Tempering is a heat treatment process in which a high-pressure boiler tube quenched into martensite is heated to a temperature below the critical point, held for an appropriate time, and then cooled to room temperature.

Seamless steel pipe is a kind of steel pipe manufactured by punching, rolling and drawing molding processes, and there is no weld on the surface, nor any welded joint.

Seamless steel pipe is an indispensable material for urban construction and pipeline transportation, with light weight, high temperature resistance, impact resistance and other performance characteristics.

API 5L Seamless pipe is a seamless steel pipe manufactured according to API 5L (American Petroleum Institute 5L specification), which is mainly used in oil, gas and other fluid transportation pipeline systems.

The seamless steel pipe is mostly produced by hot rolling and cold drawing process. In the cold drawing process, the seamless steel pipe often needs to be annealed.

Welded steel pipe is a common type of steel pipe in modern engineering applications, it has a unique manufacturing process and excellent comprehensive properties, and has been widely used in many fields.

As the global energy and chemical market demand continues to rise, the steel industry has ushered in a new breakthrough in seamless carbon steel pipe technology.

LSAW steel pipe is a type of steel pipe commonly used in modern engineering, it has a unique manufacturing process and excellent comprehensive performance, and has been widely used in many fields.

Pipeline welding is a comprehensive technology, including material preparation, selection of welding method, parameter setting of welding process, detection and treatment.

Stainless steel pipes have become a popular choice in many industries because of their corrosion resistance, durability and aesthetics, and the alloying elements in stainless steel pipes provide them with unique properties, making them extremely resistant to corrosion.

ASTM A270 Sanitary stainless Steel pipe is the standard specification for welded seamless, heavy cold work welded austenitic and ferritic stainless steel sanitary pipe.

Spiral steel pipe is a kind of welded steel pipe, is a common building material, suitable for the construction of Bridges, docks, tunnels, etc.

DIN 1629 is the standard for seamless round tubes of non-alloy steel with special quality requirements. It is a German standard that specifies the requirements for non-alloy steel seamless round steel pipes.

Hot rolled seamless pipe is made by calcination of billet at high temperature, perforation, rolling, sizing, straightening and other process steps.