Pipe Flanges For XXH Pipe Schedule

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How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Front

Raised Surface on Back

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class: 1500
Specifications Met:
1/2 to 2 Pipe Sizes: ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6
All other sizes: ASTM A105
Pipe Nipples and Pipe: Use Schedule 160 or XXH steel
Fittings: Use Class 3000 or 6000 iron and steel

Also known as Pressure Class 1500 flanges, these have the strength to handle high pressures. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are for use in noncorrosive environments.

For technical drawings and 3-D models, click on a part number.

				Bolt Hole
Pipe Size	Dash Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Max. Steam Pressure	Material		Each
NPT
1/2	08	4 3/4"	3/4"	7/8"	4	3 1/4"	3,700 psi @ 72° F	3,200 psi @ 300° F	Steel	0000000	0000000
3/4	12	5 1/8"	3/4"	7/8"	4	3 1/2"	3,700 psi @ 72° F	3,200 psi @ 300° F	Steel	0000000	000000
1	16	5 7/8"	7/8"	1"	4	4"	3,700 psi @ 72° F	3,200 psi @ 300° F	Steel	0000000	000000
1 1/4	20	6 1/4"	7/8"	1"	4	4 3/8"	3,700 psi @ 72° F	3,200 psi @ 300° F	Steel	0000000	000000
1 1/2	24	7"	1"	1 1/8"	4	4 7/8"	3,700 psi @ 72° F	3,200 psi @ 300° F	Steel	0000000	000000
2	32	8 1/2"	7/8"	1"	8	6 1/2"	3,700 psi @ 72° F	3,200 psi @ 300° F	Steel	0000000	000000
3	48	10 1/2"	1 1/4"	1 1/4"	8	8"	Not Rated	Not Rated	Steel	0000000	000000
4	64	12 1/4"	1.38"	1.38"	8	9 1/2"	Not Rated	Not Rated	Steel	0000000	000000

Extreme-Pressure Steel Threaded Pipe Fittings

The strongest steel fittings we offer, these can withstand extreme-pressure applications.

Fittings with intermittent swivel have ball bearings and rotate 360° as needed to allow movement in a rigid metal piping system.

Fittings that swivel until tightened rotate for easy installation. They have a quick-access nut that allows you to perform maintenance without removing the fitting from your line.

Union connectors separate into three pieces so you can access your line without unthreading pipe connections.

Threaded female x butt weld straight adapters are also known as half couplings.

Note: The maximum pressure listed for Class 6000 fittings is for conditions where there are no sudden changes in pressure or velocity. Please refer to ASME B16.11 to determine the specific maximum operating pressure for your application.

For technical drawings and 3-D models, click on a part number.

Straight Connectors

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class : 6000
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

NPT Female
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	04	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	000000
3/8	06	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1/2	08	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	0000
3/4	12	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1	16	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1 1/4	20	6,000 psi @ 72° F	300 psi @ 360° F	Steel	000000000	00000
1 1/2	24	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
2	32	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000

Swivel Straight Connectors

For Use With:
Intermittent Swivel: Coolant, Natural Gas, Water
Swivels Until Tightened: Air, Coolant, Hydraulic Fluid
Temperature Range: -20° to 225° F
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

NPT Female—Intermittent Swivel
Pipe Size	Dash Size	Max. Pressure	Max. Vacuum	Material		Each
2	__	6,000 psi @ 72° F	29 in. of Hg @ 72° F	Steel	00000000	0000000
NPT Female—Swivels Until Tightened
1	16	6,000 psi @ 72° F	20 in. of Hg @ 72° F	Steel	0000000	000000
1 1/4	20	6,000 psi @ 72° F	20 in. of Hg @ 72° F	Steel	0000000	000000

Union Straight Connectors

Exploded View

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class: 6000
Specifications Met: ASME B1.20.1, ASTM A105
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

NPT Female
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	04	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	000000
3/8	06	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1/2	08	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
3/4	12	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1	16	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1 1/4	20	6,000 psi @ 72° F	300 psi @ 360° F	Steel	000000000	000000
1 1/2	24	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	000000
2	32	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	000000

Straight Adapters

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class: 6000
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

NPT Female × Butt Weld
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	04	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
3/8	06	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	0000
1/2	08	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	0000
3/4	12	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	0000
1	16	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	0000
1 1/4	20	6,000 psi @ 72° F	300 psi @ 360° F	Steel	000000000	00000
1 1/2	24	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
2	32	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000

90° Elbow Connectors

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class: 6000
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

NPT Female
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	04	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	000000
3/8	06	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1/2	08	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
3/4	12	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1	16	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1 1/4	20	6,000 psi @ 72° F	300 psi @ 360° F	Steel	000000000	00000
1 1/2	24	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
2	32	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	000000

Swivel 90° Elbow Connectors

For Use With:
Intermittent Swivel: Coolant, Natural Gas, Water
Swivels Until Tightened: Air, Coolant, Hydraulic Fluid
Temperature Range: -20° to 225° F
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

NPT Female—Intermittent Swivel
Pipe Size	Dash Size	Max. Pressure	Max. Vacuum	Material		Each
2	__	6,000 psi @ 72° F	29 in. of Hg @ 72° F	Steel	00000000	000000000
NPT Female—Swivels Until Tightened
1	16	6,000 psi @ 72° F	20 in. of Hg @ 72° F	Steel	0000000	000000
1 1/4	20	6,000 psi @ 72° F	20 in. of Hg @ 72° F	Steel	0000000	000000

Tee Connectors

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class: 6000
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

NPT Female
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	04	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	000000
3/8	06	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1/2	08	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
3/4	12	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1	16	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1 1/4	20	6,000 psi @ 72° F	300 psi @ 360° F	Steel	000000000	00000
1 1/2	24	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	000000
2	32	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	000000

High-Pressure Socket-Connect Steel Unthreaded Pipe Fittings

Socket-connect fittings are easier to weld than butt-weld fittings because the fitting doesn’t need to align perfectly to the pipe. Slide pipe into the socket and weld for a strong, permanent connection. Fittings have heavy duty construction that stands up to high-pressure applications. They are for use in noncorrosive environments.

Union straight connectors separate into three pieces for access to your line. Union straight connectors with gasket provide extra leak protection.

For technical drawings and 3-D models, click on a part number.

Union Straight Connectors with Gasket

For Use With: Air, Water, Oil, Natural Gas, Steam, Hydraulic Fluid
Temperature Range: -20° to 700° F
Specifications Met: MSS SP-83, ASTM A105
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 300 and 600 steel

Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material	Gasket Material		Each
1/2	08	3,000 psi @ 100° F	1,500 psi @ 700° F	Steel	Graphite-Filled 304 Stainless Steel	0000000	0000000
3/4	12	3,000 psi @ 100° F	1,500 psi @ 700° F	Steel	Graphite-Filled 304 Stainless Steel	0000000	000000
1	16	3,000 psi @ 100° F	1,500 psi @ 700° F	Steel	Graphite-Filled 304 Stainless Steel	0000000	00000
1 1/4	20	3,000 psi @ 100° F	1,500 psi @ 700° F	Steel	Graphite-Filled 304 Stainless Steel	0000000	000000
1 1/2	24	3,000 psi @ 100° F	1,500 psi @ 700° F	Steel	Graphite-Filled 304 Stainless Steel	0000000	000000
2	32	3,000 psi @ 100° F	1,500 psi @ 700° F	Steel	Graphite-Filled 304 Stainless Steel	0000000	000000

Extreme-Pressure Socket-Connect Steel Unthreaded Pipe Fittings

Also known as Pressure Class 6000 fittings, these heavy duty forged fittings are the strongest steel fittings we offer. They are easier to weld than butt-weld fittings because the fitting doesn’t need to align perfectly to the pipe. Slide pipe into the socket and weld for a strong, permanent connection. Fittings are for use in noncorrosive environments.

Union straight connectors separate into three pieces for access to your line.

For technical drawings and 3-D models, click on a part number.

Straight Connectors

For Use With: Air, Water, Oil, Natural Gas, Steam, Hydraulic Fluid
Pressure Class: 6000
Specifications Met: ASME B16.11, ASTM A105
Pipe Nipples and Pipe: Use Schedule XXM steel
Flanges: Use 1500 class steel

Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
1/2	08	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
3/4	12	6,000 psi @ 72° F	300 psi @ 360° F	000000000	0000
1	16	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1 1/4	20	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1 1/2	24	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
2	32	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000

Union Straight Connectors

Exploded View

For Use With: Air, Water, Oil, Natural Gas, Steam, Hydraulic Fluid
Pressure Class : 6000
Specifications Met: ASTM A105
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
1/2	08	6,000 psi @ 72° F	300 psi @ 360° F	000000000	000000
3/4	12	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1	16	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1 1/4	20	6,000 psi @ 72° F	300 psi @ 360° F	000000000	000000
1 1/2	24	6,000 psi @ 72° F	300 psi @ 360° F	000000000	000000
2	32	6,000 psi @ 72° F	300 psi @ 360° F	000000000	000000

90° Elbow Connectors

For Use With: Air, Water, Oil, Natural Gas, Steam, Hydraulic Fluid
Pressure Class : 6000
Specifications Met: ASME B16.11, ASTM A105
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
1/2	08	6,000 psi @ 72° F	300 psi @ 360° F	000000000	000000
3/4	12	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1	16	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1 1/4	20	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1 1/2	24	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
2	32	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000

Tee Connectors

For Use With: Air, Water, Oil, Natural Gas, Steam, Hydraulic Fluid
Pressure Class : 6000
Specifications Met: ASME B16.11, ASTM A105
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
1/2	08	6,000 psi @ 72° F	300 psi @ 360° F	000000000	000000
3/4	12	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1	16	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1 1/4	20	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1 1/2	24	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
2	32	6,000 psi @ 72° F	300 psi @ 360° F	000000000	000000

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How to Identify and Measure Fittings

High-Pressure Steel Threaded Pipe Flanges

Extreme-Pressure Steel Threaded Pipe Fittings

High-Pressure Socket-Connect Steel Unthreaded Pipe Fittings

Extreme-Pressure Socket-Connect Steel Unthreaded Pipe Fittings