Stainless steel flange

Since the stainless steel flange has good corrosion resistance, it can keep the structural parts for long time to maintain the integrity of the engineering design. The chrome stainless steel stamping flange also integrates mechanical strength and high extensibility. It is easy to manufacture parts and can meet the needs of architects and structural designers. Stainless steel flange material is asbestos rubber sheet, asbestos board, polyethylene plate, etc. It is also useful to use thin metal sheet (white metal and stainless steel) to wrap asbestos and other non-metallic materials into metal bag gaskets. There is also a wound gasket made of thin steel strip with asbestos tape.

The stainless steel flange is the part that connects the pipe to the pipe. A hole in the stainless steel flange flange. The bolt makes two flanges tight. All metals react with oxygen in the atmosphere to form an oxide film on the surface.

So what should stainless steel flange manufacturer pay attention to when producing?

Avoid substances that are easy to corrode stainless steel

The most important thing for the stainless steel material is to keep its surface clean. Once it has been corroded, the surface of the stainless steel will change its appearance and be less polished. So those things that have corrosive stainless steel capabilities are going away from production. Whether it's an acidic or alkaline gas or a liquid, you're going to move away from the production environment.

2. Select the matching gasket for the flange

The flange is very big in the connection of the pipe, but also the shadow of the gasket. The good helper of stainless steel flange is asbestos gasket. Asbestos the material itself has very good properties, it can resist acid, either gas or liquid can be well absorbed by asbestos, so as not to affect the stainless steel.

3. Flange production should take into account the connection

In there are different ways of connecting pipe, the pipe is thin can turn directly using the thread flange screw connection, some stainless steel flange facing some there is a big pressure pipeline, you will need to use to the welding, so that more solid and reliable.

Precautions for use

1. In order to avoid the corrosion of the eyeball due to the heating of flange cover, the welding current should not be too large. It is less than 20% of the welding rod of carbon steel. The arc should not be too long, and the interlayer is fast and cold, which is suitable for narrow welding.

2, electrode should be kept dry, when using titanium calcium type should be 1 hour after 150 ℃ drying, low hydrogen type a should be 1 hour after the 200-250 ℃ drying (can't repeat drying, otherwise coated easy cracking flake), to prevent the covering viscous oil and other dirt, lest cause weld increased carbon content and affects the quality of weldment.

3. During welding of stainless steel flange fitting, it is subjected to repeated heating and precipitation, reducing corrosion resistance and mechanical properties.

4. Chrome stainless steel flanged flanged flanged flanges are large and prone to cracks. If using the same type of chromium stainless steel electrode (G202, G207) welding, must be above 300 ℃ preheat and 700 ℃ or so slow cooling after welding. If the welding parts cannot be treated after welding, the stainless steel flanged tube welding rod (A107, A207) should be used.

5. Stainless steel flanges, suitable for improving the corrosion resistance and welding property, and properly increasing the moderate stability element Ti, Nb, Mo, etc., and the welding sex is better than the chromium stainless steel flange. Using the same type of chromium stainless steel flange welding electrode (G302, G307), should be above 200 ℃ preheat and around 800 ℃ tempering treatment after welding. If the welding piece cannot be heat treated, stainless steel flanged tube welding rod (A107, A207) should be used.

6. Stainless steel flange fittings, welding flange welding rod has good corrosion resistance and oxidation resistance, widely used in chemical, fertilizer, petroleum, medical machinery manufacturing.