ST52 Honed Seamless Steel Pipe for Hydraulic CylinderGB3087 Chinese national standardGB5310 Chinese national standardASME SA210 Boiler and pressure vessel code of ASMEASME SA213 Boiler and pressure vessel code of ASMEDINl7175 Deutsches industrial standard~Application:Used as the pipes on the heated side of low and medium pressure boilers(normally with operating pressure not higher than 5.88Mpa andoperating temperature below 450 oc);as the pipes on the heated sides of high·pressure boilers,economizers,overheaters,reheaters and pipesfor petrochemical industry(with the operating pressure above 9.8Mpa and operating temperature ranging between 450~C~650~C1Specifications of major steel:Processing form | I.D.mm | Length | Straightness | I.D. tolerance | I.D. Roughness(RA) |
Cold-rolled | 30-100 | ≤12M | 0.3-1.0/1000 | H8-H10 | 0.4-1.6um |
Cold-drawn | 30-250 | ≤12M | H8-H10 | 0.8-1.6um |
Hone | 40-500 | ≤12M | H8-H9 | 0.4-0.8um |
SRB | 50-250 | ≤9M | H8 | 0.1-0.4um |
Delivery condition:BKS
Tube shall have a smooth internal and external surface consistent with cold working process, tube inner surface should be free from rust, scratches and other surface
irregularities.