Thick-walled steel pipes refer to steel pipes whose outer diameter and wall thickness ratio is less than 20 as thick-walled steel pipes. Mainly used as petroleum geological drilling pipe, cracking pipe for the petrochemical industry, boiler pipe, bearing pipe, and high-precision structural pipe for

Selection requirements for submerged arc steel pipes:1. For pipelines with high peak shaving requirements, due to the uneven gas consumption of users, frequent fluctuations in pipeline pressure, and great alternating stress on the steel pipe, the existing defects in the pipe will expand under the al

After the stainless steel pipes are packaged and bundled, they should be stored in a dry and clean environment without corrosive gases to avoid cluttered stacking with other items.Because the surface of stainless steel is relatively smooth and bright, and it is a metal product, it should be handled

(1) When the cooling is completed, that is, when the temperatures of the surface layer and the core part are all the same, the elastic deformation of the surface layer and the core part also disappears and returns to the original state. Although transient thermal stress is generated during the cooli