Common domestic plat flange manufacturing standards: National Standard of the People’s Republic of China GB/T 9116-2010 Hubbed slip-on-welding steel pipe flanges (Hubbed slip-on-welding steel pipe flanges); Chemical Industry Standard of the People’s Republic of China HG/T20592 ~20635-2009 Medium PN series (European system) Table 8.2.2-1 ~ Table 8.2.2-5, according to Figure 8.2.2; HG/T20592~20635-2009 Medium Class series (American system) Table 8.2.1 -1~Table 8.2.2-6 is in accordance with Figure 8.2.1. The sealing surface forms of the flange with neck flat welding flange with neck flat welding flange are: raised surface (RF), concave surface (FM), convex surface (M), tenon surface (T), groove surface (G) ), full plane (FF). The diameter range of the neck flat welding flange: DN10~DN600 Applicable scope: PN series PN2.5~PN40; Class series Class150~Class1500 Flange material: carbon steel, molybdenum steel, 304, 316, 304L, 316L, 321, 347, CF8C. Manufacturing process: forging. Advantages: Flat-welded flanges with necks are also flat-welded flanges, because they have a short neck, which increases the strength of the flange and improves the bearing strength of the flange. So it can be used on higher pressure pipelines. Disadvantages: The cost is higher than the plate flat welding flange, and it is easier to bump during transportation due to the characteristics of its shape.
Shanxi Haokun flanges specializes in the production of ASME stainless steel plate flanges:
stainless steel(SS) AWWA C207 CLASS B
stainless steel(SS) AWWA C207 CLASS D
stainless steel(SS) AWWA C207 CLASS E
stainless steel(SS) AWWA C207 CLASS F
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