When steel and malleable cast iron pipe fittings are threaded, if the working pressure is high (but within 1.6Mpa), steel pipe fittings can be used. The standard of stainless steel pipe fittings shall include the type parameter standard of the pipe fittings and the material standard of stainless steel pipe fittings. However, the material standards are either incomplete or lack of quality technical requirements such as ordering requirements, inspection and assembly rules, and quality certification.
Stainless steel pipe fittings have poor standard matching, and are often formulated from their respective positions and angles, rather than from the entire standard system of pressure piping.
In the selection of the project, the pipe standard is available, but there is no corresponding forging or casting standard. The water supply malleable iron pipe fittings manufacturer are cast by gray cast iron. The feed water cast iron pipe fittings are of the socket type and the flange type, and the use thereof is similar to that of the malleable cast pipe. The reality is that the standard for the forging of stainless steel pipe fittings borrows pressure vessels, and does not consider the difference between the two, such as welding, film inspection and other regulations.
Steel pipe fittings are made of carbon steel, commonly known as wrought iron pipe fittings. It has good weldability and can be used in places where welding is required. For example, steel pipe hoops are often used as steel equipment such as boilers or water tanks.
For the type test standard of stainless steel pipe fittings, only GB12459 and GB13401 standards specify the pressure calculation for the blasting test of steel butt welded seamless stainless steel pipe fittings and steel plate socketed stainless steel fittings. Other types of test standards or implementation standards for ensuring the quality of pipe fittings are not available. . In order to meet different applications and conditions, steel metal stainless steel pipe fittings have various structural forms of threaded pipe fittings. Among them, elbows, tees and reducers are the most used.
