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    187 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

    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.
    Image of Product. Socket Connect: Front. Front orientation. Contains Annotated. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, 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, 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

    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
    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
    		Raised3 1/2"1/2"5/8"42 3/8"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K415000000
    3/4
    		3/4
    		Raised3 7/8"1/2"5/8"42 3/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K36400000
    1
    		1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K36500000
    1
    		1
    		Raised115 mm12 mm14 mm485 mm—Steel230 psi @ 72° F180 psi @ 300° F1132T1100000
    1 1/4
    		1 1/4
    		Raised4 5/8"1/2"5/8"43 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K36700000
    1 1/2
    		1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K36800000
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K36900000
    2
    		2
    		Raised165 mm16 mm18 mm4125 mm—Steel230 psi @ 72° F180 psi @ 300° F1132T1200000
    2 1/2
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K37100000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K37200000
    3
    		3
    		Raised200 mm16 mm18 mm8160 mm—Steel230 psi @ 72° F180 psi @ 300° F1132T1300000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K37300000
    4
    		4
    		Raised220 mm16 mm18 mm8180 mm—Steel230 psi @ 72° F180 psi @ 300° F1132T1400000
    5
    		5
    		Raised10"3/4"7/8"88 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K41300000
    6
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K37400000
    8
    		8
    		Raised13 1/2"3/4"7/8"811 3/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K414000000
    10
    		10
    		Raised16"7/8"1"1214 1/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K57000000
    12
    		12
    		Raised19"7/8"1"1217"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K58000000
     
    Slip-On Weld Female
    1/2
    		1/2
    		Raised3 1/2"1/2"5/8"42 3/8"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K39800000
    3/4
    		3/4
    		Raised3 7/8"1/2"5/8"42 3/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K34400000
    1
    		1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K34500000
    1
    		1
    		Raised4 59/64"5/8"0.748"43 35/64"—SteelNot RatedNot Rated1752N1400000
    1
    		1
    		Raised115 mm12 mm14 mm485 mm—Steel230 psi @ 72° F180 psi @ 300° F1132T1900000
    1 1/4
    		1 1/4
    		Raised4 5/8"1/2"5/8"43 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K34600000
    1 1/2
    		1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K34700000
    1 1/2
    		1 1/2
    		Raised5 33/64"5/8"0.748"44 9/64"—SteelNot RatedNot Rated1752N1500000
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K34800000
    2
    		2
    		Raised6 7/64"5/8"0.748"44 23/32"—SteelNot RatedNot Rated1752N1600000
    2
    		2
    		Raised165 mm16 mm18 mm4125 mm—Steel230 psi @ 72° F180 psi @ 300° F1132T2100000
    2 1/2
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K34900000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K35100000
    3
    		3
    		Raised200 mm16 mm18 mm8160 mm—Steel230 psi @ 72° F180 psi @ 300° F1132T2200000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K35200000
    4
    		4
    		Raised220 mm16 mm18 mm8180 mm—Steel230 psi @ 72° F180 psi @ 300° F1132T2300000
    5
    		5
    		Raised10"3/4"7/8"88 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K39600000
    6
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K35300000
    8
    		8
    		Raised13 1/2"3/4"7/8"811 3/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K397000000
    10
    		10
    		Raised16"7/8"1"1214 1/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K53000000
    12
    		12
    		Raised19"7/8"1"1217"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K54000000
     
    Socket-Connect Female
    1/2
    		1/2
    		Raised3 1/2"1/2"5/8"42 3/8"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K41200000
    3/4
    		3/4
    		Raised3 7/8"1/2"5/8"42 3/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K35400000
    1
    		1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K35500000
    1 1/4
    		1 1/4
    		Raised4 5/8"1/2"5/8"43 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K35600000
    1 1/2
    		1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K35700000
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K35800000
    2 1/2
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K35900000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K36100000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K36200000
    5
    		5
    		Raised10"3/4"7/8"88 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K39900000
    6
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K36300000
    8
    		8
    		Raised13 1/2"3/4"7/8"811 3/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K411000000
    10
    		10
    		Raised16"7/8"1"1214 1/4"150
    		Steel285 psi @ 72° FNot Rated68095K51000000
     
    Long-Neck Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Long-Neck Flanges, Butt Weld, Raised Surface.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Long-Neck Flanges, Butt Weld, Raised Surface.

    Front

    Raised Surface on

    Back

    Long-neck weld flanges have a square-cut end for welding directly to a pressure vessel or tank. With a longer neck than butt-weld flanges, they stick out farther from your tank wall for easier access to bolts. These flanges eliminate the need to weld a flange to a length of pipe.
    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.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    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
    1
    		1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K1810000000
    1 1/2
    		1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K182000000
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K183000000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K184000000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K185000000
    6
    		6
    		Raised11"3/4"1"89 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K186000000
     
    Reducing Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Reducing Flanges, Slip-On Weld Female, Raised Surface.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Reducing Flanges, Slip-On Weld Female, Raised Surface.

    Front

    Raised

    Surface on

    Back

    Reducing flanges allow you to transition your system to a smaller pipe size; attach to a flange with a larger pipe size but with the same flange dimensions.
    Slip-on-Weld Fitting Connection—Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.
    Bolt
    Hole
    Pipe Size
    (A)
    For Flange
    Pipe Size (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
    Slip-On Weld Female
    3/4
    		1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K187000000
    1
    		1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K18800000
    1
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K18900000
    2
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K191000000
     
    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
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Pressure
    Class
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Flanged
    1/2
    		Raised3 1/2"1/2"5/8"42 3/8"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K418000000
    3/4
    		Raised3 7/8"1/2"5/8"42 3/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K37500000
    1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K37600000
    1
    		Raised4 59/64"5/8"0.748"43 35/64"—SteelNot RatedNot Rated1752N1700000
    1
    		Raised115 mm12 mm14 mm485 mm—Steel230 psi @ 72° F180 psi @ 300° F1132T1500000
    1 1/4
    		Raised4 5/8"1/2"5/8"43 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K37700000
    1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K37800000
    1 1/2
    		Raised5 33/64"5/8"0.748"44 9/64"—SteelNot RatedNot Rated1752N1800000
    2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K37900000
    2
    		Raised165 mm16 mm18 mm4125 mm—Steel230 psi @ 72° F180 psi @ 300° F1132T1600000
    2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K38100000
    3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K38200000
    3
    		Raised200 mm16 mm18 mm8160 mm—Steel230 psi @ 72° F180 psi @ 300° F1132T1700000
    4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K38300000
    4
    		Raised220 mm16 mm18 mm8180 mm—Steel230 psi @ 72° F180 psi @ 300° F1132T1800000
    5
    		Raised10"3/4"7/8"88 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K41600000
    6
    		Raised11"3/4"7/8"89 1/2"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K38400000
    8
    		Raised13 1/2"3/4"7/8"811 3/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K417000000
    10
    		Raised16"7/8"1"1214 1/4"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K59000000
    12
    		Raised19"7/8"1"1217"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K61000000
     

    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.
    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
    		Steel285 psi @ 72° F230 psi @ 300° F68095K226000000
    3/4
    		3/4
    		Raised3 7/8"1/2"5/8"42 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K12100000
    1
    		1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K12200000
    1 1/4
    		1 1/4
    		Raised4 5/8"1/2"5/8"43 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K12300000
    1 1/2
    		1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K12400000
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K12500000
    2 1/2
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K12600000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K12700000
    3 1/2
    		3 1/2
    		Raised8 1/2"5/8"3/4"87"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K444000000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K12800000
    5
    		5
    		Raised10"3/4"7/8"88 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K22200000
    6
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K12900000
    8
    		8
    		Raised13 1/2"3/4"7/8"811 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F68095K223000000
     
    BSPT Female
    1/2
    		1/2
    		Raised3 1/2"1/2"5/8"42 3/8"150
    		Steel285 psi @ 72° F230 psi @ 300° F8128K1100000
    3/4
    		3/4
    		Raised3 7/8"1/2"5/8"42 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F8128K1200000
    1
    		1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		Steel285 psi @ 72° F230 psi @ 300° F8128K1300000
    1 1/4
    		1 1/4
    		Raised4 5/8"1/2"5/8"43 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F8128K1400000
    1 1/2
    		1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		Steel285 psi @ 72° F230 psi @ 300° F8128K1500000
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F8128K16000000
    2 1/2
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F8128K17000000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F230 psi @ 300° F8128K18000000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F8128K21000000
    6
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F8128K23000000
     
    Forged Reducing Flanges
    Image of ProductInUse. Reducing Flange. Side1 orientation. Contains Annotated. Pipe and Fittings. Low-Pressure Iron and Steel Threaded Pipe Flanges, Forged Reducing Flanges, Flanged Fitting Connection, Female, Threaded Fitting Connection, Raised Surface.
    Image of Product. Raised Surface on Back. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Threaded Pipe Flanges, Forged Reducing Flanges, Flanged Fitting Connection, Female, Threaded Fitting Connection, Raised Surface.
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Threaded Pipe Flanges, Forged Reducing Flanges, Flanged Fitting Connection, Female, Threaded Fitting Connection, Raised Surface.

    Reducing

    Flange

    Raised

    Surface on

    Back

    Front

    Forged flanges have better strength than cast flanges.
    Reducing flanges allow you to transition your system to a smaller pipe size; attach to a flange with a larger pipe size but with the same flange dimensions.
    Bolt
    Hole
    Pipe Size
    (A)
    For Flange
    Pipe Size (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
    1/4
    		1
    		Raised4 1/4"1/2"5/8"43.12"150
    		SteelNot Rated—1802N11000000
    1/2
    		3/4
    		Raised3 7/8"1/2"5/8"42 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N2900000
    1/2
    		1
    		Raised4 1/4"1/2"5/8"43.12"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N1200000
    1/2
    		1 1/2
    		Raised5"1/2"5/8"43.88"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N3100000
    1/2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N18000000
    1/2
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N41000000
    1/2
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N47000000
    3/4
    		1
    		Raised4 1/4"1/2"5/8"43.12"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N1300000
    3/4
    		1 1/2
    		Raised5"1/2"5/8"43.88"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N1500000
    3/4
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N19000000
    3/4
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N39000000
    3/4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N46000000
    1
    		1 1/4
    		Raised4 5/8"1/2"5/8"43 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N14000000
    1
    		1 1/2
    		Raised5"1/2"5/8"43.88"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N1600000
    1
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N21000000
    1
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N34000000
    1
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N38000000
    1
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N45000000
    1 1/4
    		1 1/2
    		Raised5"1/2"5/8"43.88"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N1700000
    1 1/4
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N22000000
    1 1/4
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N37000000
    1 1/4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N44000000
    1 1/2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N23000000
    1 1/2
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N32000000
    1 1/2
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N36000000
    1 1/2
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N43000000
    2
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N24000000
    2
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N25000000
    2
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N26000000
    2
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F8128K102000000
    2 1/2
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N35000000
    2 1/2
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N42000000
    3
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N27000000
    3
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F8128K101000000
    4
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N28000000
    5
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N48000000
    6
    		8
    		Raised13 1/2"3/4"7/8"811 3/4"150
    		Steel285 psi @ 72° F230 psi @ 300° F1802N49000000
     

    High-Pressure Iron and Steel Threaded Pipe Flanges

    With better strength than our low-pressure steel flanges, these are for use in high-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are also known as Pressure Class 300 or Pressure Class 600 flanges. Use in noncorrosive environments.
    Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. High-Pressure Iron and Steel Threaded Pipe Flanges, Flanges, Flanged Fitting Connection, Female, Threaded Fitting Connection, Raised Surface.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. High-Pressure Iron and Steel Threaded Pipe Flanges, Flanges, Flanged Fitting Connection, Female, Threaded Fitting Connection, Raised Surface.

    Front

    Raised

    Surface on

    Back

    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 3/4"1/2"5/8"42 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K226000000
    3/4
    		3/4
    		Raised4 5/8"5/8"3/4"43 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K12100000
    1
    		1
    		Raised4 7/8"5/8"3/4"43 1/2"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K12200000
    1
    		1
    		Raised4 7/8"3/4"3/4"43 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K42200000
    1 1/4
    		1 1/4
    		Raised5 1/4"5/8"3/4"43 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K12300000
    1 1/2
    		1 1/2
    		Raised6 1/8"3/4"7/8"44 1/2"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K12400000
    1 1/2
    		1 1/2
    		Raised6 1/8"7/8"0.88"44 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K42300000
    2
    		2
    		Raised6 1/2"5/8"3/4"85"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K12500000
    2
    		2
    		Raised6 1/2"3/4"3/4"85"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K42400000
    2 1/2
    		2 1/2
    		Raised7 1/2"3/4"7/8"85 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K12600000
    3
    		3
    		Raised8 1/4"3/4"7/8"86 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K12700000
    3
    		3
    		Raised8 1/4"7/8"0.88"86.62"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K425000000
    4
    		4
    		Raised10"3/4"7/8"87 7/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K12800000
    4
    		4
    		Raised10 3/4"1"1"88 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K426000000
    5
    		5
    		Raised11"3/4"7/8"89 1/4"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K222000000
    6
    		6
    		Raised12 1/2"3/4"7/8"1210 5/8"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K129000000
    6
    		6
    		Raised14"1 1/8"1.12"1211 1/2"600
    		Steel1,400 psi @ 72° F1,300 psi @ 300° F6806K427000000
     

    High-Pressure Galvanized Iron and Steel Threaded Pipe Flanges

    A galvanized finish gives these flanges fair corrosion resistance. Also known as Pressure Class 300 flanges, they can withstand medium-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line.
    Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. High-Pressure Galvanized Iron and Steel Threaded Pipe Flanges, Flanges, Flanged Fitting Connection, Female, Threaded Fitting Connection, Raised Surface.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. High-Pressure Galvanized Iron and Steel Threaded Pipe Flanges, Flanges, Flanged Fitting Connection, Female, Threaded Fitting Connection, Raised Surface.

    Front

    Raised

    Surface on

    Back

    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
    3/4
    		3/4
    		Raised4 5/8"3/4"3/4"43 1/4"300
    		Galvanized Steel600 psi @ 72° FNot Rated1733N120000000
    1
    		1
    		Raised4 7/8"3/4"3/4"43 1/2"300
    		Galvanized Steel600 psi @ 72° FNot Rated1733N1300000
    1 1/4
    		1 1/4
    		Raised5 1/4"3/4"3/4"43 7/8"300
    		Galvanized Steel600 psi @ 72° FNot Rated1733N14000000
    1 1/2
    		1 1/2
    		Raised6 1/8"7/8"0.88"44 1/2"300
    		Galvanized Steel600 psi @ 72° FNot Rated1733N1500000
    2
    		2
    		Raised6 1/2"3/4"3/4"85"300
    		Galvanized Steel600 psi @ 72° FNot Rated1733N16000000
    3
    		3
    		Raised8 1/4"7/8"0.88"86 5/8"300
    		Galvanized Steel600 psi @ 72° FNot Rated1733N17000000
    4
    		4
    		Raised10"7/8"0.88"87 7/8"300
    		Galvanized Steel600 psi @ 72° FNot Rated1733N18000000
     

    Extreme-Pressure Iron and Steel Threaded Pipe Flanges

    Also known as Pressure Class 1500 flanges, these have the strength to handle high pressures. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are for use in noncorrosive environments.
    Forged Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Extreme-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. Extreme-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.
    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
    NPT Female
    1/2
    		1/2
    		0808Raised4 3/4"3/4"7/8"43 1/4"1500
    		Steel3,700 psi @ 72° F3,200 psi @ 300° F1153T410000000
    3/4
    		3/4
    		1212Raised5 1/8"3/4"7/8"43 1/2"1500
    		Steel3,700 psi @ 72° F3,200 psi @ 300° F1153T42000000
    1
    		1
    		1616Raised5 7/8"7/8"1"44"1500
    		Steel3,700 psi @ 72° F3,200 psi @ 300° F1153T43000000
    1 1/4
    		1 1/4
    		2020Raised6 1/4"7/8"1"44 3/8"1500
    		Steel3,700 psi @ 72° F3,200 psi @ 300° F1153T44000000
    1 1/2
    		1 1/2
    		2424Raised7"1"1 1/8"44 7/8"1500
    		Steel3,700 psi @ 72° F3,200 psi @ 300° F1153T45000000
    2
    		2
    		3232Raised8 1/2"7/8"1"86 1/2"1500
    		Steel3,700 psi @ 72° F3,200 psi @ 300° F1153T46000000
    3
    		3
    		4848Raised10 1/2"1 1/4"1 1/4"88"1500
    		SteelNot RatedNot Rated1153T47000000
    4
    		4
    		6464Raised12 1/4"1.38"1.38"89 1/2"1500
    		SteelNot RatedNot Rated1153T48000000
     

    Low-Pressure Galvanized Iron and Steel Threaded Pipe Flanges

    The galvanized finish on these flanges provides fair corrosion resistance. Also known as Pressure Class 150 flanges, they 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
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Galvanized Iron and Steel Threaded Pipe Flanges, Flanges, Threaded Fitting Connection, Female, Flanged Fitting Connection, Raised Surface.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Galvanized Iron and Steel Threaded Pipe Flanges, Flanges, Threaded Fitting Connection, Female, Flanged Fitting Connection, Raised Surface.

    Front

    Raised

    Surface on

    Back

    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
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F7551K119000000
    3/4
    		3/4
    		Raised3 7/8"1/2"5/8"42 3/4"150
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F7551K12100000
    1
    		1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F7551K12200000
    1 1/4
    		1 1/4
    		Raised4 5/8"1/2"5/8"43 1/2"150
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F7551K12300000
    1 1/2
    		1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F7551K12400000
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F7551K12500000
    2 1/2
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F7551K12600000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F7551K12700000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F7551K128000000
    5
    		5
    		Raised10"3/4"7/8"88 1/2"150
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F7551K129000000
    6
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F7551K131000000
    8
    		8
    		Raised13 1/2"3/4"7/8"811 3/4"150
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F7551K133000000
     
    BSPT Female
    2
    		2
    		Raised6"3/4"3/4"44 3/4"150
    		Galvanized Steel285 psi @ 72° F150 psi @ 300° F1584N5000000
     
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