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    442 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

    Fitting Type

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

    Front

    1/2
    		1/2
    		Raised3 1/2"1/2"5/8"42 3/8"150
    		230 psi @ 72° F44685K21100000044695K191000000
    3/4
    		3/4
    		Raised3 7/8"1/2"5/8"42 3/4"150
    		230 psi @ 72° F44685K2120000044695K19200000
    1
    		1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		230 psi @ 72° F44685K2220000044695K19300000
    1 1/4
    		1 1/4
    		Raised4 5/8"1/2"5/8"43 1/2"150
    		230 psi @ 72° F44685K2230000044695K194000000
    1 1/2
    		1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		230 psi @ 72° F44685K2240000044695K19500000
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		230 psi @ 72° F44685K2250000044695K196000000
    2 1/2
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		230 psi @ 72° F44685K22600000044695K197000000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		230 psi @ 72° F44685K22700000044695K198000000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		230 psi @ 72° F44685K22800000044695K199000000
    6
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		230 psi @ 72° F44685K22900000044695K211000000
    8
    		8
    		Raised13 1/2"3/4"7/8"811 3/4"150
    		230 psi @ 72° F44685K17500000044695K165000000
    10
    		10
    		Raised16"7/8"1"1214 1/4"150
    		230 psi @ 72° F44685K32400000044695K253000000
    12
    		12
    		Raised19"7/8"1"1217"150
    		230 psi @ 72° F44685K325000000———0
     
    Slip-On Weld Female
    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

    1/2
    		1/2
    		Raised3 1/2"1/2"5/8"42 3/8"150
    		230 psi @ 72° F44685K1780000044695K16800000
    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
     
    Socket-Connect Female
    Image of Product. Front. Front orientation. Contains Annotated. Pipe and Fittings. Low-Pressure Stainless Steel Unthreaded Pipe Flanges, Forged Flanges, Socket-Connect Female, Raised Surface.

    Front

    1/2
    		1/2
    		Raised3 1/2"1/2"5/8"42 3/8"150
    		230 psi @ 72° F44685K1890000044695K17900000
    3/4
    		3/4
    		Raised3 7/8"1/2"5/8"42 3/4"150
    		230 psi @ 72° F44685K1910000044695K18100000
    1
    		1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		230 psi @ 72° F44685K1920000044695K18200000
    1 1/4
    		1 1/4
    		Raised4 5/8"1/2"5/8"43 1/2"150
    		230 psi @ 72° F44685K1930000044695K18300000
    1 1/2
    		1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		230 psi @ 72° F44685K1940000044695K18400000
    2
    		2
    		Raised6"5/8"3/4"44 3/4"150
    		230 psi @ 72° F44685K1950000044695K185000000
    2 1/2
    		2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		230 psi @ 72° F44685K19600000044695K186000000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"150
    		230 psi @ 72° F44685K19700000044695K187000000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"150
    		230 psi @ 72° F44685K19800000044695K188000000
    6
    		6
    		Raised11"3/4"7/8"89 1/2"150
    		230 psi @ 72° F44685K19900000044695K189000000
    8
    		8
    		Raised13 1/2"3/4"7/8"811 3/4"150
    		230 psi @ 72° F44685K17400000044695K164000000
     
    Stub End
    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)

    1/2
    		1/2
    		Flat3 1/2"1/2"5/8"42 3/8"150
    		230 psi @ 72° F44685K3110000044695K21200000
    3/4
    		3/4
    		Flat3 7/8"1/2"5/8"42 3/4"150
    		230 psi @ 72° F44685K3120000044695K21300000
    1
    		1
    		Flat4 1/4"1/2"5/8"43 1/8"150
    		230 psi @ 72° F44685K3130000044695K21400000
    1 1/4
    		1 1/4
    		Flat4 5/8"1/2"5/8"43 1/2"150
    		230 psi @ 72° F44685K3140000044695K21500000
    1 1/2
    		1 1/2
    		Flat5"1/2"5/8"43 7/8"150
    		230 psi @ 72° F44685K3150000044695K21600000
    2
    		2
    		Flat6"5/8"3/4"44 3/4"150
    		230 psi @ 72° F44685K3160000044695K21700000
    2 1/2
    		2 1/2
    		Flat7"5/8"3/4"45 1/2"150
    		230 psi @ 72° F44685K31700000044695K218000000
    3
    		3
    		Flat7 1/2"5/8"3/4"46"150
    		230 psi @ 72° F44685K31800000044695K219000000
    4
    		4
    		Flat9"5/8"3/4"87 1/2"150
    		230 psi @ 72° F44685K31900000044695K221000000
    6
    		6
    		Flat11"3/4"7/8"89 1/2"150
    		230 psi @ 72° F44685K16100000044695K151000000
    8
    		8
    		Flat13 1/2"3/4"7/8"811 3/4"150
    		230 psi @ 72° F44685K17600000044695K166000000
    10
    		10
    		Flat16"7/8"1"1214 1/4"150
    		230 psi @ 72° F44685K326000000———0
    12
    		12
    		Flat19"7/8"1"1217"150
    		230 psi @ 72° F44685K32700000044695K256000000
     
    Forged Long-Neck Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Stainless Steel Unthreaded Pipe Flanges, Forged Long-Neck Flanges, Butt Weld, Raised Surface.

    Front

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

    Raised Surface on Back

    Forged flanges have better strength than cast flanges.
    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.
    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.
    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.
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Each
    Butt Weld
    1
    		1
    		Raised4 1/4"1/2"0.62"43 1/8"230 psi @ 72° F175 psi @ 300° F44685K102000000044695K1020000000
    1 1/2
    		1 1/2
    		Raised5"1/2"0.62"43 7/8"230 psi @ 72° F175 psi @ 300° F44685K10300000044695K103000000
    2
    		2
    		Raised6"5/8"3/4"44 3/4"230 psi @ 72° F175 psi @ 300° F44685K10400000044695K104000000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"230 psi @ 72° F175 psi @ 300° F44685K10500000044695K105000000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"230 psi @ 72° F175 psi @ 300° F44685K1060000000044695K10600000000
    6
    		6
    		Raised11"3/4"0.88"89 1/2"230 psi @ 72° F175 psi @ 300° F44685K1070000000044695K10700000000
     
    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.
    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
    1/2
    		Raised3 1/2"1/2"5/8"42 3/8"150
    		230 psi @ 72° F44685K16200000044695K152000000
    3/4
    		Raised3 7/8"1/2"5/8"42 3/4"150
    		230 psi @ 72° F44685K1630000044695K15300000
    1
    		Raised4 1/4"1/2"5/8"43 1/8"150
    		230 psi @ 72° F44685K1640000044695K15400000
    1 1/4
    		Raised4 5/8"1/2"5/8"43 1/2"150
    		230 psi @ 72° F44685K1650000044695K15500000
    1 1/2
    		Raised5"1/2"5/8"43 7/8"150
    		230 psi @ 72° F44685K1660000044695K15600000
    2
    		Raised6"5/8"3/4"44 3/4"150
    		230 psi @ 72° F44685K1670000044695K157000000
    2 1/2
    		Raised7"5/8"3/4"45 1/2"150
    		230 psi @ 72° F44685K16800000044695K158000000
    3
    		Raised7 1/2"5/8"3/4"46"150
    		230 psi @ 72° F44685K16900000044695K159000000
    4
    		Raised9"5/8"3/4"87 1/2"150
    		230 psi @ 72° F44685K17100000044695K161000000
    6
    		Raised11"3/4"7/8"89 1/2"150
    		230 psi @ 72° F44685K17200000044695K162000000
    8
    		Raised13 1/2"3/4"7/8"811 3/4"150
    		230 psi @ 72° F44685K17700000044695K167000000
    10
    		Raised16"7/8"1"1214 1/4"150
    		230 psi @ 72° F44685K32800000044695K257000000
    12
    		Raised19"7/8"1"1217"150
    		230 psi @ 72° F44685K32900000044695K258000000
     
    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
    1/2
    		0.083"1 3/8"Welded10
    		45735K29100000043645K391000000
    1/2
    		0.109"1 3/8"Welded40
    		45605K6510000045555K65100000
    3/4
    		0.083"1 11/16"Welded10
    		45735K2920000043645K39200000
    3/4
    		0.113"1 11/16"Welded40
    		45605K6520000045555K65200000
    1
    		0.109"2"Welded10
    		45735K2930000043645K39300000
    1
    		0.133"2"Welded40
    		45605K6530000045555K65300000
    1 1/4
    		0.109"2 1/2"Welded10
    		45735K2970000043645K15200000
    1 1/4
    		0.14"2 1/2"Welded40
    		45605K6540000045555K65400000
    1 1/2
    		0.109"2 7/8"Welded10
    		45735K2950000043645K39500000
    1 1/2
    		0.145"2 7/8"Welded40
    		45605K6550000045555K65500000
    2
    		0.109"3 5/8"Welded10
    		45735K2960000043645K39600000
    2
    		0.154"3 5/8"Welded40
    		45605K6560000045555K65600000
    2 1/2
    		0.12"4 1/8"Welded10
    		45735K3110000043645K15300000
    2 1/2
    		0.203"4 1/8"Welded40
    		45605K6570000045555K65700000
    3
    		0.12"5"Welded10
    		45735K2980000043645K39800000
    3
    		0.216"5"Welded40
    		45605K6610000045555K66100000
    4
    		0.12"6 3/16"Welded10
    		45735K2990000043645K39900000
    4
    		0.237"6 3/16"Welded40
    		45605K6630000045555K66300000
    6
    		0.134"8 1/2"Welded10
    		45735K31200000043645K154000000
    6
    		0.28"8 1/2"Welded40
    		45605K66500000045555K665000000
    8
    		0.148"10 5/8"Welded10
    		45735K11600000043645K155000000
    8
    		0.322"10 5/8"Welded40
    		45605K53100000045555K615000000
    10
    		0.134"12 3/4"Welded10
    		45735K622000000———0
    12
    		—15"Welded10
    		———043645K462000000
    12
    		0.156"15"Welded10
    		45735K623000000———0

    Low-Pressure Stainless Steel Threaded Pipe Flanges

    Also known as Pressure Class 150 flanges, these are designed for low-pressure pipe 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 within a line.
    Forged Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Stainless Steel Threaded Pipe Flanges, Forged Flanges, Threaded Fitting Connection, Female, Flanged Fitting Connection, Raised Surface.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Stainless Steel Threaded Pipe Flanges, Forged Flanges, Threaded Fitting Connection, Female, Flanged Fitting Connection, Raised Surface.

    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.
    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.
    Max. Steam Pressure
    @ Temp.
    Each
    Each
    NPT Female
    1/2
    		1/2
    		Raised3 1/2"1/2"0.625"42 3/8"150
    		230 psi @ 72° F150 psi @ 360° F44685K1100000044695K11000000
    3/4
    		3/4
    		Raised3 7/8"1/2"0.625"42 3/4"150
    		230 psi @ 72° F150 psi @ 360° F44685K120000044695K1200000
    1
    		1
    		Raised4 1/4"1/2"0.625"43 1/8"150
    		230 psi @ 72° F150 psi @ 360° F44685K130000044695K1300000
    1 1/4
    		1 1/4
    		Raised4 5/8"1/2"0.625"43 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K140000044695K1400000
    1 1/2
    		1 1/2
    		Raised5"1/2"0.625"43 7/8"150
    		230 psi @ 72° F150 psi @ 360° F44685K150000044695K1500000
    2
    		2
    		Raised6"5/8"0.75"44 3/4"150
    		230 psi @ 72° F150 psi @ 360° F44685K160000044695K1600000
    2 1/2
    		2 1/2
    		Raised7"5/8"0.75"45 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K1700000044695K17000000
    3
    		3
    		Raised7 1/2"5/8"0.75"46"150
    		230 psi @ 72° F150 psi @ 360° F44685K1800000044695K18000000
    4
    		4
    		Raised9"5/8"0.75"87 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K1900000044695K19000000
    6
    		6
    		Raised11"3/4"0.875"89 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K2100000044695K21000000
    8
    		8
    		Raised13 1/2"3/4"0.88"811 3/4"150
    		230 psi @ 72° F150 psi @ 360° F44685K32100000044695K25000000
     
    BSPT Female
    1/2
    		1/2
    		Raised3 1/2"1/2"0.62"42 3/8"150
    		230 psi @ 72° F150 psi @ 360° F1384N1100000———0
    3/4
    		3/4
    		Raised3 7/8"1/2"0.62"42 3/4"150
    		230 psi @ 72° F150 psi @ 360° F1384N1200000———0
    1
    		1
    		Raised4 1/4"1/2"0.62"43 1/8"150
    		230 psi @ 72° F150 psi @ 360° F1384N1300000———0
    2
    		2
    		Raised6"5/8"0.75"44 3/4"150
    		230 psi @ 72° F150 psi @ 360° F1384N15000000———0
     
    Forged Reducing Flanges
    Image of ProductInUse. Reducing Flange. Side1 orientation. Contains Annotated. Pipe and Fittings. Low-Pressure Stainless 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 Stainless Steel Threaded Pipe Flanges, Forged Reducing Flanges, Flanged Fitting Connection, Female, Threaded Fitting Connection, Raised Surface.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Stainless Steel Threaded Pipe Flanges, Forged Reducing Flanges, Flanged Fitting Connection, Female, Threaded Fitting Connection, Raised Surface.

    Reducing

    Flange

    Front

    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.
    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
    NPT Female
    1/4
    		1
    		Raised4 1/4"1/2"0.62"43 1/8"150
    		230 psi @ 72° F150 psi @ 360° F44685K33100000044695K26000000
    1/2
    		1
    		Raised4 1/4"1/2"0.625"43 1/8"150
    		230 psi @ 72° F150 psi @ 360° F44685K1410000044695K141000000
    1/2
    		1 1/2
    		Raised5"1/2"0.62"43.88"150
    		230 psi @ 72° F150 psi @ 360° F44685K23100000———0
    1/2
    		2
    		Raised6"5/8"0.75"44 3/4"150
    		230 psi @ 72° F150 psi @ 360° F44685K33500000044695K264000000
    1/2
    		3
    		Raised7 1/2"5/8"0.75"46"150
    		230 psi @ 72° F150 psi @ 360° F44685K232000000———0
    1/2
    		4
    		Raised9"5/8"0.75"87 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K233000000———0
    3/4
    		1
    		Raised4 1/4"1/2"0.625"43 1/8"150
    		230 psi @ 72° F150 psi @ 360° F44685K1420000044695K142000000
    3/4
    		1 1/2
    		Raised5"1/2"0.62"43 7/8"150
    		230 psi @ 72° F150 psi @ 360° F44685K33300000044695K262000000
    3/4
    		2
    		Raised6"5/8"0.75"44 3/4"150
    		230 psi @ 72° F150 psi @ 360° F44685K33600000044695K265000000
    3/4
    		3
    		Raised7 1/2"5/8"0.75"46"150
    		230 psi @ 72° F150 psi @ 360° F44685K234000000———0
    3/4
    		4
    		Raised9"5/8"0.75"87 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K235000000———0
    1
    		1 1/4
    		Raised4 5/8"1/2"0.62"43 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K33200000044695K261000000
    1
    		1 1/2
    		Raised5"1/2"0.625"43 7/8"150
    		230 psi @ 72° F150 psi @ 360° F44685K14300000044695K143000000
    1
    		2
    		Raised6"5/8"0.75"44 3/4"150
    		230 psi @ 72° F150 psi @ 360° F44685K14400000044695K144000000
    1
    		2 1/2
    		Raised7"5/8"0.75"45 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K236000000———0
    1
    		3
    		Raised7 1/2"5/8"0.75"46"150
    		230 psi @ 72° F150 psi @ 360° F44685K237000000———0
    1
    		4
    		Raised9"5/8"0.75"87 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K238000000———0
    1 1/4
    		1 1/2
    		Raised5"1/2"0.62"43 7/8"150
    		230 psi @ 72° F150 psi @ 360° F44685K33400000044695K263000000
    1 1/4
    		2
    		Raised6"5/8"0.75"44 3/4"150
    		230 psi @ 72° F150 psi @ 360° F44685K33700000044695K266000000
    1 1/4
    		4
    		Raised9"5/8"0.75"87 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K239000000———0
    1 1/2
    		2
    		Raised6"5/8"0.75"44 3/4"150
    		230 psi @ 72° F150 psi @ 360° F44685K33800000044695K267000000
    1 1/2
    		2 1/2
    		Raised7"5/8"0.75"45 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K241000000———0
    1 1/2
    		3
    		Raised7 1/2"5/8"0.75"46"150
    		230 psi @ 72° F150 psi @ 360° F44685K242000000———0
    1 1/2
    		4
    		Raised9"5/8"0.75"87 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K243000000———0
    2
    		2 1/2
    		Raised7"1/2"0.62"45 1/2"150
    		230 psi @ 72° F150 psi @ 360° F———044695K268000000
    2
    		2 1/2
    		Raised7"5/8"0.75"45 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K339000000———0
    2
    		3
    		Raised7 1/2"5/8"0.75"46"150
    		230 psi @ 72° F150 psi @ 360° F44685K14500000044695K145000000
    2
    		4
    		Raised9"5/8"0.75"87 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K34100000044695K269000000
    2 1/2
    		3
    		Raised7 1/2"5/8"0.75"46"150
    		230 psi @ 72° F150 psi @ 360° F44685K244000000———0
    2 1/2
    		4
    		Raised9"5/8"0.75"87 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K245000000———0
    3
    		4
    		Raised9"5/8"0.75"87 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K34200000044695K27000000
    4
    		6
    		Raised11"3/4"0.88"89 1/2"150
    		230 psi @ 72° F150 psi @ 360° F44685K34300000044695K271000000
    6
    		8
    		Raised13 1/2"3/4"0.88"811 3/4"150
    		230 psi @ 72° F150 psi @ 360° F44685K246000000———0
     

    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

    High-Pressure Stainless Steel Threaded Pipe Flanges

    Forged for high strength, these heavy duty flanges can handle high-pressure applications. They are also known as ANSI flanges. Bolt two same-size flanges 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. High-Pressure Stainless 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. High-Pressure Stainless 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.
    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
    NPT Female
    1/2
    		1/2
    		0808Raised3 3/4"1/2"0.62"42 5/8"300
    		600 psi @ 72° F300 psi @ 300° F7977K110000007469T31000000
    1/2
    		1/2
    		0808Raised3 3/4"1/2"0.62"42 5/8"600
    		1,200 psi @ 72° F840 psi @ 400° F1441N25000001501N2100000
    3/4
    		3/4
    		1212Raised4 5/8"5/8"0.75"43 1/4"300
    		600 psi @ 72° F300 psi @ 300° F7977K12000007469T3200000
    3/4
    		3/4
    		1212Raised4 5/8"5/8"0.75"43 1/4"600
    		1,200 psi @ 72° F840 psi @ 400° F1441N26000001501N22000000
    1
    		1
    		1616Raised4 7/8"5/8"0.75"43 1/2"300
    		600 psi @ 72° F300 psi @ 300° F7977K13000007469T3300000
    1
    		1
    		1616Raised4 7/8"5/8"0.75"43 1/2"600
    		1,200 psi @ 72° F840 psi @ 400° F1441N270000001501N23000000
    1 1/4
    		1 1/4
    		2020Raised5 1/4"5/8"0.75"43 7/8"300
    		600 psi @ 72° F300 psi @ 300° F7977K14000007469T34000000
    1 1/4
    		1 1/4
    		2020Raised5 1/4"5/8"0.75"43 7/8"600
    		1,200 psi @ 72° F840 psi @ 400° F1441N280000001501N24000000
    1 1/2
    		1 1/2
    		2424Raised6 1/8"3/4"0.88"44 1/2"300
    		600 psi @ 72° F300 psi @ 300° F7977K15000007469T35000000
    1 1/2
    		1 1/2
    		2424Raised6 1/8"3/4"0.88"44 1/2"600
    		1,200 psi @ 72° F840 psi @ 400° F1441N290000001501N25000000
    2
    		2
    		3232Raised6 1/2"5/8"0.75"85"300
    		600 psi @ 72° F300 psi @ 300° F7977K16000007469T36000000
    2
    		2
    		3232Raised6 1/2"5/8"0.75"85"600
    		1,200 psi @ 72° F840 psi @ 400° F1441N310000001501N26000000
    2 1/2
    		2 1/2
    		4040Raised7 1/2"3/4"0.88"85 7/8"300
    		600 psi @ 72° F300 psi @ 300° F7977K170000007469T37000000
    2 1/2
    		2 1/2
    		4040Raised7 1/2"3/4"0.88"85 7/8"600
    		1,200 psi @ 72° F840 psi @ 400° F1441N32000000———0
    3
    		3
    		4848Raised8 1/4"3/4"0.88"86 5/8"300
    		600 psi @ 72° F300 psi @ 300° F7977K180000007469T38000000
    3
    		3
    		4848Raised8 1/4"3/4"0.88"86 5/8"600
    		1,200 psi @ 72° F840 psi @ 400° F1441N330000001501N28000000
    4
    		4
    		6464Raised10"3/4"0.875"87 7/8"300
    		600 psi @ 72° F300 psi @ 300° F7977K190000007469T39000000
    4
    		4
    		6464Raised10 3/4"7/8"1"88 1/2"600
    		1,200 psi @ 72° F840 psi @ 400° F1441N34000000———0
     

    Low-Pressure Stainless Steel Threaded Pipe Fittings

    Use these fittings in a low-pressure pipe line.
    Straight Adapters with Extension for Tanks
    Image of Product. Female × Butt Weld. Front orientation. Pipe and Fittings. Low-Pressure Stainless Steel Threaded Pipe Fittings, Straight Adapters with Extension for Tanks, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female, For Flat Tank Surfaces.

    Female × Butt Weld

    Fittings for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum.
    Adapters with extension fit tightly into the hole, which keeps the fitting steady during welding.
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    316 Stainless Steel—Fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    316 Stainless Steel
    Pipe
    Size
    For Hole
    Diameter (B)
    OD
    For Tank
    Surface (B)
    Max. Pressure
    @ Temp.
    Each
    NPT Female × Butt Weld
    1/4
    		15/16"1 1/2"FlatNot Rated1145K51000000
    3/8
    		15/16"1 1/2"FlatNot Rated1145K5200000
    1/2
    		1 1/8"1 3/4"FlatNot Rated1145K5300000
    3/4
    		1 3/8"2 1/8"FlatNot Rated1145K5400000
    1
    		1 11/16"2 3/8"FlatNot Rated1145K5500000
    1 1/4
    		2"2 11/16"FlatNot Rated1145K5600000
    1 1/2
    		2 1/4"3"FlatNot Rated1145K5700000
    2
    		2 5/8"3 1/2"FlatNot Rated1145K5800000
    2 1/2
    		3 3/16"4 1/16"FlatNot Rated1145K59000000
    3
    		3 11/16"4 5/8"FlatNot Rated1145K61000000
    4
    		4 7/8"5 3/4"FlatNot Rated1145K62000000
     
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