Steel pipes are divided into seamless steel pipes and welded steel pipes (seamed pipes).

Boiler tube is a kind of seamless tube. The manufacturing method is the same as that of seamless pipe, but there are strict requirements on the steel grades used for manufacturing steel pipes. According to the use temperature, it can be divided into general boiler tubes and high-pressure boiler tubes.

1) The steel grades of high-quality carbon structural steel are 20G, 20MnG and 25MnG.

2) Alloy structural steel grades 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, etc.

Seamless Steel Tubes for Low and Medium Pressure Boilers (GB3087-2008), Seamless Steel Tubes for High Pressure Boilers (GB5310-2008), ASME SA-106, ASME SA-213, ASTM A335

In addition, our company also operates seamless steel pipes for structures (GB/T 8162 8163), seamless steel pipes for petroleum cracking (GB9948), seamless steel pipes for high-pressure fertilizer (GB6479), oil pipeline pipes (API 5L) and oil casing pipes (API 5CT), and alloy pipe fittings.