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    23,533 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.
    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.

    Butt Weld

    (Front)

    Butt Weld

    (Raised Surface

    on Back)

    Slip-On Weld

    (Front)

    Slip-On Weld

    (Raised

    Surface on

    Back)

    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.
    Image of Product. Stub-End (Front). Front orientation. Contains Annotated. Pipe and Fittings. High-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Flanges, Stub-End Female, Flat Surface.
    Image of Product. Stub-End (Flat Surface on Back). Back orientation. Pipe and Fittings. High-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Flanges, Stub-End Female, Flat Surface.

    Socket Connect (Front)

    Socket-Connect

    (Raised

    Surface on

    Back)

    Stub-End (Front)

    Stub-End (Flat

    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.
    Stub-End Fitting Connection—Stub-end flanges are also known as lap-joint flanges. Use them with a stub-end straight adapter (not included). The stub-end straight adapter slides into the flange and welds to pipe (not the flange). Since the flange isn’t welded to the pipe, it can be disconnected easily for frequent cleaning and inspecting.
    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
    1/2
    		1/2
    		0808Raised3 3/4"1/2"5/8"42 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K346000000
    3/4
    		3/4
    		1212Raised4 5/8"5/8"3/4"43 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K29700000
    1
    		1
    		1616Raised4 7/8"5/8"3/4"43 1/2"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K29800000
    1
    		1
    		1616Raised4.88"3/4"3/4"43 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K44800000
    1 1/4
    		1 1/4
    		2020Raised5 1/4"5/8"3/4"43 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K29900000
    1 1/2
    		1 1/2
    		2424Raised6 1/8"3/4"7/8"44 1/2"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K31100000
    2
    		2
    		3232Raised6 1/2"5/8"3/4"85"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K31200000
    2
    		2
    		3232Raised6 1/2"3/4"3/4"85"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K45100000
    2 1/2
    		2 1/2
    		4040Raised7 1/2"3/4"7/8"85 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K31300000
    3
    		3
    		4848Raised8 1/4"3/4"7/8"86 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K31400000
    3
    		3
    		4848Raised8 1/4"0.88"0.88"86.62"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K45200000
    4
    		4
    		6464Raised10"3/4"7/8"87 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K31500000
    4
    		4
    		6464Raised10 3/4"1"1"88 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K453000000
    5
    		5
    		——Raised11"3/4"7/8"89 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K344000000
    6
    		6
    		9696Raised12 1/2"3/4"7/8"1210 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K316000000
    8
    		8
    		——Raised15"7/8"1"1213"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K345000000
     
    Slip-On Weld Female
    1/2
    		1/2
    		0808Raised3 3/4"1/2"5/8"42 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K33900000
    3/4
    		3/4
    		1212Raised4 5/8"5/8"3/4"43 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K27700000
    1
    		1
    		1616Raised4 7/8"5/8"3/4"43 1/2"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K27800000
    1
    		1
    		1616Raised4.88"3/4"3/4"43 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K43500000
    1 1/4
    		1 1/4
    		2020Raised5 1/4"5/8"3/4"43 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K27900000
    1 1/2
    		1 1/2
    		2424Raised6.12"0.88"0.88"44 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K43600000
    1 1/2
    		1 1/2
    		2424Raised6 1/8"3/4"7/8"44 1/2"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K28100000
    2
    		2
    		3232Raised6 1/2"5/8"3/4"85"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K28200000
    2
    		2
    		3232Raised6 1/2"3/4"3/4"85"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K43700000
    2 1/2
    		2 1/2
    		4040Raised7 1/2"3/4"7/8"85 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K28300000
    3
    		3
    		4848Raised8 1/4"3/4"7/8"86 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K28400000
    3
    		3
    		4848Raised8 1/4"0.88"0.88"86.62"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K43800000
    4
    		4
    		6464Raised10"3/4"7/8"87 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K28500000
    4
    		4
    		6464Raised10 3/4"1"1"88 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K439000000
    5
    		5
    		——Raised11"3/4"7/8"89 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K337000000
    6
    		6
    		9696Raised12 1/2"3/4"7/8"1210 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K286000000
    6
    		6
    		9696Raised14"1.12"1.12"1211 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K441000000
    8
    		8
    		——Raised15"7/8"1"1213"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K338000000
    10
    		10
    		——Raised17 1/2"1.12"1.12"1615 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K413000000
    12
    		12
    		——Raised20 1/2"1 1/4"1 1/4"1617 3/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K414000000
     
    Socket-Connect Female
    1/2
    		1/2
    		0808Raised3 3/4"1/2"5/8"42 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K34300000
    3/4
    		3/4
    		1212Raised4 5/8"5/8"3/4"43 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K28700000
    1
    		1
    		1616Raised4 7/8"5/8"3/4"43 1/2"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K28800000
    1
    		1
    		1616Raised4.88"3/4"3/4"43 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K42800000
    1 1/4
    		1 1/4
    		2020Raised5 1/4"5/8"3/4"43 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K28900000
    1 1/2
    		1 1/2
    		2424Raised6.12"0.88"0.88"44 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K42900000
    1 1/2
    		1 1/2
    		2424Raised6 1/8"3/4"7/8"44 1/2"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K29100000
    2
    		2
    		3232Raised6 1/2"5/8"3/4"85"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K29200000
    2
    		2
    		3232Raised6 1/2"3/4"3/4"85"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K43100000
    2 1/2
    		2 1/2
    		4040Raised7 1/2"3/4"7/8"85 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K29300000
    High-Pressure Steel Unthreaded Pipe Flange, Socket-Connect, 300 Class, 2-1/2 Pipe Size
    EachIn stock
    3
    		3
    		4848Raised8 1/4"3/4"7/8"86 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K29400000
    3
    		3
    		4848Raised8 1/4"0.88"0.88"86.62"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K43200000
    4
    		4
    		6464Raised10"3/4"7/8"87 7/8"300
    		SteelNot RatedNot Rated6806K295000000
    4
    		4
    		6464Raised10 3/4"1"1"88 1/2"600
    		SteelNot RatedNot Rated6806K433000000
    5
    		5
    		——Raised11"3/4"7/8"89 1/4"300
    		SteelNot RatedNot Rated6806K341000000
    6
    		6
    		9696Raised12 1/2"3/4"7/8"1210 5/8"300
    		SteelNot RatedNot Rated6806K296000000
    8
    		8
    		——Raised15"7/8"1"1213"300
    		SteelNot RatedNot Rated6806K342000000
     
    Stub-End Female
    1/2
    		1/2
    		0808Flat3 3/4"1/2"5/8"42 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K35300000
    3/4
    		3/4
    		1212Flat4 5/8"5/8"3/4"43 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K32700000
    1
    		1
    		1616Flat4 7/8"5/8"3/4"43 1/2"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K32800000
    1 1/4
    		1 1/4
    		2020Flat5 1/4"5/8"3/4"43 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K32900000
    1 1/2
    		1 1/2
    		2424Flat6 1/8"3/4"7/8"44 1/2"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K33100000
    2
    		2
    		3232Flat6 1/2"5/8"3/4"85"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K33200000
    2 1/2
    		2 1/2
    		4040Flat7 1/2"3/4"7/8"85 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K33300000
    3
    		3
    		4848Flat8 1/4"3/4"7/8"86 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K33400000
    4
    		4
    		6464Flat10"3/4"7/8"87 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K33500000
    5
    		5
    		——Flat11"3/4"7/8"89 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K351000000
    6
    		6
    		9696Flat12 1/2"3/4"7/8"1210 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K336000000
    8
    		8
    		——Flat15"7/8"1"1213"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K352000000
     
    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.
    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
    1/2
    		08Raised3 3/4"1/2"5/8"42 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K349000000
    3/4
    		12Raised4 5/8"5/8"3/4"43 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K31700000
    1
    		16Raised4 7/8"5/8"3/4"43 1/2"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K31800000
    1
    		16Raised4.88"3/4"3/4"43 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K45500000
    1 1/4
    		20Raised5 1/4"5/8"3/4"43 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K31900000
    1 1/2
    		24Raised6.12"0.88"0.88"44 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K45600000
    1 1/2
    		24Raised6 1/8"3/4"7/8"44 1/2"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K32100000
    2
    		32Raised6 1/2"5/8"3/4"85"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K32200000
    2
    		32Raised6 1/2"3/4"3/4"85"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K45700000
    2 1/2
    		40Raised7 1/2"3/4"7/8"85 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K32300000
    3
    		48Raised8 1/4"3/4"7/8"86 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K32400000
    3
    		48Raised8 1/4"0.88"0.88"86.62"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K45800000
    4
    		64Raised10"3/4"7/8"87 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K32500000
    4
    		64Raised10 3/4"1"1"88 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K459000000
    5
    		—Raised11"3/4"7/8"89 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K347000000
    6
    		96Raised12 1/2"3/4"7/8"1210 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K326000000
    6
    		96Raised14"1.12"1.12"1211 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K461000000
    8
    		—Raised15"7/8"1"1213"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K348000000
    10
    		—Raised17 1/2"1.12"1.12"1615 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K419000000
    12
    		—Raised20 1/2"1 1/4"1 1/4"1617 3/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K421000000
     
    Stub-End Straight Adapters
    Image of Product. Straight Adapter. Front orientation. Pipe Stub Ends. High-Pressure Iron and Steel Unthreaded Pipe Flanges.

    Straight Adapter

    Stub-end straight adapters are used with flanges. Slide a flange onto the stub end and weld the stub end to pipe (not the flange). Since the flange isn’t welded to the pipe, it can be disconnected easily, which creates an access point for frequent cleaning and inspecting.
    Pipe
    Size
    Flange
    OD
    Construction
    Pipe
    Schedule
    Finished
    Material
    Each
    1/2
    		1 3/8"Seamless80
    		Steel4981T211000000
    3/4
    		1 1/16"Seamless80
    		Steel4981T22100000
    1
    		2"Seamless80
    		Steel4981T23100000
    1 1/4
    		2 1/2"Seamless80
    		Steel4981T241000000
    1 1/2
    		2 7/8"Seamless80
    		Steel4981T251000000
    2
    		3 5/8"Seamless80
    		Steel4981T261000000
    2 1/2
    		4 1/8"Seamless80
    		Steel4981T271000000
    3
    		5"Seamless80
    		Steel4981T281000000
    4
    		6 3/16"Seamless80
    		Steel4981T291000000
    5
    		7 5/16"Seamless80
    		Steel4981T311000000
    6
    		8 1/2"Seamless80
    		Steel4981T321000000
    8
    		10 5/8"Seamless80
    		Steel4981T322000000
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