Notices for Use of Stainless Steel Flange

　　1. In order to prevent interocular corrosion caused by Stainless Steel Flange cover heating, the welding current should not be too large, about 20% less than carbon steel electrode, the arc should not be too long, the Stainless Steel Flange interlayer cooling should be fast, and the narrow bead should be suitable.

　　2. When using the electrode, Stainless Steel Flange should be kept dry. The Ti-Ca type should be dried at 150 C for 1 hour. The low-a hydrogen type should be dried at 200-250 C for 1 hour (not repeatedly dried, otherwise the coating will crack and peel easily), so as to prevent sticking oil and other dirt on the electrode coating, so as to avoid increasing the carbon content of the weld and affecting the quality of the weld.

　　3. When stainless steel flange  is welded, carbides are precipitated by repeated heating, which reduces the corrosion resistance and mechanical properties.

　　4. The hardening flange of chromium stainless steel flanged pipe fittings is larger and easy to crack. If the same type Stainless Steel Flange of chromium stainless steel electrodes (G202, G207) are used for welding, Stainless Steel Flange is necessary to preheat above 300 and slow-cooling treatment around 700 after welding. If the weldments can not be heat treated after welding, stainless steel flanged pipe welding rods (A107, A207) should be selected.

　　5. SS316 PN40 DN50 6 Inch Stainless Steel Flange, in order to improve its corrosion resistance and weldability, appropriate addition of stability elements Ti, Nb, Mo, etc., has better weldability than chromium stainless steel flange. When using the same type Stainless Steel Flange of chromium stainless steel flange welding rods (G302, G307), Stainless Steel Flange should be preheated above 200 and tempered around 800 after welding. If the weldments can not be heat treated, stainless steel flanged pipe fittings welding rods (A107, A207) should be selected.

　　6. Stainless steel flange pipe fittings, butt welding flange electrode has good corrosion resistance and oxidation resistance, which is widely used in chemical industry, fertilizer, petroleum, medical machinery manufacturing.