Choose the welding process1. Root weldingPre-heating before welding: X70 steel grade is higher and has a strong tendency to crack. It must be pre-heated before root welding, and the groove and its surroundings must be heated to 80-120°C before root welding. 2. Root welding: E6010 cellulose downward
Plastic-coated steel pipes, also known as plastic-coated pipes, steel-plastic composite pipes, and plastic-coated composite steel pipes, are based on steel pipes. A layer of plastic anti-corrosion layer or plastic anti-corrosion layer is fused to the inner surface of the steel pipe (bottom pipe) thr
Plastic-coated steel pipes not only have the advantages of steel pipes such as high strength, easy connection, and resistance to water flow impact, but also overcome the shortcomings of steel pipes that are prone to corrosion, pollution, and scaling when exposed to water, as well as the low strength
Anti-corrosion spiral steel pipes play an important and different role in people's daily lives. Anti-corrosion spiral steel pipes generally refer to the use of special technology to treat ordinary spiral steel pipes that have been anti-corrosion treated, so that the spiral steel pipes have certain a
Thick-walled steel pipes are stipulated in the project: the corresponding laws and regulations for the actual selection and use of thick-walled pipe fittings. When thick-walled steel pipes are selected or used, thick-walled pipe fittings must first comply with the corresponding laws and regulations,
1) Natural gas pipelines in operation: Remove accumulated water, light oil, methane hydrate, iron oxide, carbide dust, carbon disulfide, hydrosulfuric acid, and other corrosive substances inside the pipeline; reduce corrosion damage to the inner wall of the steel pipeline caused by corrosive substan
There are three connection methods for galvanized steel pipes:1. Rolling groove connectionRoll groove weld cracking:① Grind the welding bars on the inner wall of the pressure groove of the pipe mouth to reduce the resistance of the rolling groove;②Adjust the axis of the steel pipe and the rolling gr
Plastic-coated steel pipes, also known as plastic-coated pipes, steel-plastic composite pipes, and plastic-coated composite steel pipes, are based on steel pipes. A layer of plastic anti-corrosion layer or plastic anti-corrosion layer is fused to the inner surface of the steel pipe (bottom pipe) thr
(1) During the extrusion process, the temperature of the lining of the spiral steel pipe continues to increase as the extrusion process proceeds. At the end of the extrusion, the temperature in the area of the inner wall of the lining close to the extrusion die is relatively high, reaching 631°C. Th
Eccentric steel pipes are most likely to occur during the production process of hot-rolled steel pipes, and most of them occur during hot piercing: Based on the anatomical analysis of steel pipes rolled by automatic pipe rolling machines, we believe that the perforated capillary pipes are rolled by
