Aluminum (Class 125) Threaded Pipe Flanges

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

REACH

Compliant

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Compliant

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4 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Aluminum Unthreaded Pipe Flanges

Also known as Pressure Class 125 flanges, these are for use in low-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are aluminum, which is lightweight with good corrosion resistance.

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 flanges have no internal stop; slide a pipe through the flange and weld on both sides. Cap flanges are also known as blind flanges.

Butt-Weld Flanges

Front

Flat Surface on Back

For Use With: Air, Oil, Water
Pressure Class: 125
Specifications Met: ASME B16.1
Fittings: Use Schedule 40 aluminum
Pipe: Use Schedule 40 aluminum

			Bolt Hole
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure		Each
1/2	3 1/2"	1/2"	5/8"	4	2 3/8"	150 psi @ 72° F	44705K543	000000

Slip-On Weld Flanges

Front

Flat Surface on Back

For Use With: Air, Oil, Water
Pressure Class: 125
Specifications Met: ASME B16.1
Fittings: Use Schedule 40 aluminum
Pipe: Use Schedule 40 aluminum

			Bolt Hole
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure		Each
1/2	3 1/2"	1/2"	5/8"	4	2 3/8"	150 psi @ 72° F	44705K37	000000

Caps

Front

Flat Surface on Back

For Use With: Air, Oil, Water
Pressure Class: 125
Specifications Met: ASME B16.1
Fittings: Use Schedule 40 aluminum
Pipe: Use Schedule 40 aluminum

			Bolt Hole
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure		Each
1/2	3 1/2"	1/2"	5/8"	4	2 3/8"	150 psi @ 72° F	44705K531	000000

Low-Pressure Aluminum Threaded Pipe 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.

Reducing Flanges

Front

Flat Surface on Back

For Use With: Air, Oil, Water
Pressure Class: 125
Specifications Met: ASME B16.1
Fittings: Use Class 150 aluminum
Pipe Nipples and Pipe: Use Schedule 40 aluminum

				Bolt Hole
Pipe Size	For Flange Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure		Each
NPT
1/2	3/4	3 7/8"	1/2"	5/8"	4	2 3/4"	150 psi @ 72° F	44705K712	000000