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 under

Knowledge of thick-walled steel pipes:Thick-walled steel pipe, steel pipe with a ratio of the outer diameter of the steel pipe to the wall thickness is less than 20 is called a thick-walled steel pipe. Mainly used as petroleum geological drilling pipe, cracking pipe for the petrochemical industry, b

The most common connection method for large-diameter spiral steel pipes is welding, but in some projects, threaded connections, flange connections, socket connections, and groove connections are often used.Welding, flange connectionWelding and flange connection is traditional spiral steel pipe conne

Before the 3PE anti-corrosion steel pipe is buried, it is necessary to clean up the surrounding environment. The measurement and release personnel need to make technical disclosures to the commanders and mechanical operators who participate in the cleaning work, and at least one line of defense pers