You may not know: flat welding flange can be divided into two forms of influenza type b flanges, flanges. 1) flange b with a short barrel, so rigid better than type a flanges can be used for high pressure, larger diameter;
2) weld form: v-Groove type a and type b, a u-shaped Groove, more vulnerable to penetration, so the higher strength and stiffness.
Pressure vessel flanges into flat welding flange and the flange. Flat welding flange type a flanges, flange b in two forms.
Graphic standards, as follows:
Flat welding flange
1) flange b with a short barrel, so rigid better than type a flanges can be used for high pressure, larger diameter;
2) weld form: v-Groove type a and type b, a u-shaped Groove, more vulnerable to penetration, so the higher strength and stiffness.
Welding neck flanges
Because of the long neck, and welded, rigid better for higher pressure