• Haji Iron & Steel Works

Flanges, Blind Type

Haji Iron & Steel Works offers Blind Flanges. This is a flange without an opening or bore. It is used to close off the ends of a piping systems and/or a pressure vessel opening. They may often be supplied with NPT fittings to allow pressure test connections to be fitted.

A Flange allows two pipes to be mechanically connected together, or a pipe to be mechanically connected to a valve, tee, choke or other piece of equipment. The principle of a flange is to use a mechanical force (exerted by the bolts) to pre - load the gasket sufficiently so that when internal pressure (end cap force) is applied, there is enough contact stress between the flanges and gasket to maintain a seal. The Flange it self needs to be connected to the pipe. This is usually achieved by welding though threaded and other weldless connections also exist.