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How to Protect Stainless Steel Pipes During the Welding Process?
Stainless steel pipes often require welding during use. To ensure their performance, especially in special work environments, protection measures are necessary. Here's how to protect stainless steel pipes during welding:
1. Storage: Store stainless steel pipes in a dedicated warehouse, separate from carbon steel pipes. Prevent moisture, impacts, and contamination from iron metals.
2. Welding Surface: Use a dedicated workshop or wooden boards to avoid direct contact between stainless steel and carbon steel platforms.
3. Lifting: Use specially protected steel ropes for lifting to prevent direct contact between stainless steel and carbon steel ropes.
4. Welding Tools: Use stainless steel-specific tools like wire brushes and slag hammers. Do not mix grinding wheels used on stainless steel with those used on carbon steel.
5. Special Tools: Ensure that tools used for processing stainless steel are not used for carbon steel.
6. Marking and Damage: Do not use steel needles or paint to mark stainless steel pipes. Use chlorine-free ink for marking. Any damage such as weld spatter, arc strikes, soot stains, and mechanical scratches must be thoroughly removed (using rough grinding wheels followed by polishing). For welding, use tungsten inert gas (TIG) welding, with argon gas protection for single-sided welding, ensuring double-sided formation. For pipe-to-flange or non-butt joint welding, use manual tungsten inert gas welding, while pipe-to-sleeve joints should use manual arc welding.