Stainless steel PL flange components are one of the widely used and promoted flanges in the machinery industry, and are highly appreciated and supported by users. Stainless steel PL flange components are widely used, and their use range is determined by various characteristics. They are mainly used in mild media conditions such as low-pressure unrefined compressed air and low-pressure circulating water.

Stainless steel PL flange components commonly used large flanges include large flange welds and large flange butt welds. Stainless steel PL flange components have low stiffness and are suitable for pressure Pu003c4mpa. Large butt welding flanges are also called high neck large flanges. Large diameter flanges have high rigidity and are suitable for high pressure and high temperature applications.

Stainless steel PL flange components can be customized in a variety of materials. Precautions for use are as follows:

1. In order to prevent the PL flange components from being heated and corroding the eyes, the welding current should not be too large, which is 20? smaller than the carbon steel electrode. The arc should not be too long, and the cooling between layers should be fast. Fine beads are excellent.

2. The electrode should be kept dry during use. The perovskite type should be dried at 150°C for 1 hour, and the low-hydrogen type should be dried at 200-250°C for 1 hour (do not repeat the drying, otherwise the coating will easily crack and peel off). Prevent the welding rod coating from adhering to oil stains and other stains, increase the carbon content of the weld, and do not affect the surface quality of the weld.

3. When welding non-standard stainless steel PL flange components, repeated heating will cause carbides to precipitate, reducing corrosion resistance and mechanical properties.

4. The curable American standard flange of chromium stainless steel PL flange components becomes larger after welding and is more prone to cracking. When welding with the same type of chromium stainless steel electrode (G202, G207), it needs to be preheated to above 300℃, and slowly cooled to about 700℃ after welding. If the weld cannot be heat treated after welding, stainless steel non-standard flange pipe welding rods (A107, A207) should be used.

5. In order to improve the corrosion resistance and weldability of stainless steel PL flange components, appropriate amount of stabilizing elements Ti, Nb, Mo, etc. are added appropriately, and its weldability is better than that of chromium stainless steel non-standard flanges. When using the same type of non-standard chromium stainless steel flange electrode (G302, G307), preheat at least 200℃, and temper after welding to about 800℃. If the weld cannot be heat treated, stainless steel non-standard flange pipe welding rods (A107, A207) should be used.

6. Stainless steel PL flange components and butt welding flange electrodes have excellent anti-corrosion and anti-oxidation properties, and are widely used in the manufacture of chemicals, fertilizers, petroleum and medical equipment.