1. Petrochemical: Crude oil, refined oil, petrochemical raw material, finished product delivery pipes, and oilfield pipe network.2. Natural gas: submarine and onshore long-distance pipelines; gas pipelines at gas receiving stations; gas fields and urban natural gas pipeline networks.3. Coal: transpo

The pressure ratio of the spiral steel pipe on the gas pipeline also tends to decrease gradually. For pipe diameter, pressure, and pressure ratio, optimization calculation and comparison are required. When the output is determined and the pipe diameter, pressure, and pressure ratio are determined th

1. The fixed-length spiral steel pipe may not be bundled.2. If there are threaded buckles at both ends of the spiral steel pipe, it should be protected by a thread protector. Apply lubricating oil or anti-rust agent to the threaded fasteners. Both ends of the spiral steel pipe are breached, and nozz

THREEWAY STEEL CO., LTDStanding stock of 20,000-30,000 tons, all stored in indoor warehouses, main materials: GR.B, ST52, 45mn, 16mn, 40Cr, 42CrMo, etc., main manufacturers: Baosteel, Jianlong, Baotou Iron and Steel, Valin, etc.