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    11 Products
    About Pipe and Fittings
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    Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

    Low-Pressure Aluminum Unthreaded Pipe Flanges

    Also known as Pressure Class 125 flanges, these are for use in low-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are aluminum, which is lightweight with good corrosion resistance.
    Blind Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Aluminum Unthreaded Pipe Flanges, Blind Flanges, Flanged, Flat.
    Image of Product. Flat Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Aluminum Unthreaded Pipe Flanges, Blind Flanges, Flanged, Flat.

    Front

    Flat Surface

    on Back

    Bolt
    Hole
    Pipe
    Size
    Flanged Connection
    Surface
    Flange
    OD
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Pressure
    Class
    Material
    Max. Pressure
    @ Temp.
    Each
    Flanged
    1/2
    		Flat3 1/2"1/2"5/8"42 3/8"125
    		356 Aluminum150 psi @ 72° F44705K531000000
    3/4
    		Flat3 7/8"1/2"5/8"42 3/4"125
    		356 Aluminum150 psi @ 72° F44705K53200000
    1
    		Flat4 1/4"1/2"5/8"43 1/8"125
    		356 Aluminum150 psi @ 72° F44705K53300000
    1 1/4
    		Flat4 5/8"1/2"5/8"43 1/2"125
    		356 Aluminum150 psi @ 72° F44705K53400000
    1 1/2
    		Flat5"1/2"5/8"43 7/8"125
    		356 Aluminum150 psi @ 72° F44705K53500000
    2
    		Flat6"5/8"3/4"44 3/4"125
    		356 Aluminum150 psi @ 72° F44705K53600000
    2 1/2
    		Flat7"5/8"3/4"45 1/2"125
    		356 Aluminum150 psi @ 72° F44705K53700000
    3
    		Flat7 1/2"5/8"3/4"46"125
    		356 Aluminum150 psi @ 72° F44705K538000000
    4
    		Flat9"5/8"3/4"87 1/2"125
    		356 Aluminum150 psi @ 72° F44705K539000000
    6
    		Flat11"3/4"7/8"89 1/2"125
    		356 Aluminum150 psi @ 72° F44705K541000000
    8
    		Flat13 1/2"3/4"7/8"811 3/4"125
    		356 Aluminum150 psi @ 72° F44705K399000000
     
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