Stainless steel long weld neck flange
Stainless steel long weld neck flange
What is stainless steel weld neck flange?
Stainless steel weld neck flange including stainless steel long weld neck flange, with neck butt welding surface flange, with neck butt welding flange products and so on, it is mainly suitable for flange and pipe butt welding, its structure is reasonable, strength and stiffness is larger, can withstand high temperature, high pressure and repeated bending and temperature fluctuations;
Stainless steel weld neck flange can be divided into: plane butt welding flanges, protruding face welding flanges, concave and convex face welding flanges, tenon and groove face welding flanges, ring joint surface welding flanges.
What is stainless steel long weld neck flange?
Stainless steel long weld neck flange is simply stainless steel high neck flange, generally said that long neck flange is divided according to the American standard; National standard weld neck flange compared with American standard butt welding flange appearance above the neck will be shorter.
It is the neck of the butt welding flange is much longer than the ordinary welding neck of a long process, suitable for high pressure pipeline, pressure vessel flange. So it’s called a long weld neck flange.
It is mainly used in harsh working conditions, such as pipe thermal expansion or other loads to make the flange by the stress or stress changes repeatedly, pressure, temperature fluctuation of the pipeline or high temperature, high pressure and zero low temperature pipeline. Weld neck flange is not easy to deform, good sealing, widely used, nominal pressure PN1.0MPa~PN25.0MPa.
Specifications：
1/2 “to 24”
Classes：
150LB, 300LB, 600LB, 900LB, 1500LB, 2500LB;
Sealing surface type:
Convex surface (RF), concave surface (FM), convex surface (M), tenon surface (T), groove surface (G), full plane (FF).
Stainless steel high neck butt welding flange material:
ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8.
Execution standard:
HG/T20615-2009、ASME B16.5、ANSI B 16.47.
The connection form:
The connection form of American standard butt welding flange is the same as that of national standard butt welding flange. The neck is welded, flange gasket is added to the sealing surface, and the bolt hole is tightened with bolts.
Stainless steel long weld neck flange features
- Because of its stainless steel material can be acid and alkali resistance, anti-corrosion, high temperature resistance, corrosion resistance and so on;
- Because the neck of American standard design butt welding flange is relatively high, its design characteristics and mechanical properties have been recognized, and has been widely used in the United States.
- There are corresponding rigid and elastic requirements and reasonable welding thinning transition, welding from the joint surface distance, joint surface from welding temperature deformation.
