... , heat exchanger. We can supply all kinds of seamless steel pipes or tubes, boiler tube of pressure vessel, pipeline, heat exchangers ... 8-273mm Wall Thickness: 0.8-16mm.Standard and Steel Grade:Steel pipes/tubes of ASME, ASTM, JIS, GB, EN, DIN ... suitable for the steel tubes of the pressure vessel, the pipeline, the heat interchangers under low temperatures. Seamless carbon steel tubes/pipe, boiler tube ...