- 规格:
- dn15-dn1220
National Standard for Straight Seam Elbows (Manager Liu Xiaolei) Compared with the installation of ordinary straight seam elbows, the assembly and installation of straight seam elbows have strict process requirements and high quality requirements. Therefore, before welding, the welder must undergo welding technology training and obtain the welding certificate for the corresponding project before he or she can work with the certificate. The installation plumber must also undergo training on the large-diameter stainless steel pipe installation process, understand its process characteristics, and be proficient in operating procedures and specifications. Only then can you take up the post. Before construction, it should be confirmed that sufficient pipe materials have been supplied and that the schedule requirements have been met. All main materials should be well packaged and accompanied by corresponding material quality certificates. They should be properly preserved and protected to prevent contamination. The appearance quality and geometric dimensions of the pipes should meet the requirements of the corresponding standards, and should be free of scratches, pits, cracks, excessive bends and other defects. . Materials that do not meet the requirements must be marked and recorded, and stored in isolation. As auxiliary materials, appropriate amounts of cerium tungsten electrodes, cotton yarn, special cooling oil for cutting and no less than . of argon
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