Fengmai Company sells stainless steel welded pipe industrial pressure pipelines with full specifications, including national and non-standard stainless steel welded pipe specifications, customized pipe diameters of 6-3500mm, and a stock of over 6000 tons. The production is fast, the delivery time is accurate, and materials can be processed. Fengmai Company has been focusing on the stainless steel pipe industry for 15 years. Your professional consultant for stainless steel seamless pipes is looking forward to cooperation!
When welding stainless steel pipes produced by Fengmai, various problems may be encountered, including welding defects, embrittlement of welding joints, stress corrosion cracking, welding hot cracks, etc.
Welding defects
During the welding process of stainless steel pipes, various defects may occur, such as incomplete penetration, incomplete fusion, burn through, undercutting, weld bead, etc. These defects may be caused by improper welding current, speed, groove size, or improper welding wire position. For example, incomplete penetration may be caused by too low welding current or too fast welding speed; Failure to fuse may be due to the metal in the molten pool being discharged towards the tail and forming a groove under the action of arc force, resulting in incomplete fusion; Burnout may be caused by excessive welding current or large groove gap; Bites and weld beads are also caused by improper welding parameters or operational errors.
Brittleness of welded joints
Fengmai stainless steel fittings may harden after welding, which may cause the joint to become fragile and prone to cracking. To prevent this situation, specific preheating and post weld heat treatment measures may need to be taken.
Stress corrosion cracking
Stainless steel pipes may face the risk of stress corrosion cracking after welding. This needs to be prevented through measures such as selecting materials correctly, adjusting the composition of the weld seam reasonably, and conducting post weld stress relief heat treatment.
Welding hot crack
During the welding process, welding hot cracks may form due to the influence of the chemical composition, microstructure, and properties of the material. This requires measures such as strictly controlling the content of harmful impurities, adjusting the microstructure and alloy composition of the weld metal to reduce the sensitivity of hot cracks
In addition, attention should be paid to protecting the eyes when welding stainless steel pipes, as improper welding operations may harm the eyes, especially for welding thin-walled stainless steel pipes.
In summary, a series of measures need to be taken when welding stainless steel pipes to prevent and solve the above problems, in order to ensure welding quality.
