes used for conveying gas, mainly includes steel pipe, cast iron pipe and PE plastic pipe and so on. We must be based on the nature of the gas, system pressure and construction requirements to choose, and should meet the mechanical strength, corrosion resistance, seismic and air tightness and other basic requirements.
Steel pipe is the most widely used pipe in gas engineering. In the field of urban gas, and even the entire gas field, steel pipe has played an irreplaceable important role. Its main advantages are: high strength, good toughness, bearing stress, impact resistance and tightness, good plasticity, easy welding and hot processing, thin wall thickness, and saving metal. But its corrosion resistance is poor, it needs to have proper anti-corrosion measures. The steel used in gas engineering is generally made of high quality mild steel (Q235) or low alloy steel (16Mn).
Steel pipe used for the city gas pipeline mainly contains seamless steel pipe and welded steel pipe two categories. Seamless steel pipe strength is high, but by the production process and cost constraints, we generally choose the small diameter steel pipe that diameter below DN200. There are many types of welded steel pipe, according to the welding method, it can be divided into straight seam welded steel pipe and SSAW steel pipe two categories. Among them, straight seam welded steel pipe includes straight seam double-sided submerged arc welding steel pipe (LSAW steel pipe) and high-frequency resistance welding steel pipe (ERW steel pipe) and others. SSAW steel pipe is a spiral seam double-sided submerged arc welding steel pipe. PRIME STEEL PIPE is the solution provider for steel pipes and fittings. We are dedicated in providing high performance-price ratio steel pipes and fittings for the oil, gas, construction, energy and petrochemical industries.
