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    4 Products
    About Pipe and Fittings
    industrial info icon

    Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

    High-Pressure Iron and Steel Unthreaded Pipe Flanges

    Forged for extra strength, these heavy duty flanges can withstand high-pressure applications. Bolt two flat-surface flanges or two raised-surface flanges of the same size together with a gasket (sold separately) to create an access point in a pipe line.
    Forged Flanges
    Image of Product. Butt Weld (Front). Front orientation. Pipe and Fittings. High-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Flanges, Butt Weld, Raised Surface.
    Image of Product. Butt Weld (Raised Surface on Back). Back orientation. Pipe and Fittings. High-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Flanges, Butt Weld, Raised Surface.
    Image of Product. Slip-On Weld (Front). Front orientation. Pipe and Fittings. High-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Flanges, Slip-On Weld Female, Raised Surface.

    Butt Weld

    (Front)

    Butt Weld

    (Raised Surface

    on Back)

    Slip-On Weld

    (Front)

    Image of Product. Slip-On Weld (Raised Surface on Back). Front orientation. Pipe and Fittings. High-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Flanges, Slip-On Weld Female, Raised Surface.
    Image of Product. Socket Connect (Front). Front orientation. Contains Annotated. Pipe and Fittings. High-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Flanges, Socket-Connect Female, Raised Surface.
    Image of Product. Socket-Connect (Raised Surface on Back). Back orientation. Pipe and Fittings. High-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Flanges, Socket-Connect Female, Raised Surface.

    Slip-On Weld

    (Raised

    Surface on

    Back)

    Socket Connect (Front)

    Socket-Connect

    (Raised

    Surface on

    Back)

    Forged flanges have better strength than cast flanges.
    Butt-Weld Fitting Connection—Butt-weld flanges are also known as weld-neck flanges; the flange neck has a beveled end that, when flush to pipe, creates a trough for a strong weld.
    Slip-on-Weld Fitting Connection—Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.
    Pipe
    Size
    Dash
    Size
    Bolt
    Hole
    (A)
    (B)
    (A)
    (B)
    Flanged Connection
    Surface (B)
    Flange
    OD
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Pressure
    Class
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Butt Weld
    1
    		1
    		1616Raised4.88"3/4"3/4"43 1/2"600
    		Steel
    		1,400 psi @ 72° F1,300 psi @ 300° F6806K448000000
     
    Slip-On Weld Female
    1
    		1
    		1616Raised4.88"3/4"3/4"43 1/2"600
    		Steel
    		1,400 psi @ 72° F1,300 psi @ 300° F6806K43500000
     
    Socket-Connect Female
    1
    		1
    		1616Raised4.88"3/4"3/4"43 1/2"600
    		Steel
    		1,400 psi @ 72° F1,300 psi @ 300° F6806K42800000
     
    Forged Blind Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. High-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Blind Flanges, Flanged, Raised.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. High-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Blind Flanges, Flanged, Raised.

    Front

    Raised

    Surface on

    Back

    Forged flanges have better strength than cast flanges.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Bolt
    Hole
    Pipe
    Size
    Dash
    Size
    Flanged Connection
    Surface
    Flange
    OD
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Pressure
    Class
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Flanged
    1
    		16Raised4.88"3/4"3/4"43 1/2"600
    		Steel
    		1,400 psi @ 72° F1,300 psi @ 300° F6806K455000000
     
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