Standard: GOST 10704-91，GOST 10705-80，GOST 10706Steel grade: K52 K55 K60 17G1S Ст17Г1СSIZE: 457mm-1422mm (18"-56")Product: LSAW Steel PipeUses the most advanced technology of JCOE LSAW steel pipe manufacture in the world, specializing in producing heavy caliber LSAW steel pipe. The product line adop

Large-diameter plastic-coated steel pipes are mainly made of spiral steel pipes or seamless steel pipes as the base material. It is not recommended to use straight seam welded pipes. Straight seam welded pipes are generally not as good at bearing pressure as spiral steel pipes, and the cost is highe

The high-frequency induction coil of the straight seam steel pipe should be as close as possible to the position of the extrusion roller. The internal stress of the steel pipe is small and evenly distributed, which can effectively prevent stress corrosion cracking, high dimensional accuracy, and fac

1. Compression type: Insert the pipe into the nozzle of the pipe fitting, fasten it with a nut, and use the screw force to compress the sleeve at the nozzle through the sealing ring, which acts as a seal and completes the connection of the pipe.2. Welding type: The end of the pipe is grooved, and th