Cangzhou Zhongrun Steel Tube Co.,Ltd is a large- scale enterprise engaged in producing , processing and sales steel pipes in North China.It is of convenient transportation as it is only 150 km away from Xingang,Tianjin,China.
The company maintains two subsidiary companies , which include Cangzhou Hengchang Steel Pipe Manufacturing Co.,Ltd and Cangzhou Tianyu Steel Pipe Manufacturing Co.,Ltd.
Our products mainly include seamless steel pipe, hot-finished steel pipe, longitudinal welded pipeand pipe fittings.
With powerful financial strength, advanced managerial concept, excellent marketing service, strict quality control system and the whole scientific method, we would like to develop together with your hand in hand.
| Production | ASTM A213 seamless steel pipe | ||||||||||
| Standard | ASTM A213 T12/T23/T24/T91 | ||||||||||
| Process of manufacture | As-rolled,Heat-treated | ||||||||||
| Chemical composition | Steel grade | C(%) | Mn(%) | P(%)≤ | S(%)≤ | Si(%)≤ | Cr(%) | Mo(%) | |||
| T12 | 0.05-0.15 | 0.3-0.61 | 0.025 | 0.025 | 0.5 | 0.8-1.25 | 0.44-0.65 | ||||
| T23 | 0.04-0.1 | 0.1-0.6 | 0.03 | 0.01 | 0.5 | 1.9-2.6 | 0.05-0.3 | ||||
| T24 | 0.05-0.1 | 0.3-0.7 | 0.02 | 0.01 | 0.15-0.45 | 2.2-2.6 | 0.7-1.1 | ||||
| T91 | 0.08-0.12 | 0.3-0.6 | 0.02 | 0.01 | 0.2-0.5 | 8.0-9.5 | 0.85-1.05 | ||||
| Tensile properties | Steel grade | Yield strength (Mpa) | Tensile strength(Mpa) | ||||||||
| T12 | ≥220 | ≥415 | |||||||||
| T23 | ≥400 | ≥510 | |||||||||
| T24 | ≥415 | ≥585 | |||||||||
| T91 | ≥415 | ≥585 | |||||||||
| Type of length | Fixed ruler and Double ruler | ||||||||||
| Application | Boiler, superheater and heat exchangers used in a seamless ferritic and austenitic alloy steel pipe. | ||||||||||
| Certification | ISO 9001-2002 ISO14001-2004 | ||||||||||
| Inspection and Test | Tensile test,Hydrostatic test,Non-destructive inspection and as agreed | ||||||||||
| Surface Treatment | Bare,Painting black,varnished,galvanized,anti-corrosion 3PE PP/EP/FBE coating or as agreeed | ||||||||||
Seamless Pipes Manufacturing Process
