Need to pay attention to when buying oil casing?
Writer： admin Time：2021-07-07 14:27 Browse：℃
1. It is necessary to check the product quality certificate issued by the petroleum casing production enterprise and the certificate number for the implementation of the production license;
2. It is necessary to buy from regular oil casing production companies as much as possible. The raw materials for these production oil casings are supplied by large steel plants, and the quality of oil casing is relatively guaranteed;
3` It depends on the surface quality and mark of the oil casing. Petroleum casing should be rolled on its surface with the trademark sign, factory name (or trademark) and diameter; and the original steel plant logo.
4` Pay attention to the observation, the surface of the oil casing is not allowed to bend, wall thickness and other defects. If the oil casing you purchase has the above problems, please pay attention.