Does The Flanges Surface Have A Rough Effect On The Seal?

Does the Flanges surface have a rough effect on the seal?

Is the Flanges the surface smoother the better? In fact, this is not the case, this need to see where you are using, so the Flanges will have a different surface roughness, the following Flanges manufacturers to give you a detailed description of the staff.

Flanges surface roughness on the sealing effect of a great impact, especially when using non-soft gasket, the sealing surface roughness value is one of the main causes of leakage. For example, turning the Flanges surface of the knife is a spiral, the use of metal gasket, if the roughness value is large, the gasket can not be blocked knife blade formed by the spiral groove, under pressure, the media will It leaked down this trench.

The soft gasket has a much lower degree of smoothness on the Flanges surface, because it is easy to deform and can block the cutting edge, thus preventing leakage. On the soft gasket, the Flanges is too smooth but not bad, because at this time the interface leakage resistance becomes smaller.

Therefore, when we buy the Flanges can be used according to their own environment to confirm whether it is necessary to smooth or rough point, of course, you do not know where to consult the Flanges manufacturers of staff, we will give You provide the best use of the program.

Stainless steel Flanges, because the stainless steel has good corrosion resistance, so it can make the structural parts to maintain the integrity of the engineering design. The Flanges does not produce corrosion, pitting, corrosion or wear. Chromium-containing Flanges also provide mechanical strength and high elongation in one, easy parts manufacturing, can be satisfied with the needs of architects and structural designers. All metals react with oxygen in the atmosphere to form an oxide film on the surface. If holes are formed, the surface of the carbon steel can be secured by painting with a paint or an oxidation resistant metal, but, as is known, this protection is only a film.

Flanges in the use of the process include:

1, chrome Flanges pipe after the hardening of the American standard Flanges Flanges larger, prone to crack. If the same type of chromium stainless steel electrode (G202, G207) welding, must be more than 300 ℃ preheating and 700 ℃ after the slow cooling treatment. If the weldment can not be post-weld heat treatment, you should use the Flanges pipe electrode (A107, A207).

2, Flanges, in order to improve the corrosion resistance and weldability and the appropriate increase in the amount of stability elements Ti, Nb, Mo, etc., better than the chromium Flanges better. When using the same type of chromium Flanges electrode (G302, G307), should be more than 200 ℃ preheating and 800 ℃ after the tempering around the treatment. If the weldment can not be heat treated, you should use the Flanges fittings electrode (A107, A207).

3, in order to prevent the Flanges cover heating caused by eye corrosion, welding current should not be too much, less than about 20% of carbon steel electrode, the arc should not be too long, cold between the layers, narrow bead is appropriate.

4, the electrode should be used to dry, titanium calcium type should be dried at 150 ℃ for 1 hour, low a hydrogen type should be 200-250 ℃ drying 1 hour (can not be repeated drying, or easy to peel the skin peel), to prevent Welding paste oil and other dirt, so as not to cause the weld to increase the carbon content and affect the quality of welding.

5, Flanges pipe welding, by repeated heating precipitation of carbides, reducing corrosion resistance and mechanical properties.

6, low-pressure pipe can use the wire Flanges, more than 4 kg pressure using the welding Flanges, the electrode should have good corrosion resistance and oxidation resistance. Add a gasket between the two Flanges and tighten it with bolts. Different pressure Flanges have different thickness and use different bolts.