Hebei Haihao Group has finished an order of ASTM A182 F321 weld neck flange order from Russia. Grade 321 is an austenitic stainless steel alloy that is similar in its chemistry to grade 304 stainless steel. However, what separates the SS 321 and grade 304 is the addition of titanium and the cont ...

People are wondering 300lb socket welding flange with Schedule? As we know that Pipe Fittings have different description of pressure ratings. The pressure ratings of Socket Weld Fittings are 3000, 6000, 9000 that defined as LB or Class. And for butt weld fittings which are Sch40, Sch80 and so on ...

The application of flanges plays an important role in many aspects, including petrochemical industry, energy industry, scientific research and military industry and other sectors of the national economy. However, in the reactor of the oil refinery, the production environment where the flange is ...

Do you know what to do after the flange rusts? Large stainless steel flanges will rust in general environment, mainly on any surface, free iron will rust and cause corrosion of stainless steel. Therefore, it must be cleared. Floating powder can generally be removed with the dust. Some have stron ...

Metal spiral wound gaskets (base type) are made of high quality SUS304, SUS316 metal strips (” V “or” W “shape) and other alloy materials, and are spiral wound with graphite, asbestos, polytetrafluoroethylene, non-asbestos and other soft materials.Metal strips are fixed a ...

A blind flange looks like a plate with bolts holes around. There is no inner hole on the blind flange comparing to other type flanges, so the blind flange is used to close the end of a vessel or piping system. Blind flange also be used for pressure testing for prevent the liquid or air flow.What ...

For those who don’t know much about flanges, flanges are actually a common disc-shaped part that helps connect pipes, equipment, etc.Forged flange because of its excellent joint performance, in many places has been rapidly promoted and applied.But many people still have a lot of questions ...

The lens ring type of flange joint is used to create a seal in high temperature and high pressure piping systems. This joint differs from the standard raised face flange joint (which has a ‘flat’ sealing face), by having a sealing face angled at 20° down towards the center of the bor ...

Last article we learned about some flange gaskets,today let me tell you other flange gaskets.(How to identify and choose flange gaskets-part one) Metal jacketed gasket A metal jacketed gasket is a composite gasket composed of a non-metallic material as the core material and cut into the desired ...

Flat gaskets used in the industry generally consist of a sealing element and an inner and outer reinforcing ring, which is a key part of the leakage prevention. Commonly used materials are non-metallic materials, such as flexible graphite, PTFE, fiber reinforced rubber-based composite panels. In ...

Stub ends and lap joint flanges can be assembled following this process: The lap flange is slipped over and onto the stub end flange. The stub end flange is then welded onto a pipe spool, using an approved Welding. Procedure specification (WPS), by a qualified welder. The lap joint flange, back ...

Flange is widely used in basic projects such as chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire fighting, electric power, aerospace, shipbuilding and so on. So there are many types of Flanges. How do we choos ...