The issue of selecting a standard system for flange gaskets?
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In engineering design, the selection of flanges and gaskets must comply with a series of standards for steel pipe flanges, gaskets, and fasteners. The question is: with the two prevailing systems today, the American system and the European system, how do we determine which one to use?
Our company generally chooses the American system for its projects~~
It seems that some choose the American system while others choose the European one; I’m not sure what determines that choice.
Observe the project owner’s purchasing habits for materials.
In engineering design, any set of standards that can meet the requirements of the client or the designer can be chosen (of course, you can also consider the cost budget and select the standard that allows for meeting the requirements while keeping costs low).
The European system refers to the standards set by the Ministry of Chemical Industry; it is likely to be used quite frequently. It should be determined by the material selection.
In my opinion, when deciding on which system to use, it is first necessary to consider which system was used in the owner’s previous projects. For the sake of consistency in spare parts, it is best for new projects to adopt the same system. Secondly, it is important to check what system the flanges of the equipment being selected follow; to facilitate piping work and reduce the amount of material-related work required, it is preferable to use the same system. Generally, the flange standards for equipment in China are HG20592, which corresponds to the European system, while equipment from abroad usually follows HG20615, the American system. This post was last edited by meili on 2009-2-19 at 10:32
I think when choosing a system, one thing to consider is the previous habits of the owners; for example, maintenance tasks should be carried out in accordance with the previous practices of the factory. For new projects, you can refer to the unified piping regulations. Uniform regulations will specify what system this project must use.
This has a lot to do with the owner; first of all, he needs to decide whether to purchase from within the country or abroad
Either of the two systems is acceptable; during the preliminary design phase, the owner and the designer need to reach an agreement.
If the new project to be built relies on foreign technology, the American standard system is adopted as the “imperial system””； In China, the European system, also known as the “metric system”, is generally used” ； Since the technology in our company is all imported from abroad, we often use the American standard system
It mainly depends on the convenience for the owner to make purchases. For our maintenance projects, we generally refer to the previous standards of the equipment; it’s sufficient to use those standards during design. For new projects, however, we follow the unified regulations set by professional designers~