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    33 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.

    Fitting Type

    Threading

    Threading

    Low-Pressure Iron and Steel Threaded Pipe Flanges

    Use these flanges for low-pressure applications in noncorrosive environments. Bolt two flanges of the same size together with a gasket (sold separately) to create an access point within a line.
    Forged Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Threaded Pipe Flanges, Forged Flanges, Flanged Fitting Connection, Female, Threaded Fitting Connection, Raised Surface.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Iron and Steel Threaded Pipe Flanges, Forged Flanges, Flanged Fitting Connection, Female, Threaded Fitting Connection, Raised Surface.

    Front

    Raised

    Surface on

    Back

    Forged flanges have better strength than cast flanges.
    A350 Carbon Steel—Even in temperatures as low as -46° F, these flanges won’t become brittle, so they absorb impact better than other low-pressure steel flanges.
    Pipe
    Size
    Bolt
    Hole
    (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
    NPT Female
    1/2
    		1/2
    		Raised3 1/2"1/2"5/8"42 3/8"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5281N11000000
    3/4
    		3/4
    		Raised3 7/8"1/2"5/8"42 3/4"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5281N1200000
    1
    		1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5281N1300000
    1 1/4
    		1 1/4
    		Raised4 5/8"1/2"5/8"43 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5281N1400000
    1 1/2
    		1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5281N1500000
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5281N1600000
    2 1/2
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5281N1700000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5281N1800000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5281N1900000
    6
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5281N21000000
     

    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.
    Forged Flanges
    Image of Product. Butt Weld: Front. Front orientation. Pipe and Fittings. Low-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. Low-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. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged 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, Forged Flanges, Slip-On Weld Female, Raised Surface.
    Image of Product. Socket Connect: Front. Front orientation. Pipe and Fittings. Low-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. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Flanges, Socket-Connect Female, Raised Surface.

    Butt Weld:

    Front

    Butt Weld:

    Raised

    Surface on

    Back

    Slip-On

    Weld: Front

    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.
    A350 Carbon Steel—Even in temperatures as low as -46° F, these flanges won’t become brittle, so they absorb impact better than other low-pressure steel flanges.
    Pipe
    Size
    Bolt
    Hole
    (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
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N11000000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N1200000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N1300000
    6
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N14000000
     
    Slip-On Weld Female
    1
    		1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N1500000
    1 1/2
    		1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N1600000
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N1700000
    2 1/2
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N1800000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N1900000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N2100000
    6
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N22000000
    8
    		8
    		Raised13 1/2"3/4"7/8"811 3/4"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N23000000
     
    Socket-Connect Female
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N2400000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N2500000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N2600000
     
    Forged Blind Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Blind Flanges, Flanged, Raised.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. Low-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.
    A350 Carbon Steel—Even in temperatures as low as -46° F, these flanges won’t become brittle, so they absorb impact better than other low-pressure steel flanges.
    Bolt
    Hole
    Pipe
    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
    		Raised4 1/2"1/2"5/8"43 1/8"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N27000000
    1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N2800000
    2
    		Raised6"5/8"3/4"44 3/4"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N2900000
    2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N3100000
    3
    		Raised7 1/2"5/8"3/4"46"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N3200000
    4
    		Raised9"5/8"3/4"87 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N3300000
    6
    		Raised11"3/4"7/8"89 1/2"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N34000000
    8
    		Raised13 1/2"3/4"7/8"811 3/4"150
    		A350 Carbon Steel285 psi @ 72° F230 psi @ 300° F5235N35000000
     
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