McMaster-Carr

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	Pipe Size Pipe Size

1/4

1/2

3
4
5
6
8
10
12

	Type Type


Flange	Adapter

Reducing Adapter	Cap

	Connection Style Connection Style

	Material Material

Steel

Stainless Steel

	Flanged Connection Surface Flanged Connection Surface


Raised	Flat

	Class Class

150

300

1500

	Flange OD Flange OD

	Maximum Pressure Maximum Pressure

	For Use With For Use With

	Bolt Circle Diameter Bolt Circle Diameter

	For Pipe Material For Pipe Material

Steel

Stainless Steel

	For Bolt Diameter For Bolt Diameter

	Shape Shape

	Straight
	Cap/Plug

	Number of Bolt Holes Number of Bolt Holes

	Maximum Steam Pressure Maximum Steam Pressure

	Fabrication Fabrication

Forged

Cast

	For Pipe Schedule For Pipe Schedule


40	XXH

160

	Bolt Hole Diameter Bolt Hole Diameter

	Specifications Met Specifications Met

ASTM

MSS

ANSI/ASME

	Wall Thickness Wall Thickness

	Dash Size Dash Size

	Socket Depth Socket Depth

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290 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.

High-Pressure Steel
Threaded Pipe Flanges

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

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.

Extreme-Pressure Steel
Unthreaded Pipe Flanges

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

Low-Pressure Stainless
Steel Threaded Pipe Flanges

Also known as Class 150 flanges, these corrosion-resistant flanges are designed for low-pressure pipe applications.

High-Pressure Stainless Steel
Unthreaded Pipe Flanges

Use these heavy duty forged flanges for high-pressure applications.

Low-Pressure Stainless Steel
Unthreaded Pipe Flanges

Bolt two same-size flanges together with a gasket to create an access point within a pipe line.

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How to Identify and Measure Fittings

Metal Pipe and Pipe Fittings

Low-Pressure SteelThreaded Pipe Flanges

High-Pressure SteelThreaded Pipe Flanges

Low-Pressure SteelUnthreaded Pipe Flanges

Extreme-Pressure SteelUnthreaded Pipe Flanges

Low-Pressure StainlessSteel Threaded Pipe Flanges

High-Pressure Stainless SteelUnthreaded Pipe Flanges