... , heat exchanger. We can supply all kinds of seamless steel pipes or tubes, boiler pipe 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 ... This product is suitable for the steel tubes of the pressure vessel, the pipeline, the heat interchanger under low temperature. Seamless steel tubes/pipe