Seamless steel tubes — alloy steel tubes

GB/T5310-2008 seamless steel tube is a kind of high quality steel tube. The boiler tube is divided into general boiler tube and high pressure boiler tube according to its high temperature performance. High pressure boiler pipe is mainly used for manufacturing high pressure and above pressure steam boilers, pipes and other high-quality carbon structural steel, alloy structural steel and stainless heat resistant steel seamless steel pipe. [1] These boiler tubes operate at high temperature and pressure, producing high-temperature flue gas and water vapor, which are prone to oxidation and corrosion.

The steel grade

(1) High quality carbon structural steel steel 20G, 20MnG, 25MnG. 

(2) Alloy structure steel 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, etc. 

(3) Rust heat resistant steel commonly used 1Cr18Ni9, 1Cr18Ni11Nb boiler tube in addition to ensure chemical composition and mechanical properties, to do water pressure test, to make flaring, compression test. Steel tubes are delivered in heat treatment condition. 

In addition, the microstructure, grain size and decarburization layer of finished steel tubes are also required.

In addition to the high pressure boiler seamless steel tube GB/T5310-2008 mentioned above, our company’s main products are:

ASTMA210(A10M)-2012 Medium carbon steel boiler and superheater seamless steel pipe, the main material is SA210 GrA1,SA210GrC;

ASME SA106/SA-106M-2015, the main materials are GR.B gr.C;

ASME SA-213/SA-213M, common alloy material: T11, T12, T22 and T23, T91, P92, T5, T5b, T9, T21, T22, T17;

ASTM A335 / A335M – 2018, the main materials are: P11, P12, P22, P5, P9, P23,P91, P92, P2, etc.