Stainless Steel 304 Flange Use Precautions

Stainless steel 304 flange use precautions. 1,In order to prevent stainless steel 304 flange cover heating and produce eye corrosion, welding current should not be too large, about 20% less than carbon steel welding rod, arc should not be too long, layer fast cold, with narrow welding path is appropriate.2. The electrode should be kept dry when used, titanium and calcium type should be dried by 150'C for 1 hour, and low a hydrogen type should be dried by 200-250 C for 1 hour (can not be dried repeatedly many times, otherwise the drug skin is easy to crack and peel off), to prevent the electrode drug skin. Sucse oil and other dirt to increase carbon content and affect the quality of welds.3. When the stainless steel 304 flange pipe fittings are welded, the carbide is precipitated by repeated heating to reduce the corrosion resistance and mechanical properties.4, Chrome stainless steel flange pipe fittings after welding hardening American standard flange is large, easy to produce crack. If the same type of chromium stainless steel welding rod (G202, G207) is used, preheating above 300 C and about 700 C after welding must be carried out. If the welding joint cannot undergo post-weld heat treatment, the stainless steel flange joint electrode shall be selected (A107, A207).5. Stainless steel 304 flange, in order to improve the corrosion resistance and soldability and appropriately increase the appropriate amount of stability elements Ti, Nb, Mo, etc., the soldering property is better than the chromium stainless steel flange. Using the same type of chromium stainless steel flange electrode (G302, G307), preheating above 200 C and tempering of about 800 C after welding. If the weld parts cannot be heat treated, the stainless steel 304 flange fittings shall be used (A107, A207).6, Stainless steel 304 flange pipe fittings, welding flange welding strip has good corrosion resistance and oxidation resistance, widely used in chemical, fertilizer, petroleum, medical machinery manufacturing.