Butt welding flange is used for flange and pipe butt welding, its structure is reasonable, its strength and stiffness are large, can withstand high temperature and high pressure and repeated bending and temperature fluctuations, reliable sealing. The nominal pressure is zero. 25 to 2. The butt welding flange of 5MPa adopts a concave-convex sealing surface. The outside slope of the neck of the butt welding flange should not be more than 7o.

Technical parameters of butt welding flange are strictly controlled during production and welding to ensure that it can play its role and value fully in production and use. Butt welding flange is not easy to deform, sealed well, widely used, has the corresponding rigidity and elasticity requirements and reasonable butt welding thinning transition, welding distance from the joint surface is large, the joint surface from welding temperature deformation, it takes a more complex cough body structure, suitable for pressure or temperature fluctuations of the pipeline or high temperature, high pressure, and low-temperature pipeline, Generally used for PN greater than 2.5MPa pipe and valve connection; Also used to transport expensive, flammable, explosive medium pipeline.

Stainless steel butt welding flange ball valve connection:

1, first of all, the stainless steel butt welding flange ball valve body flange, according to a certain standard drilling standard eye distance hole, pipe joint end also welded with the same standard flange, bolt stainless steel ball valve flange, and pipe flange tight;

2. The welding flange shall be sealed with a gasket according to the working condition. The gasket is placed between the sealing surface of the two flanges. After tightening the nut, the specific pressure on the surface of the gasket is deformed after reaching a certain value, and the uneven part of the sealing surface is filled so that the connection is tight and not leaking;

3. Butt welding flange connection is a detachable connection. There are three types of flange sealing surfaces: plane sealing surface, suitable for the occasion of low pressure and non-toxic medium; Concave and convex sealing surface, suitable for slightly higher pressure occasions; Tenon sealing surface, suitable for flammable, explosive, toxic media and high-pressure occasions. Flange-type changes also require a stainless steel ball valve body to bear the characteristics of the corresponding application conditions.

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