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    13 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
    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
    8
    		8
    		Raised15"7/8"1"1213"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K3450000000
     
    Slip-On Weld Female
    8
    		8
    		Raised15"7/8"1"1213"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K338000000
     
    Socket-Connect Female
    8
    		8
    		Raised15"7/8"1"1213"300
    		SteelNot RatedNot Rated6806K342000000
     
    Stub-End Female
    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.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    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
    8
    		Raised15"7/8"1"1213"300
    		Steel600 psi @ 72° F300 psi @ 300° F6806K3480000000
     
    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.
    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
    Flange
    OD
    Construction
    Pipe
    Schedule
    Finished
    Material
    Each
    8
    		10 5/8"Seamless80
    		Steel4981T3220000000

    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.
    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
    304/304L
    Stainless Steel
    (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
    Slip-On Weld Female
    8
    		8
    		Raised15"7/8"1"1213"300
    		600 psi @ 72° F300 psi @ 360° F4448T430000000
     
    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
    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
    8
    		Raised15"7/8"1"1213"300
    		600 psi @ 72° F300 psi @ 360° F4448T4800000004452T1160000000
     

    Thin-Wall Butt-Weld Stainless Steel Unthreaded Pipe Stub Ends

    Image of System. Straight Pipe Stub End with Pipe Flange. Front orientation. Pipe Stub Ends. Thin-Wall Butt-Weld Stainless Steel Unthreaded Pipe Stub Ends.
    Image of Product. Straight Adapter. Front orientation. Pipe Stub Ends. Thin-Wall Butt-Weld Stainless Steel Unthreaded Pipe Stub Ends.

    Straight Pipe

    Stub End with

    Pipe Flange

    Straight

    Adapter

    Also known as Schedule 10 pipe stub ends, these are thin and lightweight. They have beveled ends that, when flush to pipe, create a trough for a strong weld that permits maximum flow.
    Pipe stub ends 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—304/304L stainless steel pipe stub ends have very good corrosion resistance.
    316/316L Stainless Steel—316/316L stainless steel pipe stub ends have excellent corrosion resistance.
    Pipe Stub Ends
    Flanges
    For Pipe
    For
    Flange
    Pipe
    Size
    Wall
    Thk.
    Flange
    OD
    Construction
    For Use With
    Specs. Met
    Schedule
    Material
    Class
    Material
    Each
    Each
    Straight Pipe Stub Ends, Butt Weld × Flanged
     
    304/304L Stainless Steel
    12
    		0.156"15"WeldedAir, Natural Gas, Oil, WaterASME B16.9, ASTM A403, MSS SP-4310
    		304 Stainless Steel, 304/304L Stainless Steel
    		150
    		304 Stainless Steel, 304/304L Stainless Steel
    		45735K623000000044685K3270000000
     
    316/316L Stainless Steel
    12
    		0.18"15"WeldedAir, Natural Gas, Oil, WaterASME B16.9, ASTM A403, MSS SP-4310
    		316 Stainless Steel, 316/316L Stainless Steel
    		150
    		316 Stainless Steel, 316/316L Stainless Steel
    		43645K46200000044695K256000000
     
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