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| Common flange markers and mark examples | A complete pressurization cylinder is by a variety of workpiece, which is part of the flange, we will introduce some common flange markers and mark examples.
Mark: 1, the national standard flange should press nominal pressure, nominal diameter, sealing form the code, steel tube (with metric series code named "series 2", with imperial tube not mark) and standard Numbers to mark.
Mark examples: nominal diameter 80mm nominal pressure, 25bar (4.0 MPa) steel welded pipe flanges (convex metric tube) with
DN80 flange PN40-2) series of M (GB/T9115.2-2000, nominal diameter 100mm, nominal pressure 5.0 25bar (MPa) of the surface of steel tube with carotid flat welding flanges (with imperial tube) flange PN50 DN100 - T9116.1-2000 (GB/RF.
Mark: 2 and having standard
Mark examples: nominal diameter 500mm, nominal pressure, series 2 160 MPa surface flat steel pipe welding processes flange
Flange 500-16 JB/T81-94
Nominal diameter 300mm, nominal pressure 6.4 MPa, series of steel welded convex 1 pipe flanges
Flange 300-64B (1) series JB/T82.2-94
Note: default pipe diameter machinerydepartment standards for series 2, welded convex flange classification: type A, type B, type C concave projection, D tank)
3 and resification standards should be marked by following regulation: flange (recommended by the marker methods),
A: various types, standard in this standard pipe flanges, the standard, unified marks: HG20592.
B, flange type according to the provisions of the code 5.0.1 table.
Threaded flanges using T7306 GB/prescribed tapered pipe threads, marked "Th (Rc)" or "Th (Rp);"
Threaded flanges using T12716 GB/prescribed tapered pipe threads, marked "Th (NPT);"
Threaded flange if not mark thread code, for Rp (GB/T7306.1).
C, flange nominal diameter DN (mm) and apply pipe diameter series:
Overall, flanges flanges flanges, lining, thread steel flange diameter, applicable to omit; mark series,
Applicable international gm series of steel tube (also called the flange, inch) marked "DN (A);"
Applicable to use domestic steel pipe series (also called the metric system for the flange), "the DN (B)".
D, flange, MPa PN nominal pressure.
E, sealing form according to the provisions 6.0.1 code, such as car MiWen system face flange, marked "hull RF (A)".
F, shall be provided by the users of the steel wall thickness.
With carotid butt flange, welded loop loose sets should be marked the wall thickness of steel flange.
G, materials, etc.
H, other. Using this standard series rules requirements or additional requirements, such as the sealing surface roughness, etc.
Mark examples:
Nominal diameter 1200mm 0.6 MPa, nominal pressure, with the metric system of the pipe welding steel plate flat surface, materials for Q235A pipe flanges
HG20592 flange PL1200 (B) - 0.6 RF Q235A
Nominal diameter 300mm nominal pressure, 2.5 MPa, with imperial tube with carotid flat steel welded convex flange, materials for 20 steel
HG20592 flange SO300 (A) - 2.5 M 20
Nominal diameter 150mm, nominal pressure 16.0 MPa, blending with the LianJieMian ring in pipe welded steel pipe flanges, neck 16Mn materials, wall thickness steel for 10mm
HG20592 flange WN150 (A) - 10mm 16Mn 16.0 RJ S =
Nominal diameter for 200mm, nominal pressure is 1.0 MPa, with the metric system of the tube with welded loop of steel pipe flanges, loose materials: flange 20, welded loop 316, steel wall thickness for 4mm
HG20592 flange PJ/SE200 (B) - 1.0 RF S = 4mm 20/316
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