sWe can supply all kinds of seamless steel pipes or tubes, boiler tubes of pressure vessels, pipeline, heat exchanger. We can supply all kinds of seamless steel pipes or tubes, boiler tube of pressure vessel, pipeline, heat exchangers. Outside Diameter: 8-273mm Wall Thickness: 0.8-16mm. Standard and Steel Grade:Steel pipes/tubes of ASME, ASTM, JIS, GB, EN, DIN and BS grades are all capable for us ...