Iron and Steel ASME-Code Pipe Flanges

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	Pipe Size Pipe Size

1/4

1/2

3
4
5
6
8
10
12

	Thread Type Thread Type

NPT

BSPT

	Type Type


Flange	Adapter

Reducing Adapter	Cap

	Connection Style Connection Style

	Material Material

Steel

Iron

	Flanged Connection Surface Flanged Connection Surface


Raised	Flat

	Class Class

	Maximum Pressure Maximum Pressure

	For Use With For Use With

	Flange OD Flange OD

	Bolt Circle Diameter Bolt Circle Diameter

	For Bolt Diameter For Bolt Diameter

	Number of Bolt Holes Number of Bolt Holes

	Finish Finish

Black Coated

Galvanized

Zinc Plated

	Maximum Steam Pressure Maximum Steam Pressure

	Shape Shape

	Straight
	Cap/Plug

	For Pipe Schedule For Pipe Schedule


40	80

160	XXH

	Fabrication Fabrication

Forged

Cast

	Specifications Met Specifications Met

ASTM

ANSI/ASME

MSS

International Fuel Gas Code

Uniform Mechanical Code

UPC

	Bolt Hole Diameter Bolt Hole Diameter

	Wall Thickness Wall Thickness

	Length Length

	Dash Size Dash Size

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303 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.

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How to Identify and Measure Fittings

Iron and Steel Threaded Pipe and Pipe Fittings

Low-Pressure SteelThreaded Pipe Flanges

FM-Approved Low-PressureCast Iron Threaded Pipe Flanges

Low-Pressure GalvanizedSteel Threaded Pipe Flanges

Medium-Pressure SteelThreaded Pipe Flanges

Medium-Pressure GalvanizedSteel Threaded Pipe Flanges

High-Pressure SteelThreaded Pipe Flanges