China Seamless Steel Tube Manufacturer

Suzhou Seamless Steel Tube Works was founded in 1988, invested by Bao Steel. It now belongs to Double Gold Enterprise. With 20 years' professional practice in seamless steel pipe industry, the mill has been well recognized and respected by its clients, industrial fellows and 3rd party inspection organizations for its excellence in both products and services. We offer a wide range of seamless tube products, 80% of which were exported to 52 countries and regions all over the world.

Our factory has abundant technique force and we have a group of technical staff proficient in steel tube technology. Through its many years' experience, the factory has established a complete Quality Assurance System. We obtained Manufactory Certificate for high pressure boiler in 1995. Then, we earned "AAA" credit rating as well as ISO9002 certification in July, 2002. Accordingly, we were awarded PED, API, TS16949 and KR, LRS, DNV for our series of products.

We also have various kinds of complete and advanced detecting equipment systems to ensure the quality of our products, such as computer direct reading spectrometer, metallographic microscope, hardness testing machine, drop testing machine, universal testing machine, Eddy-current, and ultrasonic detector and so on.

  • ASTM A192
  • ASTM A192 The ASTM A192 belongs to the carbon seamless tubes, which is specially designed for high, middle, low pressure purpose in seamless carbon steel boilers and as super heater tubes. Chemical Composition of ASTM A192 seamless tube Grade Chemical Compo...
  • BS3059-II 360
  • BS3059-II 360 Boiler pipe refers to one of the seamless steel pipes. The method of manufacturing boiler tube is the same with seamless steel pipe,but this pipe has a requirement of the steel grades. Depending on the operating temperature, it can be divided into...
  • DIN1629 Pressure Boiler Tube
  • DIN1629 Pressure Boiler Tube The DIN1629 pressure boiler tube is wrapped with nylon fabric then bundled with 2 steel strips in each end, and other 2 in the middle. As an experienced China boiler tube manufacturer, we manufacture our seamless tubes according to ISO9001-2000, P...
  • JIS G3462
  • JIS G3462 JIS G3462 the alloy steel for boiler and heat exchanger tubes.By adopting chemical composition, the product can be divided in STB A12, STB A13, and STB A24,besides measures are taken to make sure there is no damage . All these alloy steels make . ...
  • JIS G3445
  • JIS G3445 JIS G3445, this japanese industrial standard specifies the carbon steel tubes,hereinafter referred to as the "tubes".And often we called this steel tube as "carbon steel tubes". STKM11A,STKM12A,STKM12B, ect...are contained in t...
  • JIS G3441 structural alloy steel tube
  • JIS G3441 structural alloy steel tube JIS G3441 is called structural alloy steel. This alloy steel is a practical and straight pipeline. This Alloy steel has much classes. Such as SCr420TK, SCM415TK and SCM418TK. The alloy steel is widely used in mechanical structure, natural gas, oil...

Main Products:

Boiler Tubes (Carbon Steel & Alloy Steel)

Tubes for Heat Exchanger

Tubes for Automotive

Precision Tubes

Tubing and Casing, Line Pipes

Tubes for Ship-building

Tubes for Fluid Transportation

Inner Threaded Tubes

Manufacturing Process:

Billet Inspection → Scale Removal → Acid Clean → Billet Cutting → Heating → Piercing →Forming Head → Acid Picking, Phosphating, Saponificationg → Cold Drawn → Heat Treatment → Mechanical Properties Inspection → Straightening → Cutting Ends → Surfance Treatment → Finish products Inspection Dimension and surface check, Eddy Current Test, Ultrasonic Test, Hydrostatic Test → Antirust treatment → Packing