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Flat welding flange, German standard flange, European standard flange, national standard flange, American standard flat flange, Japanese standard flange

Flat welding flanges are suitable for pipeline systems with relatively low pressure levels and where pressure fluctuations, vibrations and oscillations are not serious.The advantage of flat welding flange is that it is easier to center during welding and assembly and the price is relatively cheap, so it has been widely used.
Product specifications DN10-DN2000
Flat welding flanges are not allowed to be directly welded to tees, elbows and other pipe fittings, and straight pipe sections need to be added.
Ministry of Chemical Industry Standard: HG20593-2009
HG20615-2009
National standard: GB/T9119-2010
GB/T2555-81
Mechanical Department Standard: JB/T81-94
JB/T74-94
JB/T75-94
Marine standard: CB M1001-81
Operating pressure PN0.25MPa, PN0.6MPa, PN1.0MPa, PN1.6MPa, PN2.5MPa, PN4.0MPa
Product Categories Full-face plate flange (FF), raised plate flange (RF)
Availability:
Quantity:
  • PL

  • 诚德

  • CD&PL001

The quality of flat welding flanges is directly related to the production costs or economic benefits of companies and enterprises, so we at Chengde are constantly improving and improving the quality of flat welding flanges.
  However, the main design disadvantage of the flat weld flange is that it is not guaranteed to be leak-free.This is a shortcoming in its design: the connection is dynamic, and cyclic loads such as thermal expansion and fluctuations will cause movement between the flange surfaces, affecting the function of the flange, thereby damaging the integrity of the flange, and ultimately causing leakage.No product can be without defects. We just try to control the defects of the product to the minimum. Therefore, we at Chengde try our best to improve the performance of the product when producing flat welding flanges so that they can play their maximum role.
  Features of flat welding flange: Flat welding flange not only saves space and reduces weight, but more importantly, ensures that the joint will not leak and has good sealing performance.The reduction in compact flange size is due to a reduction in the diameter of the seal, which will reduce the cross-section of the sealing surface.Secondly, the flange gasket has been replaced by a sealing ring to ensure that the sealing surface matches the sealing surface.This way, only a small amount of pressure is needed to compress the cover.As the required pressure decreases, the size and number of bolts can be reduced accordingly, so a new flange that is small in size and light in weight (70% to 80% lighter than traditional flanges) is finally designed. product.Therefore, the flat welding flange type is a relatively high-quality flange product, which reduces the quality and space and plays an important role in industrial applications.
  

ANSI Class 150, 300, 600, 900, 1500 and 2500

DIN PN 6, PN 10, PN16, PN25, PN40 and PN64        

JIS 5K, 10K, 16K and 20K

Material: 304, 316L, 254SMO, 2507, 904L, 2520, 2205, 317L, 316TI,Various special materials, high temperature steel and other materials

HG5010-58 plate flat welding flange PN1.0 (10kg pressure)

Nominal diameterPipe outer diameterFlange connection sizeSeal surface sizeFlange thicknesstheoretical weight
Flange outer diameterFlange inner diameterBolt hole center circle diameter KBolt hole diameter Lboltdf
DNADBQuantity nBolt specificationsckg
1014901560144M12402120.46
1518951965144M12452120.51
20251052675144M12552140.74
25321153385144M12652140.89
323813539100184M16752161.40
404514546110184M18853181.74
505716059125184M181003182.07
657618078145184M161203202.80
808919591160184M161353203.20
100108215110180184M161553223.95
125133245135210188M161853245.43
150159280161240238M202103246.65
200219335222295238M202653248.07
2502733902763502312M2032032610.46
3003254403284002312M2036542812.60

HG20593-97 plate flat welding flange PN1.0 (10kg pressure)

Nominal diameterFlange connection sizeSeal surface sizeFlange thicknesstheoretical weight
Flange outer diameterFlange inner diameterBolt hole center circle diameter KBolt hole diameter Lboltdf
B
DNDSeries ISeries IIQuantity nBolt specificationsckg
Series ISeries II
1090181560144M12412140.540.55
1595221965144M12462140.600.61
2010527.52675144M12562160.860.86
2511534.53385144M12652161.021.02
3214043.539100184M16762181.681.73
4015049.546110184M16842181.931.96
5016561.559125184M16992202.562.29
6518577.578145184M161182203.123.11
8020090.591160188M161322203.393.38
100220116110180188M161562224.164.35
125250141.5135210188M161842225.145.39
150285170.5161240228M202112246.817.28
200340221.5222295228M202662248.868.82
250395276.52763502212M2031922611.3411.38
300445327.53284002212M2037022814.1314.07


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