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    162 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 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 System. Stub End with Straight Adapter (Front). Front orientation. Pipe and Fittings. High-Pressure Stainless Steel Unthreaded Pipe Flanges, Forged Flanges, Stub End, Flat Surface.

    Stub End with

    Straight Adapter

    (Front)

    Image of Product. Butt Weld. Front orientation. Pipe and Fittings. High-Pressure Stainless Steel Unthreaded Pipe Flanges, Forged Flanges, Butt Weld, Raised Surface.
    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.
    Image of Product. Socket-Connect. Front orientation. Contains Annotated. Pipe and Fittings. High-Pressure Stainless Steel Unthreaded Pipe Flanges, Forged Flanges, Socket-Connect Female, Raised Surface.

    Butt Weld

    Slip-On

    Socket-Connect

    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.
    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
    Butt Weld
    1/2
    1/2
    0808Raised3 3/4"1/2"0.62"42 5/8"600
    1,200 psi @ 72° F825 psi @ 400° F———01503N31000000
    1/2
    1/2
    0808Raised3 3/4"1/2"0.625"42 5/8"300
    600 psi @ 72° F415 psi @ 360° F4448T2860000004452T29600000
    3/4
    3/4
    1212Raised4 5/8"5/8"0.75"43 1/4"300
    600 psi @ 72° F415 psi @ 360° F4448T287000004452T29700000
    1
    1
    1616Raised4 7/8"5/8"0.75"43 1/2"300
    600 psi @ 72° F415 psi @ 360° F4448T288000004452T29800000
    1
    1
    1616Raised4 7/8"5/8"0.75"43 1/2"600
    1,200 psi @ 72° F825 psi @ 400° F1538N57000001503N33000000
    1 1/4
    1 1/4
    2020Raised5 1/4"5/8"0.75"43 7/8"300
    600 psi @ 72° F415 psi @ 360° F4448T2890000004452T299000000
    1 1/2
    1 1/2
    2424Raised6 1/8"3/4"0.875"44 1/2"300
    600 psi @ 72° F415 psi @ 360° F4448T2910000004452T311000000
    1 1/2
    1 1/2
    2424Raised6 1/8"3/4"0.875"44 1/2"600
    1,200 psi @ 72° F825 psi @ 400° F1538N590000001503N35000000
    2
    2
    3232Raised6 1/2"5/8"0.75"85"300
    600 psi @ 72° F415 psi @ 360° F4448T2920000004452T312000000
    2
    2
    3232Raised6 1/2"5/8"0.75"85"600
    1,200 psi @ 72° F825 psi @ 400° F1538N610000001503N36000000
    2 1/2
    2 1/2
    4040Raised7 1/2"3/4"0.875"85 7/8"300
    600 psi @ 72° F415 psi @ 360° F4448T2930000004452T313000000
    3
    3
    4848Raised8 1/4"3/4"0.875"86 5/8"300
    600 psi @ 72° F415 psi @ 360° F4448T2940000004452T314000000
    3
    3
    4848Raised8 1/4"3/4"0.88"86 5/8"600
    1,200 psi @ 72° F825 psi @ 400° F———01503N38000000
    4
    4
    6464Raised10"3/4"0.875"87 7/8"300
    600 psi @ 72° F415 psi @ 360° F4448T2950000004452T315000000
    4
    4
    6464Raised10 3/4"7/8"1"88 1/2"600
    1,200 psi @ 72° F825 psi @ 400° F1538N64000000———0
    6
    6
    9696Raised12 1/2"3/4"0.875"1210 5/8"300
    600 psi @ 72° F415 psi @ 360° F4448T2960000004452T316000000
     
    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° F4448T251000004452T26100000
    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
     
    Socket-Connect Female
    1/2
    1/2
    0808Raised3 3/4"1/2"0.62"42 5/8"600
    1,200 psi @ 72° F840 psi @ 400° F———01503N2100000
    1/2
    1/2
    0808Raised3 3/4"1/2"0.625"42 5/8"300
    600 psi @ 72° F300 psi @ 360° F4448T264000004452T27400000
    3/4
    3/4
    1212Raised4 5/8"5/8"0.75"43 1/4"300
    600 psi @ 72° F300 psi @ 360° F4448T265000004452T27500000
    3/4
    3/4
    1212Raised4 5/8"5/8"0.75"43 1/4"600
    1,200 psi @ 72° F840 psi @ 400° F———01503N2200000
    1
    1
    1616Raised4 7/8"5/8"0.75"43 1/2"300
    600 psi @ 72° F300 psi @ 360° F4448T266000004452T27600000
    1
    1
    1616Raised4 7/8"5/8"0.75"43 1/2"600
    1,200 psi @ 72° F840 psi @ 400° F1538N37000001503N23000000
    1 1/4
    1 1/4
    2020Raised5 1/4"5/8"0.75"43 7/8"300
    600 psi @ 72° F300 psi @ 360° F4448T2670000004452T277000000
    1 1/2
    1 1/2
    2424Raised6 1/8"3/4"0.875"44 1/2"300
    600 psi @ 72° F300 psi @ 360° F4448T268000004452T278000000
    1 1/2
    1 1/2
    2424Raised6 1/8"3/4"0.875"44 1/2"600
    1,200 psi @ 72° F840 psi @ 400° F1538N390000001503N25000000
    2
    2
    3232Raised6 1/2"5/8"0.75"85"300
    600 psi @ 72° F300 psi @ 360° F4448T2690000004452T279000000
    2
    2
    3232Raised6 1/2"5/8"0.75"85"600
    1,200 psi @ 72° F840 psi @ 400° F1538N410000001503N26000000
    2 1/2
    2 1/2
    4040Raised7 1/2"3/4"0.875"85 7/8"300
    600 psi @ 72° F300 psi @ 360° F4448T271000000———0
    3
    3
    4848Raised8 1/4"3/4"0.875"86 5/8"300
    600 psi @ 72° F300 psi @ 360° F4448T2720000004452T282000000
    3
    3
    4848Raised8 1/4"3/4"0.88"86 5/8"600
    1,200 psi @ 72° F840 psi @ 400° F1538N43000000———0
    4
    4
    6464Raised10"3/4"0.875"87 7/8"300
    600 psi @ 72° F300 psi @ 360° F4448T2730000004452T283000000
    6
    6
    9696Raised12 1/2"3/4"0.875"1210 5/8"300
    600 psi @ 72° F300 psi @ 360° F4448T274000000———0
     
    Stub End
    3/4
    3/4
    1212Flat4 5/8"5/8"0.75"43 1/4"300
    600 psi @ 72° F300 psi @ 360° F4448T29800000———0
    1
    1
    1616Flat4 7/8"5/8"0.75"43 1/2"300
    600 psi @ 72° F300 psi @ 360° F4448T299000004452T31900000
    1
    1
    1616Flat4 7/8"5/8"0.75"43 1/2"600
    1,200 psi @ 72° F840 psi @ 400° F1538N7700000———0
    1 1/2
    1 1/2
    2424Flat6 1/8"3/4"0.875"44 1/2"300
    600 psi @ 72° F300 psi @ 360° F4448T3120000004452T322000000
    2
    2
    3232Flat6 1/2"5/8"0.75"85"300
    600 psi @ 72° F300 psi @ 360° F4448T3130000004452T323000000
    2 1/2
    2 1/2
    4040Flat7 1/2"3/4"0.875"85 7/8"300
    600 psi @ 72° F300 psi @ 360° F4448T3140000004452T324000000
    3
    3
    4848Flat8 1/4"3/4"0.875"86 5/8"300
    600 psi @ 72° F300 psi @ 360° F4448T3150000004452T325000000
    4
    4
    6464Flat10"3/4"0.875"87 7/8"300
    600 psi @ 72° F300 psi @ 360° F4448T262000000———0
    4
    4
    6464Flat10 3/4"7/8"1"88 1/2"600
    1,200 psi @ 72° F840 psi @ 400° F1538N84000000———0
    6
    6
    9696Flat12 1/2"3/4"0.875"1210 5/8"300
    600 psi @ 72° F300 psi @ 360° F4448T263000000———0
     
    Forged Blind Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. High-Pressure Stainless Steel Unthreaded Pipe Flanges, Forged Blind Flanges, Flanged, Raised.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. High-Pressure Stainless Steel Unthreaded Pipe Flanges, Forged Blind Flanges, Flanged, Raised.

    Front

    Raised

    Surface on

    Back

    Forged flanges have better strength than cast flanges.
    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
    Dash
    Size
    Flanged Connection
    Surface
    Flange
    OD
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Pressure
    Class
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Each
    Flanged
    1/2
    08Raised3 3/4"1/2"0.62"42 5/8"600
    1,200 psi @ 72° F840 psi @ 400° F1538N910000001503N51000000
    1/2
    08Raised3 3/4"1/2"0.625"42 5/8"300
    600 psi @ 72° F300 psi @ 360° F4448T275000004452T28500000
    3/4
    12Raised4 5/8"5/8"0.75"43 1/4"300
    600 psi @ 72° F300 psi @ 360° F4448T276000004452T28600000
    3/4
    12Raised4 5/8"5/8"0.75"43 1/4"600
    1,200 psi @ 72° F840 psi @ 400° F1538N9200000———0
    1
    16Raised4 7/8"5/8"0.75"43 1/2"300
    600 psi @ 72° F300 psi @ 360° F4448T277000004452T28700000
    1
    16Raised4 7/8"5/8"0.75"43 1/2"600
    1,200 psi @ 72° F840 psi @ 400° F1538N93000001503N53000000
    1 1/4
    20Raised5 1/4"5/8"0.75"43 7/8"300
    600 psi @ 72° F300 psi @ 360° F4448T278000004452T288000000
    1 1/4
    20Raised5 1/4"5/8"0.75"43 7/8"600
    1,200 psi @ 72° F840 psi @ 400° F1538N94000000———0
    1 1/2
    24Raised6 1/8"3/4"0.875"44 1/2"300
    600 psi @ 72° F300 psi @ 360° F4448T2790000004452T289000000
    1 1/2
    24Raised6 1/8"3/4"0.875"44 1/2"600
    1,200 psi @ 72° F840 psi @ 400° F1538N950000001503N55000000
    2
    32Raised6 1/2"5/8"0.75"85"300
    600 psi @ 72° F300 psi @ 360° F4448T2810000004452T291000000
    2
    32Raised6 1/2"5/8"0.75"85"600
    1,200 psi @ 72° F840 psi @ 400° F1538N960000001503N56000000
    2 1/2
    40Raised7 1/2"3/4"0.875"85 7/8"300
    600 psi @ 72° F300 psi @ 360° F4448T2820000004452T292000000
    2 1/2
    40Raised7 1/2"3/4"0.88"85 7/8"600
    1,200 psi @ 72° F840 psi @ 400° F1538N970000001503N57000000
    3
    48Raised8 1/4"3/4"0.875"86 5/8"300
    600 psi @ 72° F300 psi @ 360° F4448T2830000004452T293000000
    3
    48Raised8 1/4"3/4"0.88"86 5/8"600
    1,200 psi @ 72° F840 psi @ 400° F1538N980000001503N58000000
    4
    64Raised10"3/4"0.875"87 7/8"300
    600 psi @ 72° F300 psi @ 360° F4448T2840000004452T294000000
    4
    64Raised10 3/4"7/8"1"88 1/2"600
    1,200 psi @ 72° F840 psi @ 400° F1538N990000001503N59000000
    6
    96Raised12 1/2"3/4"0.875"1210 5/8"300
    600 psi @ 72° F300 psi @ 360° F4448T2850000004452T295000000
    8
    Raised15"7/8"1"1213"300
    600 psi @ 72° F300 psi @ 360° F4448T480000004452T116000000
    10
    Raised17 1/2"1"1.12"1615 1/4"300
    600 psi @ 72° F300 psi @ 360° F4448T49000000———0
     
    Stub-End Straight Adapters
    Image of Product. Straight Adapter. Front orientation. Pipe Stub Ends. High-Pressure Stainless 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.
    304/304L
    Stainless Steel
    316/316L
    Stainless Steel
    Pipe
    Size
    Wall
    Thk.
    Flange
    OD
    Construction
    Pipe
    Schedule
    Each
    Each
    3/4
    0.113"1 11/16"Welded40
    45605K652000000———0
    1
    0.133"2"Welded40
    45605K6530000045555K653000000
    1 1/2
    0.145"2 7/8"Welded40
    45605K6550000045555K65500000
    2
    0.154"3 5/8"Welded40
    45605K6560000045555K65600000
    2 1/2
    0.203"4 1/8"Welded40
    45605K6570000045555K65700000
    3
    0.216"5"Welded40
    45605K6610000045555K66100000
    4
    0.237"6 3/16"Welded40
    45605K66300000———0
    6
    0.28"8 1/2"Welded40
    45605K665000000———0

    SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges

    Create an access point in a high-pressure hydraulic fluid line with these flanges. They are also known as Code 61 SAE hydraulic flanges. To connect, bolt a flange with an O-ring groove surface to a flange with a flat surface of the same size. Flanges are 316 stainless steel for excellent corrosion resistance.
    Machined Flanges
    Image of Product. Flat Front. Front orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges, Machined Flanges, Socket-Connect Female, Flat Surface.
    Image of Product. Flat Back. Back orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges, Machined Flanges, Socket-Connect Female, Flat Surface.
    Image of Product. O-Ring Groove Front. Front orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges, Machined Flanges, Socket-Connect Female, O-Ring Groove Surface.
    Image of Product. O-Ring Groove Back. Back orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges, Machined Flanges, Socket-Connect Female, O-Ring Groove Surface.

    Flat

    Front

    Flat Back

    O-Ring

    Groove

    Front

    O-Ring

    Groove

    Back

    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.
    Dash
    Size
    Bolt
    Hole
    316/316L
    Stainless Steel
    Pipe Size
    (A)
    SAE Pipe
    Flange Size (B)
    (A)
    (B)
    Flanged Connection
    Surface (B)
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Max. Pressure
    @ Temp.
    Each
    Socket-Connect Female
    3/4
    3/41212Flat3/8"0.406"45,000 psi @ 72° F1431N110000000
    3/4
    3/41212O-Ring Groove3/8"0.406"45,000 psi @ 72° F1431N015000000
    1
    11616Flat3/8"0.406"45,000 psi @ 72° F1431N012000000
    1
    11616O-Ring Groove3/8"0.406"45,000 psi @ 72° F1431N016000000
    1 1/2
    1 1/22424Flat1/2"0.531"43,000 psi @ 72° F1431N013000000
    1 1/2
    1 1/22424O-Ring Groove1/2"0.531"43,000 psi @ 72° F1431N017000000
    2
    23232Flat1/2"0.531"43,000 psi @ 72° F1431N014000000
    2
    23232O-Ring Groove1/2"0.531"43,000 psi @ 72° F1431N018000000
     
    Machined Blind Flanges
    Image of Product. Flat Front. Front orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges, Machined Blind Flanges, Flanged, Flat.
    Image of Product. Flat Back. Back orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges, Machined Blind Flanges, Flanged, Flat.
    Image of Product. O-Ring Groove Front. Front orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges, Machined Blind Flanges, Flanged, O-Ring Groove.
    Image of Product. O-Ring Groove Back. Back orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges, Machined Blind Flanges, Flanged, O-Ring Groove.

    Flat Front

    Flat Back

    O-Ring

    Groove

    Front

    O-Ring

    Groove Back

    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
    316/316L
    Stainless Steel
    SAE Pipe
    Flange Size
    Dash
    Size
    Flanged Connection
    Surface
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Max. Pressure
    @ Temp.
    Each
    Flanged
    232Flat1/2"0.531"43,000 psi @ 72° F1431N0270000000
    232O-Ring Groove1/2"0.531"43,000 psi @ 72° F1431N032000000
     
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