ERW steel pipe is also known as straight seam electric resistance welded steel pipe. As the name implies, resistance welding is a method in which pressure is applied through electrodes after the weldment is combined, and the resistance heat generated by the current passing through the contact surfac

The API standard stipulates that the inner and outer surfaces of the import and export oil casing shall not have folds, separations, cracks, and scars. These defects should be completely removed, and the removal depth should not be less than 12.5% of the nominal wall thickness. Oil casing must be fu

The anti-corrosion layer of the steel pipe should have the following properties:(1) Effective electrical insulation.(2) Good moisture and water resistance.(3) It has strong mechanical strength.(4) The anti-corrosion layer has good adhesion to the steel surface.(5) The material and construction proce

In addition to being used for oil extraction, the emergence of oil casing can also be used as a pipeline for transporting raw materials. To enhance the quality of oil casing, every link in the production process is particularly important, especially the temperature control during the period must be