China issued GB/T specifically for flange standards. 9112 ~ 9124-2010 steel pipe flange. Next, I will briefly and systematically introduce you to some matters related to international flange standards.
GB/T mentioned above? 9112 ~ 9124-2010 steel pipe flange 2011by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and People's Republic of China (PRC) countries. The * * * includes thirteen standards.
Generally speaking, the commonly used flange specifications in the world are divided into six parts: nominal diameter, flange outer diameter, bolt hole spacing, bolt diameter, bolt hole number and flange thickness. Nominal diameter is generally expressed by DNxx, and xx corresponds to numbers. For example, if the nominal diameter is DN 10, the corresponding flange outer diameter is 50, the bolt hole spacing is 60, the bolt diameter is 14, the bolt hole number is 4, and the flange thickness is 14. For more values, please refer to our website and introduce the standard dimensions of international flanges in detail. It is worth noting that international flange codes and standards are also divided into different categories, and the division of each category is also different in value. When you query, you should pay attention to whether it is the category you need.
In addition, GB/T? The pressure marks of 9112 ~ 9124-2010 steel pipe flanges are marked as PN and Class respectively. Among them, PN markers are divided into PN2.5 and PN 6 PN10; pn 16； PN25PN40PN63pn 100； pn 160； PN250PN320PN400 and other 12 pressure classes. And class labels are divided into classes. 150; Class? 300; Class? 600; Class? 900; Class? 1500; Class? 6 The pressure level is 2500. At the same time, the flange has another meaning, that is, the flange produced in strict accordance with the dimensions and tolerance range required by international labeling. This is mainly used to distinguish flanges that are not produced according to standards, so as to prevent illegal businesses from fishing in troubled waters.
In addition to the GB/T introduced above? In addition to 9112 ~ 9124-2010 steel pipe flanges, there are different implementation standards for international flanges, namely JB series of machinery department, HG series of HG20592 standard of chemical department, ASME? B 16.5, BS4504, german industrial standard, JIS standard and China standard. If you want to know more about these international flange standards, please pay more attention to our website update.
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