GOST 12821 Weld-neck Flange is a kind of flange that butt welds the pipe with the neck. The shape isn't easy to change, the sealing performance is very good. It is wildly applied. It is suitable for pressure or temperature fluctuations of the pipeline or high temperature and high pressure and low temperature pipeline, generally used for connecting pipes and valves of above 2.5MPa; It also used in the pipeline which transport expensive, flammable and explosive medium.
Production Size: 1/2"-96"
Pressure Range: PN16, PN25, PN40, PN64, PN100, PN250
Production Standard: BS, JIS, GOST, ANSI, DIN, GB
A105, A350-LF2, A182-F5, A182-F11, A182-F304, A182-F304L, A182-F316, A182-F316L, A234-WPB, A420-WPL6, A234-WP12, A234-WP11, A234-WP5, A403-WP304, A430-WP304L, A403-WP316, A403-WP316L