The long high neck flange is actually an extended form of the neck butt welding flange. The flange neck is slightly straight cylinder type, the neck height is 229mm (<=DN100) or 305mm (>DN100). The flange neck is not grooved. For the processing of the groove, please refer to the relevant requirements of the relevant standards of HG20615-2009 and users Determined by negotiation.
Various carbon steel American standard long high neck flanges mainly produced by our company:
carbon steel(CS) ASME B16.5 CLASS 150
carbon steel(CS) ASME B16.5 CLASS 300
carbon steel(CS) ASME B16.5 CLASS 400
carbon steel(CS) ASME B16.5 CLASS 600
carbon steel(CS) ASME B16.5 CLASS 900
carbon steel(CS) ASME B16.5 CLASS 1500
carbon steel(CS) ASME B16.5 CLASS 2500
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