ge marking and marking sample

　　1, National Institute of Standards tags: flange should be nominal diameter, nominal pressure, the sealing surface forms of code, with steel used in series of code (with rice tube, code-named "Series 2", equipped with the British controls are not marked) and standard No. to tag.

　　Tag example: DN 80mm, nominal pressure 4.0MPa (25bar) of the convex welded steel pipe flange (with rice pipe)

　　Flange DN80-PN40 M (Series 2) GB/T9115.2-2000, nominal diameter 100mm, nominal pressure 5.0MPa (25bar) face of sudden neck flat welded steel pipe with a flange (equipped with the British tube) flange DN100-PN50 RF GB/T9116.1-2000.

　　2, Ministry of Machinery Standard Tag:

　　Tag example: nominal diameter 500mm, nominal pressure 1.6MPa, Series 2 of the sudden face flat welded steel pipe flange

　　Flange 500-16 JB/T81-94

　　Nominal diameter 300mm, nominal pressure 6.4MPa, Series 1 of the concave welded steel pipe flange

　　Flange 300-64B (Series 1) JB/T82.2-94

　　(Note: The Ministry of Machinery standard default pipe diameter series 2, welded flange Category: A-type convex, B-type concave, C-type tenon face, D-groove surface)

　　Hebei shengtian pipe-fitting group Co. is a leading manufacturer and supplier of carbon steel pipe fittings and  steel flange.