Precautions for using stainless steel flange

Author : admin

Update time : 2022-02-11 15:33:50

When stainless steel flange pipe fittings are welded, carbides are precipitated by repeated heating, which reduces corrosion resistance and mechanical properties.
Chrome stainless steel flange pipe fittings have large hardenability after welding, and American standard flange is easy to crack. If the same type of chromium stainless steel electrodes (g202, G207) are used for welding, preheating above 300 ℃ and slow cooling treatment at about 700 ℃ after welding must be carried out. If the weldment cannot be subject to post weld heat treatment, stainless steel flange pipe fittings welding rods (A107, A207) .
Stainless steel flange, in order to improve the corrosion resistance and weldability, appropriately add an appropriate amount of stability elements Ti, Nb, Mo, etc., and the weldability is better than that of chromium stainless steel flange.
When the same type of chromium stainless steel flange electrode (G302, G307) is used, it shall be preheated above 200 ℃ and tempered at about 800 ℃ after welding. If the weldment cannot be heat treated, stainless steel flange pipe fittings welding rods (A107, A207) .
Stainless steel flange fittings and butt welding flange electrodes have good corrosion resistance and oxidation resistance. They are widely used in chemical industry, chemical fertilizer, petroleum and medical machinery manufacturing.

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