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    120 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. 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.

    Slip-On

    Weld:

    Front

    Slip-On

    Weld:

    Raised

    Surface

    on Back

    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
    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° F68095K398000000
    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 mmSteel230 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 mmSteel230 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 mmSteel230 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 mmSteel230 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
     
    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
    1 1/2
    2
    Raised6"5/8"3/4"44 3/4"150
    Steel285 psi @ 72° F230 psi @ 300° F68095K620000000
    2
    3
    Raised7 1/2"5/8"3/4"46"150
    Steel285 psi @ 72° F230 psi @ 300° F68095K63000000
    3
    4
    Raised9"5/8"3/4"87 1/2"150
    Steel285 psi @ 72° F230 psi @ 300° F68095K64000000
    4
    6
    Raised11"3/4"7/8"89 1/2"150
    Steel285 psi @ 72° F230 psi @ 300° F68095K65000000
    6
    8
    Raised13 1/2"3/4"7/8"811 3/4"150
    Steel285 psi @ 72° F230 psi @ 300° F68095K66000000
     

    Low-Pressure Stainless 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.
    Forged Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Stainless Steel Unthreaded Pipe Flanges, Forged Flanges, Slip-On Weld Female, Raised Surface.

    Front

    Forged flanges have better strength than cast flanges.
    Slip-on-Weld Fitting Connection—Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.
    304/304L Stainless Steel—Flanges hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.
    316/316L Stainless Steel—Flanges are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel flanges, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Pipe
    Size
    Bolt
    Hole
    304/304L
    Stainless Steel
    316/316L
    Stainless Steel
    (A)
    (B)
    Flanged Connection
    Surface (B)
    Flange
    OD
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Pressure
    Class
    Max. Pressure
    @ Temp.
    Each
    Each
    Slip-On Weld Female
    1/2
    1/2
    Raised3 1/2"1/2"5/8"42 3/8"150
    230 psi @ 72° F44685K17800000044695K168000000
    3/4
    3/4
    Raised3 7/8"1/2"5/8"42 3/4"150
    230 psi @ 72° F44685K1790000044695K16900000
    1
    1
    Raised4 1/4"1/2"5/8"43 1/8"150
    230 psi @ 72° F44685K1810000044695K17100000
    1 1/4
    1 1/4
    Raised4 5/8"1/2"5/8"43 1/2"150
    230 psi @ 72° F44685K1820000044695K17200000
    1 1/2
    1 1/2
    Raised5"1/2"5/8"43 7/8"150
    230 psi @ 72° F44685K1830000044695K17300000
    2
    2
    Raised6"5/8"3/4"44 3/4"150
    230 psi @ 72° F44685K1840000044695K17400000
    2 1/2
    2 1/2
    Raised7"5/8"3/4"45 1/2"150
    230 psi @ 72° F44685K18500000044695K175000000
    3
    3
    Raised7 1/2"5/8"3/4"46"150
    230 psi @ 72° F44685K18600000044695K176000000
    4
    4
    Raised9"5/8"3/4"87 1/2"150
    230 psi @ 72° F44685K18700000044695K177000000
    6
    6
    Raised11"3/4"7/8"89 1/2"150
    230 psi @ 72° F44685K18800000044695K178000000
    8
    8
    Raised13 1/2"3/4"7/8"811 3/4"150
    230 psi @ 72° F44685K17300000044695K163000000
    10
    10
    Raised16"7/8"1"1214 1/4"150
    230 psi @ 72° F44685K32200000044695K251000000
    12
    12
    Raised19"7/8"1"1217"150
    230 psi @ 72° F44685K32300000044695K252000000
     
    Forged Reducing Flanges
    Image of ProductInUse. Reducing Flange. Side1 orientation. Contains Annotated. Pipe and Fittings. Low-Pressure Stainless Steel Unthreaded Pipe Flanges, Forged Reducing Flanges, Slip-On Weld Female, Raised Surface.
    Image of Product. Slip-On Front. Front orientation. Pipe and Fittings. Low-Pressure Stainless Steel Unthreaded Pipe Flanges, Forged Reducing Flanges, Slip-On Weld Female, Raised Surface.
    Image of Product. Slip-On Raised Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Stainless Steel Unthreaded Pipe Flanges, Forged Reducing Flanges, Slip-On Weld Female, Raised Surface.

    Reducing

    Flange

    Slip-On Front

    Slip-On

    Raised

    Surface on

    Back

    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.
    Slip-on-Weld Fitting Connection—Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.
    304/304L Stainless Steel—Flanges hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.
    316/316L Stainless Steel—Flanges are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel flanges, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Bolt
    Hole
    304/304L
    Stainless Steel
    316/316L
    Stainless Steel
    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
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Each
    Slip-On Weld Female
    3/4
    1
    Raised4 1/4"1/2"0.62"43 1/8"150
    230 psi @ 72° F150 psi @ 360° F44685K34400000044695K2720000000
    1
    Raised5"1/2"0.62"43 7/8"150
    230 psi @ 72° F150 psi @ 360° F———044695K273000000
    1
    1 1/2
    Raised5"1/2"0.62"43 7/8"150
    230 psi @ 72° F150 psi @ 360° F44685K34500000———0
    1
    2
    Raised6"5/8"3/4"44 3/4"150
    230 psi @ 72° F150 psi @ 360° F44685K13100000044695K131000000
    1 1/2
    2
    Raised6"5/8"3/4"44 3/4"150
    230 psi @ 72° F150 psi @ 360° F44685K34600000044695K274000000
    2
    3
    Raised7 1/2"5/8"3/4"46"150
    230 psi @ 72° F150 psi @ 360° F44685K13200000044695K132000000
    2
    4
    Raised9"5/8"3/4"87"150
    230 psi @ 72° F150 psi @ 360° F44685K34700000044695K275000000
    3
    4
    Raised9"5/8"3/4"87 1/2"150
    230 psi @ 72° F150 psi @ 360° F44685K13300000044695K133000000
    4
    6
    Raised11"3/4"7/8"89 1/2"150
    230 psi @ 72° F150 psi @ 360° F44685K13400000044695K134000000
    6
    8
    Raised13 1/2"3/4"7/8"811 3/4"150
    230 psi @ 72° F150 psi @ 360° F44685K135000000———0
     

    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. 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.

    Slip-On Weld

    (Front)

    Slip-On Weld

    (Raised

    Surface on

    Back)

    Forged flanges have better strength than cast flanges.
    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
    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° F6806K339000000
    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
     

    Extreme-Pressure Iron and Steel Unthreaded Pipe Flanges

    For excellent strength in extreme-pressure applications, choose these heavy duty Pressure Class 1500 flanges. Bolt two same-size flanges together with a gasket (sold separately) to create an access point in a pipe line. They are for noncorrosive environments.
    Forged Flanges
    Image of Product. Slip-On Weld Female: Front. Front orientation. Pipe and Fittings. Extreme-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Flanges, Slip-On Weld Female, Raised Surface.
    Image of Product. Slip-On Weld Female: Raised Surface on Back. Back orientation. Pipe and Fittings. Extreme-Pressure Iron and Steel Unthreaded Pipe Flanges, Forged Flanges, Slip-On Weld Female, Raised Surface.

    Slip-On Weld

    Female: Front

    Slip-On Weld

    Female: Raised

    Surface on Back

    Forged flanges have better strength than cast flanges.
    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
    Slip-On Weld Female
    1
    1
    1616Raised5 7/8"7/8"1"44"1500
    Steel3,700 psi @ 72° F3,200 psi @ 300° F1139T470000000
    2
    2
    3232Raised8 1/2"7/8"1"86 1/2"1500
    Steel3,700 psi @ 72° F3,200 psi @ 300° F1139T51000000
     

    High-Pressure Stainless Steel Unthreaded Pipe Flanges

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

    Slip-On

    Forged flanges have better strength than cast flanges.
    Slip-on-Weld Fitting Connection—Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.
    304/304L Stainless Steel—Flanges hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.
    316/316L Stainless Steel—Flanges are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel flanges, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Pipe
    Size
    Dash
    Size
    Bolt
    Hole
    304/304L
    Stainless Steel
    316/316L
    Stainless Steel
    (A)
    (B)
    (A)
    (B)
    Flanged Connection
    Surface (B)
    Flange
    OD
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Pressure
    Class
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Each
    Slip-On Weld Female
    1/2
    1/2
    0808Raised3 3/4"1/2"0.625"42 5/8"300
    600 psi @ 72° F300 psi @ 360° F4448T2510000004452T261000000
    3/4
    3/4
    1212Raised4 5/8"5/8"0.75"43 1/4"300
    600 psi @ 72° F300 psi @ 360° F4448T252000004452T26200000
    3/4
    3/4
    1212Raised4 5/8"5/8"0.75"43 1/4"600
    1,200 psi @ 72° F840 psi @ 400° F———01503N1200000
    1
    1
    1616Raised4 7/8"5/8"0.75"43 1/2"300
    600 psi @ 72° F300 psi @ 360° F4448T253000004452T26300000
    1
    1
    1616Raised4 7/8"5/8"0.75"43 1/2"600
    1,200 psi @ 72° F840 psi @ 400° F1538N17000001503N1300000
    1 1/4
    1 1/4
    2020Raised5 1/4"5/8"0.75"43 7/8"300
    600 psi @ 72° F300 psi @ 360° F4448T254000004452T264000000
    1 1/2
    1 1/2
    2424Raised6 1/8"3/4"0.875"44 1/2"300
    600 psi @ 72° F300 psi @ 360° F4448T2550000004452T265000000
    1 1/2
    1 1/2
    2424Raised6 1/8"3/4"0.875"44 1/2"600
    1,200 psi @ 72° F840 psi @ 400° F1538N19000000———0
    2
    2
    3232Raised6 1/2"5/8"0.75"85"300
    600 psi @ 72° F300 psi @ 360° F4448T2560000004452T266000000
    2
    2
    3232Raised6 1/2"5/8"0.75"85"600
    1,200 psi @ 72° F840 psi @ 400° F1538N210000001503N16000000
    2 1/2
    2 1/2
    4040Raised7 1/2"3/4"0.875"85 7/8"300
    600 psi @ 72° F300 psi @ 360° F4448T2570000004452T267000000
    3
    3
    4848Raised8 1/4"3/4"0.875"86 5/8"300
    600 psi @ 72° F300 psi @ 360° F4448T2580000004452T268000000
    3
    3
    4848Raised8 1/4"3/4"0.88"86 5/8"600
    1,200 psi @ 72° F840 psi @ 400° F1538N23000000———0
    4
    4
    6464Raised10"3/4"0.875"87 7/8"300
    600 psi @ 72° F300 psi @ 360° F4448T2590000004452T269000000
    4
    4
    6464Raised10 3/4"7/8"1"88 1/2"600
    1,200 psi @ 72° F840 psi @ 400° F1538N24000000———0
    6
    6
    9696Raised12 1/2"3/4"0.875"1210 5/8"300
    600 psi @ 72° F300 psi @ 360° F4448T2610000004452T271000000
    8
    8
    Raised15"7/8"1"1213"300
    600 psi @ 72° F300 psi @ 360° F4448T43000000———0
     
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