JPI/ASME flange dimensions and bolt size list
A practical quick reference table (15A to 500A) that clearly distinguishes bolt and screw standards based on official data!
Are you having trouble determining whether the bolt threads that fit 150LB (Class 150) or 300LB (Class 300) flanges in the maintenance of overseas plant equipment or in the construction of piping lines designed for oil refining and chemical plants are in metric standards or unified standards (inches)? Do you want to know the exact length of the stud bolts? In domestic plants, the JPI-7S-15 (Flanges for Petroleum Industry) standard, which is based on ASME B16.5, is widely used. While the basic dimensional system is based on ASME B16.5, there are also differences tailored to domestic operations, so it is necessary to confirm the actual specifications. Since these differ from the familiar JIS standards (10K/20K, etc.) in terms of outer diameter, P.C.D (the diameter of the circle connecting the centers of the bolt holes), and the number of bolts, if you do not confirm the exact specifications and arrange accordingly, it could lead to nonconformities on-site or leakage risks due to poor fastening. *For detailed content of the column, you can view it through the related link. For more information, please download the PDF or feel free to contact us.*
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*You can view the detailed content of the column through the related link. For more information, please download the PDF or feel free to contact us.*
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*You can view the detailed content of the column through the related link. For more information, please download the PDF or feel free to contact us.*
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Daiko is a manufacturer specialized in processing various industrial products, including gaskets and packing. With industry-leading processing equipment, including one of Japan's largest water jet cutting machines, and a wide range of materials such as joint sheets, rubber, resin, and metal, we meet our customers' diverse needs. Leveraging the technology and experience we have cultivated over 50 years, we provide high-quality, short-lead-time, and low-cost products to contribute to solving our customers' challenges. To respond to our customers' varied needs, Daiko's production bases are equipped with various processing facilities. Among them, the water jet cutting machines, with a total of four installed at our Osaka headquarters and Tokyo branch, boast one of the largest scales in the country. The maximum processing range is W4,000 × L5,500 mm, allowing for the high-precision manufacturing of large-diameter gaskets and packing. By maximizing material efficiency, we achieve the provision of 'high quality at low cost.'