Clear All

	Pipe Size Pipe Size

	Type Type


Flange	Adapter

Cap

	Material Material

Steel

	Connection Style Connection Style

Flanged

Slip-On Weld

Butt Weld

	Flanged Connection Surface Flanged Connection Surface

	Raised

	For Pipe Material For Pipe Material

Steel

	Flange OD Flange OD

4 59/64"

5 33/64"

6 7/64"

	For Pipe Schedule For Pipe Schedule

	40

	Number of Bolt Holes Number of Bolt Holes

	For Use With For Use With

	Bolt Circle Diameter Bolt Circle Diameter

3 35/64"

4 9/64"

4 23/32"

	Shape Shape

	Straight
	Cap/Plug

	Maximum Pressure Maximum Pressure

Not Rated

	Specifications Met Specifications Met	Show

	Specifications Met Specifications Met	Hide

Warning: Products have one, but not necessarily all, of the selected characteristics.

	For Bolt Diameter For Bolt Diameter

5/8"

	Bolt Hole Diameter Bolt Hole Diameter

0.748"

3/4"

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Maximum Steam Pressure Maximum Steam Pressure

Not Rated

	Connection Type Connection Type

	Pipe

	Gender Gender

Female

	Construction Construction

Seamless

	Wall Thickness Wall Thickness

9 Products

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.

Low-Pressure 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.

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.

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

Inch Butt-Weld Flanges

Front

Raised Surface on Back

For Use With: Air, Natural Gas, Oil, Steam, Water
Class: See table
Specifications Met: See table
Certification: See table
Pipe Nipples and Pipe: Use Schedule 40 steel
Fittings: Use Schedule 40 iron or steel

				Bolt Hole
Pipe Size	Wall Thick.	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Construction	Max. Pressure	Max. Steam Pressure	Specifications Met		Each
1	0.144"	4 59/64"	5/8"	0.748"	4	3 35/64"	Seamless	Not Rated	Not Rated	ASTM A105, JIS 10K 25A, JIS B 2220	0000000	000000
1 1/2	0.137"	5 33/64"	5/8"	3/4"	4	4 9/64"	Seamless	Not Rated	Not Rated	ASTM A105, JIS 10K 40A, JIS B 2220	0000000	00000
2	0.157"	6 7/64"	5/8"	3/4"	4	4 23/32"	Seamless	Not Rated	Not Rated	ASTM A105, JIS 10K 50A, JIS B 2220	0000000	00000

Inch Slip-On Weld Flanges

Front

Raised Surface on Back

For Use With: Air, Natural Gas, Oil, Steam, Water
Class: See table
Specifications Met: See table
Certification: See table
Pipe Nipples and Pipe: Use Schedule 40 steel
Fittings: Use Schedule 40 iron or steel

			Bolt Hole
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Max. Steam Pressure	Specifications Met		Each
1	4 59/64"	5/8"	0.748"	4	3 35/64"	Not Rated	Not Rated	ASTM A105, JIS 10K 25A, JIS B 2220	0000000	000000
1 1/2	5 33/64"	5/8"	0.748"	4	4 9/64"	Not Rated	Not Rated	ASTM A105, JIS 10K 40A, JIS B 2220	0000000	00000
2	6 7/64"	5/8"	0.748"	4	4 23/32"	Not Rated	Not Rated	ASTM A105, JIS 10K 50A, JIS B 2220	0000000	00000

Inch Caps

Front

Raised Surface on Back

For Use With: Air, Natural Gas, Oil, Steam, Water
Class: See table
Specifications Met: See table
Certification: Material Certificate with Traceable Lot Number and Test Report
Pipe Nipples and Pipe: Use Schedule 40 steel
Fittings: Use Schedule 40 iron or steel

			Bolt Hole
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Max. Steam Pressure	Specifications Met		Each
1	4 59/64"	5/8"	0.748"	4	3 35/64"	Not Rated	Not Rated	ASTM A105, JIS 10K 25A, JIS B 2220	0000000	000000
1 1/2	5 33/64"	5/8"	0.748"	4	4 9/64"	Not Rated	Not Rated	ASTM A105, JIS 10K 40A, JIS B 2220	0000000	00000
2	6 7/64"	5/8"	0.748"	4	4 23/32"	Not Rated	Not Rated	ASTM A105, JIS 10K 50A, JIS B 2220	0000000	00000