How to judge whether the flange is American standard or national standard

Flange

A flange is a mechanical component that connects pipes and equipment. It usually consists of two discs of the same shape and size, which are tightly pressed together through bolts and nuts. The main function of flanges is to connect pipelines and equipment together to form a connected pipeline system. They are generally used in petroleum, chemical, thermal power, papermaking and other industries.

Flange is a component that connects pipes, pumps, valves and other equipment. It has various types and different size standards. For users, how to judge whether a flange is an American standard or a national standard is worthy of discussion.

Understand flange size standards

First, understand the flange size standards. The national flange size standards mainly include GB/T9119-2010 and GB/T9124-2010. Among them, GB/T9119-2010 is the flange surface sealing size standard for steel pipe flanges and steel butt welding flanges, and GB/T9124- 2010 is the connection size standard for flange rubber soft connections. The American standard flange size standards mainly include ASME B16.5-2013 and ASME B16.47-2011. ASME B16.5-2013 is the size standard for steel pipe flanges, and ASME B16.47-2011 is the size standard for large steel pipe flanges. Flange size standards.

Understand flange manufacturing standards

In addition to dimensional standards, flange manufacturing standards are also an important basis for distinguishing American standards and national standards. The national flange manufacturing standards mainly include GB/T 13402-2010, GB/T 10746-2008, GB/T 14626-2007, HG/T 20592-2009, etc., including flange materials, bolts, seals, appearance, etc. Require. The manufacturing standards of American standard flanges mainly include ASME B16.34-2013, ASME B18.2.1-2010, etc., covering flange manufacturing, material and bolt requirements.

Practical suggestions

So, how to judge whether the flange is American standard or national standard? Here are some practical suggestions for your reference:

1. Judge according to the marking on the flange. Generally speaking, companies will mark the flange when leaving the factory, such as flange model, material, pressure and other information. If the corresponding mark can be identified, it can be easier to determine whether the flange is an American standard or a national standard.

2. Compare flange dimensions. By comparing the dimensions of flanges, American standard and national standard flanges can be clearly distinguished because their sizes and graphics are different.

3. Compare flange manufacturing standards. You can judge the standard type of flange by starting from whether the flange complies with national standards and American standard manufacturing standards.

In short, judging whether a flange is an American standard or a national standard requires mastering some professional knowledge and skills. By comparing the size and manufacturing standards of the flange, the flange standard type can be judged more accurately.