2025-03-07
Standard for dimensions of flat welded flange with neck
The size standard of flat welded flange with neck mainly includes the following aspects :
Outside diameter (OD) and inside diameter (ID) : The outside diameter increases with the size of the flange, for example, the outside diameter of the NPS 1.5 is about 168mm, and the outside diameter of the NPS 24 is about 610mm. The inner diameter corresponds to the diameter of the pipe.
flange thickness : according to different pressure levels, the thickness of the flange varies from a few millimeters to tens of millimeters. For example, a 150 lb flange is usually around 9mm thick.
mating surface shape : the mating surface of the flange has plane (FF), convex (RF), etc., which can be selected according to different requirements.
bore and pitch : bore and pitch are designed in accordance with the standard specification to ensure the match with the bolt.
pressure grade : The pressure grade range of neck flat welded flange is wide, including 0.6Mpa ~32Mpa, 150Lb~2500Lb, PN0.25~PN42.0, etc., and can be customized according to demand.
flat welded flange with neck including chemical industry, petroleum, electric power, water supply, shipbuilding, nuclear energy, biopharmaceutical, papermaking and other fields. Its material variety, including carbon steel, stainless steel, alloy steel, such as ASTM A105, 304, 316L and so on.
standard for neck flat welded flanges refers to a number of international standards, such as ASME B16.5 and GB/T 9116-2010, to ensure their consistency and interchangeability in different applications.
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