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Classification

Energy Department

NB/T 47020-2012,NB/T 47023-2012
  • Long

    Long Neck Butt Welding Flange

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  • Blind

    Blind Flange

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  • Non-standard

    Non-standard Blind Flange

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  • Long

    Long Neck Butt Welding Flange

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  • Non-standard

    Non-standard Blind Flange

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  • Large

    Large Caliber Flange

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