Tension reduction rolling is the last hot rolling process in the production of seamless steel pipes, which plays a decisive role in the control of product quality.

UOE steel pipe forming process is one of the forming processes of LSAW steel pipe.The UOE production line adopts the Uing-Oing forming process. The formed steel pipe adopts five three-wire internal welding equipment and four three-wire external welding equipment.After welding, mechanical expansion or hydraulic expansion can be used to improve dimensional accuracy and remove internal stress according to user requirements.

Precision hydraulic seamless pipe is a precision hydraulic seamless steel pipe made of precision cold-drawn seamless steel pipe treated with black or gray phosphating process, and the phosphating steel pipe is sealed and rust-proof.

The drill pipe is a steel pipe with ribbing at the end, which is used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or bottom hole device at the bottom of the well. The purpose of the drill pipe is to transport the drilling mud to the drill bit and together with the drill bit raise, lower or rotate the bottom hole device.

High-frequency welding originated in the 1950s. It is a new welding process that uses the skin effect and adjacent effect generated by high-frequency current to connect steel plates and other metal materials. The emergence and maturity of high-frequency welding technology has directly promoted the huge development of the straight seam welded pipe industry, which is a key process in the production of ERW steel pipes. The quality of high-frequency welding directly affects the overall strength, quality level and production speed of welded pipe products

Alloy tubes are divided into structural seamless tubes and high-pressure heat-resistant alloy tubes. Mainly different from the production standard of alloy pipe and its industry, annealing and tempering of alloy pipe changes its mechanical properties and achieves the required processing conditions.