What is the welding process of 20G high-pressure seamless steel pipes?

20G high-pressure seamless steel pipes are generally formed by forming processing technology, and the welding method generally uses double-sided arc welding and multi-wire welding. Pipeline automatic welding machine has the advantages of high efficiency of electric welding, low labor efficiency, and less harm from human error in the whole process of electric welding. It has great development potential in the application of large-scale and thick-walled pipelines. The bolt connection stipulates that the connection has high compressive strength and good sealing performance to avoid seamless steel pipe rupture and transportation material leakage.

20G high pressure seamless steel pipe has strong working pressure and good electric welding characteristics. Application of high-frequency lap welding and electric welding is used for pressurized fluid mechanics transportation. High-frequency welding is divided into roll-up and volumetric feeding methods, which are not prone to defects such as incorrect and incomplete penetration. The quality of electric welding is guaranteed. The electric welding temperature can be adjusted according to the electric welding rate. Countermeasures include high frequency and magnetic flux leakage inspection methods for crude oil and gas (immediate contact method and prepreg method), eddy current inspection and ultrasonic inspection. In addition to the way that the hydraulic machine expands the machine's abrasive tool size tolerance, the seamless steel pipe is in deep contact with the abrasive tool wall, and the sliding friction is small. In addition, the radial investment compensation effect of the four-column hydraulic machine can make each part of the pipe a uniform shrinkage rate. Prevents radial wall thickness deviation and partial internal stress.