Ministry of Chemical Industry Standard Tag

　　a, Standard No.: various types of pipe flanges are based on the criteria of this standard, United markup: HG20592.

　　b, flange type code according to the requirements in Table 5.0.1.

　　Threaded flange in accordance with the provisions of the tapered pipe thread GB/T7306 when marked as "Th (Rc)" or "Th (Rp)";

　　Threaded flange in accordance with the provisions of the tapered pipe thread GB/T12716 when marked as "Th (NPT)";

　　Threaded flange threaded code without markup, compared with Rp (GB/T7306.1).

　　c, flange nominal diameter DN (mm) diameter steel pipe with the application of series:

　　Overall flange, flange cover, lining flange cover, threaded flange, applicable tube outer diameter range of marks can be omitted;

　　Apply internationally accepted series of steel pipe (commonly known as British tube) of the flange, mark "DN (A)";

　　Applicable to domestic follow the series of pipe (commonly known as metric tube) of the flange, marked as "DN (B)".

　　We have adopted advanced production equipment and technologies to manufacture our blind flanges and socket flanges, which can not only improve product quality, but also save raw materials. Our products have high strength, good toughness and resistance to corrosion.