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1, please measure the outer circumference of the head. 2, please do a good mark on the cylinder and head. 3, according to the order of positioning welding, 4, positioning welding is completed, the welding. 5. Pay attention to the protection of the stainless steel head surface 6. After the head and the cylinder group welding, the welding seam, heat affected zone and the surrounding welding slag, splash, pollutants, and PT inspection and surface pickling should be promptly cleaned. 7. To prevent the stainless steel head surface bump scratch. 8. Do not store in the open, anti-rain. 9. Avoid forced welding. Structural design to prevent binding stress is too large. 10. Hydrostatic test water chloride ion content of not more than 25mg / L, after the test should be promptly dried. 11. Stainless steel pickling can not use hydrochloric acid and other reducing acids. 1. Head of the occasion to use the point of attention 2. Carbon steel head in nitrate, ammonia, alkaline sodium and other environmental cracks occur, please order the head seal when the elimination of residual stress. 3. Austenitic stainless steel chloride stress in the specific circumstances of stress corrosion cracking occurs, please select the appropriate design materials. 4. To be hot-dip galvanized or aluminized carbon steel containers, please do first heat treatment to remove residual stress.
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