All carbon steel pipes used at low temperatures (less than -20°C) should adopt the GB6479 standard, which only specifies the requirements for low temperature impact toughness of materials.

GB3087 and GB5310 standards are standards specially set for boiler steel pipes. “Boiler Safety Supervision Regulations” emphasizes that all pipes connected to boilers are within the scope of supervision, and the application of their materials and standards should comply with the “Boiler Safety Supervision Regulations”. Therefore, boilers, power plants, heating and petrochemical production equipment use The public steam pipelines (supplied by the system) should adopt GB3087 or GB5310 standards.

It is worth noting that the price of steel pipes with good quality steel pipe standards is also relatively high. For example, the price of GB9948 is nearly 1/5 higher than that of GB8163 materials. Therefore, when selecting steel pipe material standards, it should be comprehensively considered according to the conditions of use. It must be reliable and reliable. To be economical. It should also be noted that steel pipes according to GB/T20801 and TSGD0001, GB3087 and GB8163 standards shall not be used for GC1 pipelines (unless ultrasonically, the quality is not lower than L2.5 level, and can be used for GC1 with design pressure not greater than 4.0Mpa (1) pipeline).