Iron and Steel ANSI Pipe Flanges

	Pipe Size Pipe Size

1/4
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6
8
10
12

	Type Type


Flange	Adapter

Cap	Reducing Adapter

	Connection Style Connection Style

	Material Material

Steel

Iron

	Class Class

	Flanged Connection Surface Flanged Connection Surface


Raised	Flat

	For Pipe Schedule For Pipe Schedule

160

Any

XXH

	Flange OD Flange OD

	Number of Bolt Holes Number of Bolt Holes

	For Use With For Use With

	Bolt Circle Diameter Bolt Circle Diameter

	Specifications Met Specifications Met

International Fuel Gas Code

Uniform Mechanical Code

UPC

	Thread Type Thread Type

NPT

BSPT

	For Bolt Diameter For Bolt Diameter

	Maximum Steam Pressure Maximum Steam Pressure

	Shape Shape

	Straight
	Cap/Plug

	Maximum Pressure Maximum Pressure

	Bolt Hole Diameter Bolt Hole Diameter

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

DFARS Specialty Metals
COTS-Exempt

	Finish Finish

Black Coated

Galvanized

Zinc Plated

	Fabrication Fabrication

Forged

Cast

	Dash Size Dash Size

	Socket Connect Type Socket Connect Type


Weld	Press

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328 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 Threaded Pipe Flanges

These flanges are for low-pressure applications in noncorrosive environments.

FM-Approved Low-Pressure Cast
Iron Threaded Pipe Flanges

Low-Pressure Galvanized Steel Threaded Pipe Flanges

The galvanized finish on these Class 150 flanges provides fair corrosion resistance.

Medium-Pressure Steel Threaded Pipe Flanges

With better strength than our low-pressure steel flanges, these are for use in medium-pressure applications.

Medium-Pressure Galvanized
Steel Threaded Pipe Flanges

Also known as Class 300 flanges, these medium-pressure flanges have a galvanized finish for fair corrosion resistance.

High-Pressure Steel Threaded Pipe Flanges

Also known as Class 1500 steel flanges, these have the strength to handle high pressures.

Iron and Steel Unthreaded Pipe and Pipe Fittings

Low-Pressure Steel Unthreaded Pipe Flanges

Bolt two flanges of the same size together with a gasket to create an access point in a pipe line.

Low-Pressure Press-Connect
Steel Unthreaded Pipe Fittings

Crimp these fittings onto steel pipe to form a tightly sealed connection that’s faster than threading or welding and doesn’t require heat.

High-Pressure Steel Unthreaded Pipe Flanges

Forged for extra strength, these heavy duty unthreaded flanges can withstand high-pressure applications.

Extreme-Pressure Steel Unthreaded Pipe Flanges

For excellent strength in extreme-pressure applications, choose these heavy duty Class 1500 flanges.