Forged pipe fittings are used in heavy industries with high pressure and corrosive conditions. They also have a thicker wall. There is a marking on the collar portion of the fittings. The purpose of the marking is to ease identification and ensure smooth system operation. It may include the fitting size, class pressure, specification, brand, origin, connection type, material grade and heat number.
The purpose of pipe union fitting is to detach two pipes without deforming them. Because of its purpose, it is highly demanded in the pipe fitting industry. A pipe union has three parts which are the female end, male end, and the nut. The nut exert pressure onto the female and male end, hence providing the necessary pressure to seal the fitting. If there is too much pressure, the locking screw breaks. This separates the union fitting, hence releasing the pipes without causing any damage or deformities.
Forged pipe unions are made in accordance of ASME B16.11 standard. Class pressure of 3000 will have a 3M marking. It is smaller, lighter, thinner, and have a lower working pressure. The material used is stainless steel SS316. The available connection is NPT threaded.
Installing a forged pipe fitting depends on the connection type. This forged pipe union has one male and one female threaded end. For threaded connection, the male thread will be inserted into the female end. NPT is commonly used because a narrow thread makes better sealing. The threaded ends make it easy to assemble and disassemble during maintenance and installation.