First, the methods of cold galvanizing and hot galvanizing of galvanized steel pipes are different:1. Cold plating: It is a process of anti-corrosion treatment on the surface of workpieces through electrochemical principles.2. Hot-dip galvanizing: also known as hot-dip galvanizing, is a method in wh

Production temperature of straight seam steel pipe: In the process of producing straight seam steel pipe, the temperature must be strictly controlled, to ensure the reliability of welding. If the temperature is too low, it may cause the welding position to fail to reach the temperature required for

(1) The warehouse should be selected according to the geographical conditions. Generally, an ordinary closed warehouse is used, that is, a warehouse with a roof, a wall, tight doors and windows, and a ventilation device;(2) Do not stack together with acid, alkali, salt, cement, and other materials t

The spiral seam submerged arc welded steel pipe is drilled in rotation and begins to enter the soft formation. Under the action of the tritone, the drill bit first produces elastic shear deformation of the formation and then is removed under the pressure of the tritone. In the simulated environment,

The seamless stainless pipe is made by rolling, the rolling method involves piercing the material while it is being rolled, and is suitable for mass production. When the round billet is rotated while being compressed in the diametric direction, the central part of the billet becomes loose, which mak

1. The anti-embroidery treatment on the surface of the galvanized steel pipe is more durable, it will not oxidize too quickly, and will not form white rust on the steel pipe;2. Comprehensively protect the steel pipe. After heating, every part of the steel pipe is coated with zinc, and the concave an

The construction of cement mortar fabric should usually be carried out after the spiral steel pipe is laid, the pressure test is qualified, and the soil is compacted according to the design requirements. Because the steel pipe has small rigidity and a thin wall, the pipeline must be in a stable stat

First of all, it may be due to the stress of the spiral seam submerged arc welded steel pipe. That is, the residual stress and welding stress after the steel pipe is formed.Secondly due to the presence of hydrogen. If the flux is not dried enough, the preheating temperature is insufficient or the pr

After the oil casing adopts this heat treatment method, it can effectively improve the impact toughness, tensile strength, and anti-destruction performance of the oil casing, ensuring a good value in use. Oil casing is a necessary pipe for drilling oil and natural gas, and it must have good performa

The High-Frequency Longitudinal Seam Welded Steel pipe is also called EFW steel pipe, it's manufactured by cold-forming a sheet of steel into a cylindrical shape. High-security welding seam: as a result of the special welding method of melting the parent metal together without filler metal, the weld