Pressure Class 6000 Pipe Caps

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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.

Extreme-Pressure Steel Threaded Pipe Fittings

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

Plugs with a round body or a hex body are solid and have a tall head. They’re also known as refinery plugs.

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.

Caps

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 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	00000

Plugs with Round Body

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 steel

NPT Male
Pipe Size	Max. Pressure	Material		Each
1/4	6,000 psi @ 72° F	Steel	0000000	000000
3/8	6,000 psi @ 72° F	Steel	0000000	00000
1/2	6,000 psi @ 72° F	Steel	0000000	00000
3/4	6,000 psi @ 72° F	Steel	0000000	00000
1	6,000 psi @ 72° F	Steel	0000000	00000
1 1/4	6,000 psi @ 72° F	Steel	0000000	00000
1 1/2	6,000 psi @ 72° F	Steel	0000000	00000
2	6,000 psi @ 72° F	Steel	0000000	00000

Plugs with External Hex Drive and Hex Body

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 steel

NPT Male
Pipe Size	Drive Size	Max. Pressure	Material		Each
1/4	5/8"	6,000 psi @ 72° F	Steel	0000000	000000
3/8	7/8"	6,000 psi @ 72° F	Steel	0000000	00000
1/2	7/8"	6,000 psi @ 72° F	Steel	0000000	00000
3/4	1 1/16"	6,000 psi @ 72° F	Steel	0000000	00000
1	1 3/8"	6,000 psi @ 72° F	Steel	0000000	00000
1 1/4	1 3/4"	6,000 psi @ 72° F	Steel	0000000	00000
1 1/2	2"	6,000 psi @ 72° F	Steel	0000000	00000
2	2 1/2"	6,000 psi @ 72° F	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.

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

Caps

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

Extreme-Pressure Steel Unthreaded Pipe Flanges

For excellent strength in extreme-pressure applications, choose these heavy duty Pressure Class 1500 flanges. Bolt two same-size flanges together with a gasket (sold separately) to create an access point in a pipe line. They are for noncorrosive environments.

Cap flanges are also known as blind flanges.

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

Caps

Front

Raised Surface on Back

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class : 1500
Specifications Met: MSS SP-6, MSS SP-25, ASTM A105, ASME B16.5
Certification: Material Certificate with Traceable Lot Number and Test Report
Fittings: Use Class 6000 steel

				Bolt Hole
Pipe Size	Dash Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Max. Steam Pressure	For Pipe Schedule		Each
1/2	08	4 3/4"	3/4"	7/8"	4	3 1/4"	3,700 psi @ 72° F	3,200 psi @ 300° F	Any	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	Any	0000000	000000
1	16	5 7/8"	7/8"	1"	4	4"	3,700 psi @ 72° F	3,200 psi @ 300° F	Any	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	Any	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	Any	0000000	000000
2	32	8 1/2"	7/8"	1"	8	6 1/2"	3,700 psi @ 72° F	3,200 psi @ 300° F	Any	0000000	000000
3	48	10 1/2"	1 1/4"	1 1/4"	8	8"	3,700 psi @ 72° F	3,200 psi @ 300° F	Any	0000000	000000
4	64	12 1/4"	1.38"	1.38"	8	9 1/2"	3,700 psi @ 72° F	3,200 psi @ 300° F	Any	0000000	000000

Extreme-Pressure Socket-Connect Stainless Steel Unthreaded Pipe Fittings

The strongest socket-connect fittings we offer, these heavy duty forged fittings are also known as Pressure Class 6000. 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.

304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.

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

Caps

For Use With: Air, Natural Gas, Oil, Water, Steam
Pressure Class : 6000
Specifications Met: ASME B16.11, ASTM A182, ASME B1.20.1
Pipe: Use Schedule 160 stainless steel

304/304L Stainless Steel
Pipe Size	Max. Pressure	Max. Steam Pressure		Each
1/2	7,700 psi @ 72° F	6,500 psi @ 220° F	0000000	000000
3/4	7,100 psi @ 72° F	5,900 psi @ 220° F	0000000	00000
1	6,400 psi @ 72° F	5,300 psi @ 220° F	0000000	00000
2	4,700 psi @ 72° F	3,900 psi @ 220° F	0000000	000000
316/316L Stainless Steel
3/4	7,100 psi @ 72° F	5,900 psi @ 220° F	0000000	00000
1	6,400 psi @ 72° F	5,300 psi @ 220° F	0000000	00000

SAE Flange Caps

Protect SAE hydraulic flanges during shipping, storing, and finishing applications. Made of polyethylene, these flexible caps are easy to align and push into the center and bolt holes of your flange. All are compatible with BSPP, NPTF, and SAE threads. They can also be used with socket-connect flanges.

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

			For Bolt Hole Center-to-Center
For Pipe Size	Pressure Class	For SAE Flange Size	(A)	(B)	Maximum Temperature, °F	Color	Pkg. Qty.		Pkg.
Polyethylene Plastic
1/2	6000	1/2	0.72"	1.59"	175°	Red	10	0000000	00000
3/4	6000	3/4	0.94"	2"	175°	Red	10	0000000	0000
1	6000	1	1.09"	2 1/4"	175°	Red	10	0000000	00000
1 1/4	6000	1 1/4	1 1/4"	2.63"	175°	Red	10	0000000	00000
1 1/2	6000	1 1/2	1.44"	3.13"	175°	Red	10	0000000	00000
2	6000	2	1 3/4"	3.81"	175°	Red	10	0000000	00000