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

    Stub End with

    Straight Adapter

    (Front)

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

    Front

    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
    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
    Butt Weld
    12
    		12
    		Raised19"7/8"1"1217"150
    		230 psi @ 72° F44685K3250000000———0
     
    Slip-On Weld Female
    12
    		12
    		Raised19"7/8"1"1217"150
    		230 psi @ 72° F44685K32300000044695K2520000000
     
    Stub End
    12
    		12
    		Flat19"7/8"1"1217"150
    		230 psi @ 72° F44685K32700000044695K256000000
     
    Forged Blind Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Stainless Steel Unthreaded Pipe Flanges, Forged Blind Flanges, Flanged, Raised.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. Low-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.
    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
    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.
    Each
    Each
    Flanged
    12
    		Raised19"7/8"1"1217"150
    		230 psi @ 72° F44685K329000000044695K2580000000
     
    Stub-End Straight Adapters
    Image of Product. Straight Adapter. Front orientation. Pipe Stub Ends. Low-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
    12
    		—15"Welded10
    		———043645K4620000000
    12
    		0.156"15"Welded10
    		45735K6230000000———0

    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 System. Stub-End Flange with Straight Adapter: Front. Front orientation. Contains Annotated. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Flanges, Stub-End Female, Flat Surface.

    Stub-End Flange with Straight

    Adapter: Front

    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. Stub End: Flat Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Flanges, Stub-End Female, Flat Surface.

    Butt Weld:

    Front

    Butt

    Weld:

    Raised

    Surface

    on Back

    Slip-On

    Weld:

    Front

    Slip-On

    Weld:

    Raised

    Surface

    on Back

    Stub End:

    Flat

    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.
    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
    12
    		12
    		Raised19"7/8"1"1217"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K580000000
     
    Slip-On Weld Female
    12
    		12
    		Raised19"7/8"1"1217"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K54000000
     
    Stub-End Female
    12
    		12
    		Flat19"7/8"1"1217"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K56000000
     
    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

    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
    12
    		Raised19"7/8"1"1217"150
    		Steel285 psi @ 72° F150 psi @ 300° F68095K610000000
     

    Thick-Wall Plastic Pipe Flanges for Water

    Also known as Pressure Class 150 flanges, these flanges have thick, strong walls to handle heavy duty industrial plumbing and water supply applications, such as water processing, waste water treatment, and irrigation. They meet NSF/ANSI 61 for drinking water. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. All are PVC, which has good corrosion resistance. Some are also glass filled for extra durability. They meet ASTM D1784 specifications and testing requirements for material quality.
    To prevent leaks in threaded connections, apply a sealant to the male threads. Threaded connections can be taken apart as needed for maintenance and repair. For metal threads, use PTFE tape. For plastic threads, apply a non-hardening, plastic-compatible sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic connections. When making a threaded connection be careful not to overtighten the threads. To prevent cracks and leaks, finger tighten the fitting, then wrench-tighten one to two turns.
    Warning: Never use plastic pipe fittings, flanges, and pipe with compressed air or gas.
    Flanges
    NSF/ANSI 61—To adhere to safety standards for drinking water systems, use pipe that meets NSF/ANSI 61.
    Pipe
    Size
    Bolt
    Hole
    (A)
    (B)
    Flanged Connection
    Surface (B)
    Flange
    OD
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Pressure
    Class
    Material
    Color
    Food Industry
    Std.
    Each
    Cement Socket Female
    12
    		12
    		Raised19"7/8"1"1217"150
    		PVCDark GrayNSF/ANSI 61
    		4881K1030000000
     
    Pipe Cement
    Each
    Pipe Cement for Pipe SIze Greater Than 6 (8-fl. oz. Can)74605A921000000
    Rotating Flanges
    Rotating flanges are also known as Van Stone flanges; they swivel for easy bolt hole alignment.
    NSF/ANSI 61—To adhere to safety standards for drinking water systems, use pipe that meets NSF/ANSI 61.
    Pipe
    Size
    Bolt
    Hole
    (A)
    (B)
    Flanged Connection
    Surface (B)
    Flange
    OD
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Pressure
    Class
    Material
    Color
    Food Industry
    Std.
    Each
    Cement Socket Female
    12
    		12
    		Raised19"7/8"1"1217"150
    		PVCDark GrayNSF/ANSI 61
    		4881K1060000000
     
    Pipe Cement
    Each
    Pipe Cement for Pipe SIze Greater Than 6 (8-fl. oz. Can)74605A921000000
    Blind Flanges
    NSF/ANSI 61—To adhere to safety standards for drinking water systems, use pipe that meets NSF/ANSI 61.
    Bolt
    Hole
    Pipe
    Size
    Flanged Connection
    Surface
    Flange
    OD
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Pressure
    Class
    Material
    Color
    Food Industry
    Std.
    Each
    Flanged
    12
    		Raised19"7/8"1"1217"150
    		PVCLight GrayNSF/ANSI 61
    		4881K1090000000
     

    Pipe Expansion Joints with Flanged Ends

    Image of System. Shown Installed on a Flanged Pipe. Front orientation. Contains Annotated. Pipe Expansion Joints. Pipe Expansion Joints with Flanged Ends.

    Shown Installed on a Flanged Pipe

    These joints reduce stress, vibration, and noise in piping systems by providing a point of flexibility to absorb movement. The flanged ends rotate for easy bolt hole alignment during installation. They mate with a same-size flat-surface Class 150 flange without the need for a gasket. Joints have a flexible body that is reinforced with nylon for added strength.
    Position the expansion joints as close as possible to anchor points.
    Neoprene
    Image of Product. Expansion Joint. Front orientation. Pipe Expansion Joints. Pipe Expansion Joints with Flanged Ends.
    Image of Product. Limit Rod. Front orientation. Pipe Expansion Joint Limit Rods. Pipe Expansion Joints with Flanged Ends.

    Expansion Joint

    Limit Rod

    Limit Rod Sets—Attach limit rod sets (sold separately) to the flanges to prevent overextension where anchoring is insufficient. To accommodate the thickness of the limit rod mounting plate, use bolts that are 7/8" longer than the bolts connecting the expansion joint to the pipe flange. Each set of limit rods requires eight bolts (not included).
    Pipe Expansion Joints
    Limit Rod Sets
    Distance
    Threaded Bolt Holes
    Unthreaded Bolt Holes
    Flange
    OD
    Pipe
    Size
    Lg.
    No. of Bolt
    Holes
    Compression
    Expansion
    Offset
    Max. Pressure
    @ Temp.
    Expansion Joint
    Type
    Flange Material
    Reinforcement
    Material
    For Use With
    Temp. Range,
    ° F
    Max. Vacuum
    @ Temp.
    Bolt Hole
    Thread Size
    Each
    For Bolt
    Dia.
    Each
    Pair
    19"12
    		8"121"5/8"3/4"220 psi @ 72° FSingle BulbZinc-Plated SteelNylon
    		Nonabrasive Slurries, Water-10 to 22026 in. Hg @ 72° F7/8"-9
    		9175K2200000001"9175K2500000009175K920000000
    EPDM
    Image of Product. Expansion Joint. Front orientation. Pipe Expansion Joints. Pipe Expansion Joints with Flanged Ends.
    Image of Product. Limit Rod. Front orientation. Pipe Expansion Joint Limit Rods. Pipe Expansion Joints with Flanged Ends.

    Expansion Joint

    Limit Rod

    Limit Rod Sets—Attach limit rod sets (sold separately) to the flanges to prevent overextension where anchoring is insufficient. To accommodate the thickness of the limit rod mounting plate, use bolts that are 7/8" longer than the bolts connecting the expansion joint to the pipe flange. Each set of limit rods requires eight bolts (not included).
    Pipe Expansion Joints
    Limit Rod Sets
    Distance
    Unthreaded Bolt Holes
    Flange
    OD
    Pipe
    Size
    Lg.
    No. of Bolt
    Holes
    Compression
    Expansion
    Offset
    Max. Pressure
    @ Temp.
    Expansion Joint
    Type
    Flange Material
    Reinforcement
    Material
    For Use With
    Temp. Range,
    ° F
    Max. Vacuum
    @ Temp.
    For Bolt
    Dia.
    Each
    Pair
    19"12
    		8"121"5/8"3/4"220 psi @ 72° FSingle BulbZinc-Plated SteelNylon
    		Alcohol, Water-20 to 25026 in. Hg @ 72° F1"9175K6200000009175K920000000

    High-Temperature All-Metal Pipe Expansion Joints with Flanged Ends

    These all-metal expansion joints can handle higher temperatures than rubber expansion joints. They reduce stress, vibration, and noise in piping systems by providing a point of flexibility to absorb movement. Joints are made of 304 stainless steel for very good corrosion resistance. The flanged ends rotate for easy bolt hole alignment during installation. Flanges mate with a same-size flat-surface Class 150 flange with a gasket (sold separately).
    304 Stainless Steel
    Image of Product. Front orientation. Pipe Expansion Joints. High-Temperature All-Metal Pipe Expansion Joints with Flanged Ends.
    Expansion Joint Liners—Liners (sold separately) slide into the expansion joint to provide a smooth interior for unrestricted flow.
    Pipe Expansion Joints
    Expansion
    Joint Liners
    Distance
    Unthreaded Bolt Holes
    Flange
    OD
    Pipe
    Size
    Lg.
    No. of Bolt
    Holes
    Compression
    Expansion
    Offset
    Max. Pressure
    @ Temp.
    Expansion
    Joint Type
    Flange
    Material
    For Use With
    Temp. Range,
    ° F
    Max. Vacuum
    @ Temp.
    Bolt Hole
    Size
    Each
    Each
    19"12
    		8"121 1/4"3/8"1/8"150 psi @ 72° FBellowSteelAir, Natural Gas, Oil, Steam, Water-20 to 80029 in. Hg @ 72° F1"9413K690000000009413K490000000

    Pipe Expansion Joints with Flanged Ends for High Vibration

    Image of ProductInUse. Shown Installed on a Flanged Pipe. Front orientation. Contains Annotated. Pipe Expansion Joints. Pipe Expansion Joints with Flanged Ends for High Vibration.

    Shown Installed on a Flanged Pipe

    These expansion joints have a double-bulb design for extra movement and vibration absorption. The flanged ends rotate for easy bolt hole alignment during installation. They mate with a same-size flat-surface Class 150 flange without the need for a gasket. Joints have a flexible body that is reinforced with nylon for added strength.
    Neoprene
    Image of Product. Expansion Joint. Front orientation. Pipe Expansion Joints. Pipe Expansion Joints with Flanged Ends for High Vibration.
    Image of Product. Limit Rod. Front orientation. Pipe Expansion Joint Limit Rods. Pipe Expansion Joints with Flanged Ends for High Vibration.

    Expansion Joint

    Limit Rod

    Limit Rod Sets—Attach limit rod sets (sold separately) to the flanges to prevent overextension where anchoring is insufficient. To accommodate the thickness of the limit rod mounting plate, use bolts that are 7/8" longer than the bolts connecting the expansion joint to the pipe flange. Each set of limit rods requires eight bolts (not included).
    Pipe Expansion Joints
    Limit Rod Sets
    Distance
    Threaded Bolt Holes
    Unthreaded Bolt Holes
    Flange
    OD
    Pipe
    Size
    Lg.
    No. of Bolt
    Holes
    Compression
    Expansion
    Offset
    Max. Pressure
    @ Temp.
    Expansion Joint
    Type
    Flange Material
    Reinforcement
    Material
    For Use With
    Temp. Range,
    ° F
    Max. Vacuum
    @ Temp.
    Bolt Hole
    Thread Size
    Each
    Bolt Hole
    Size
    Each
    Pair
    19"12
    		13"122 3/8"1 3/8"1 3/8"220 psi @ 72° FDouble BulbZinc-Plated SteelNylon
    		Grain Alcohol, Nonabrasive Slurries, Water-10 to 22026 in. Hg @ 72° F7/8"-9
    		6819K710000000001"6819K560000000006819K930000000
    EPDM
    Image of Product. Expansion Joint. Front orientation. Pipe Expansion Joints. Pipe Expansion Joints with Flanged Ends for High Vibration.
    Image of Product. Limit Rod. Front orientation. Pipe Expansion Joint Limit Rods. Pipe Expansion Joints with Flanged Ends for High Vibration.

    Expansion Joint

    Limit Rod

    Limit Rod Sets—Attach limit rod sets (sold separately) to the flanges to prevent overextension where anchoring is insufficient. To accommodate the thickness of the limit rod mounting plate, use bolts that are 7/8" longer than the bolts connecting the expansion joint to the pipe flange. Each set of limit rods requires eight bolts (not included).
    Pipe Expansion Joints
    Limit Rod Sets
    Distance
    Unthreaded Bolt Holes
    Flange
    OD
    Pipe
    Size
    Lg.
    No. of Bolt
    Holes
    Compression
    Expansion
    Offset
    Max. Pressure
    @ Temp.
    Expansion Joint
    Type
    Flange Material
    Reinforcement
    Material
    For Use With
    Temp. Range,
    ° F
    Max. Vacuum
    @ Temp.
    Bolt Hole
    Size
    Each
    Pair
    19"12
    		13"122 3/8"1 3/8"1 3/8"220 psi @ 72° FDouble BulbZinc-Plated SteelNylon
    		Alcohol, Water-20 to 25026 in. Hg @ 72° F1"6819K910000000006819K930000000
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