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    12 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.

    Low-Pressure Iron and Steel Unthreaded Pipe Flanges

    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. Flanges are for use with low-pressure applications in noncorrosive environments.
    Flanges
    Image of Product. Butt Weld: Front. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Flanges, Butt Weld, Raised Surface.
    Image of Product. Butt Weld: Raised Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Flanges, Butt Weld, Raised Surface.
    Image of Product. Slip-On Weld: Front. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Flanges, Slip-On Weld Female, Raised Surface.
    Image of Product. Slip-On Weld: Raised Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Flanges, Slip-On Weld Female, Raised Surface.

    Butt Weld:

    Front

    Butt

    Weld:

    Raised

    Surface

    on Back

    Slip-On

    Weld:

    Front

    Slip-On

    Weld:

    Raised

    Surface

    on Back

    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
    Bolt
    Hole
    (A)
    (B)
    Flanged Connection
    Surface (B)
    Flange
    OD, mm
    For Bolt
    Dia., mm
    Dia.,
    mm
    No.
    Of
    Bolt Circle
    Dia., mm
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Butt Weld
    1
    		1
    		Raised1151214485Steel230 psi @ 72° F180 psi @ 300° F1132T11000000
    2
    		2
    		Raised16516184125Steel230 psi @ 72° F180 psi @ 300° F1132T1200000
    3
    		3
    		Raised20016188160Steel230 psi @ 72° F180 psi @ 300° F1132T1300000
    4
    		4
    		Raised22016188180Steel230 psi @ 72° F180 psi @ 300° F1132T1400000
     
    Slip-On Weld Female
    1
    		1
    		Raised1151214485Steel230 psi @ 72° F180 psi @ 300° F1132T1900000
    2
    		2
    		Raised16516184125Steel230 psi @ 72° F180 psi @ 300° F1132T2100000
    3
    		3
    		Raised20016188160Steel230 psi @ 72° F180 psi @ 300° F1132T2200000
    4
    		4
    		Raised22016188180Steel230 psi @ 72° F180 psi @ 300° F1132T2300000
     
    Blind Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Blind Flanges, Flanged, Raised.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Blind Flanges, Flanged, Raised.

    Front

    Raised

    Surface

    on Back

    Bolt
    Hole
    Pipe
    Size
    Flanged Connection
    Surface
    Flange
    OD, mm
    For Bolt
    Dia., mm
    Dia.,
    mm
    No.
    Of
    Bolt Circle
    Dia., mm
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Flanged
    1
    		Raised1151214485Steel230 psi @ 72° F180 psi @ 300° F1132T15000000
    2
    		Raised16516184125Steel230 psi @ 72° F180 psi @ 300° F1132T1600000
    3
    		Raised20016188160Steel230 psi @ 72° F180 psi @ 300° F1132T1700000
    4
    		Raised22016188180Steel230 psi @ 72° F180 psi @ 300° F1132T1800000
     
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