Weld Flanges | McMaster-Carr

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Fitting Connection

Tank Connection Method

Weld On

System of Measurement

Pipe Size

Material

Compressed Non-Asbestos Synthetic Fiber

Pressure Class

Fitting Type

Pipe Schedule

Any

Flanged Connection Surface

Fitting Material

Pipe Material

Number of Bolt Holes

Flange OD

Bolt Circle Diameter

For Use With

Sodium Hydroxide (Caustic Soda)

Shape

For Fitting Schedule

Specifications Met

Flange Type

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

Export Control Classification Number (ECCN)

2A992

2B999

EAR99

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

Yes

RoHS

Compliant

Compliant with Exemptions

REACH

Nut Type

Flange Mount Type

1,242 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.

Pipe and Fittings

Stainless Steel Unthreaded Pipe and Fittings

Low-Pressure Stainless Steel Unthreaded Pipe Flanges

Create an access point in lines up to 230 psi

132 products

High-Pressure Stainless Steel Unthreaded Pipe Flanges

Create an access point in lines up to 1,200 psi; also known as Class 300 or Class 600 flanges

85 products

SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges

Add an access point in hydraulic lines up to 5,000 psi; also known as Code 61 SAE hydraulic flanges

8 products

Iron and Steel Unthreaded Pipe and Fittings

Low-Pressure Iron and Steel Unthreaded Pipe Flanges

Create an access point in lines up to 230 psi

82 products

High-Pressure Iron and Steel Unthreaded Pipe Flanges

Create an access point in lines up to 1,400 psi; also known as Class 300 or Class 600 flanges

53 products

Extreme-Pressure Iron and Steel Unthreaded Pipe Flanges

Create an access point in extreme-pressure lines; also known as Class 1500 flanges

10 products

SAE High-Pressure Iron and Steel Unthreaded Pipe Flanges

Add an access point in hydraulic lines up to 3,000 psi; also known as Code 61 SAE hydraulic flanges

10 products

Plastic Pipe and Fittings

Thick-Wall Plastic Pipe Flanges for Water

Create an access point in high-pressure water supply lines; also known as Class 150 flanges

41 products

CPVC Pipe Flanges for Chemicals

Add an access point to lines that withstand chemicals; also known as Class 150 flanges

33 products

High-Purity Polypropylene Pipe Flanges for Drinking Water

Add an access point to lines that won't leach contaminants; also known as Class 150 flanges

10 products

Spin-Weld Plastic Pipe Fittings for Water

Melt into plastic tanks, walls, and panels for a leak-free connection without gaskets or sealants

14 products

Fiberglass Pipe Flanges for Chemicals

Create an access point in heavy duty chemical-process lines, such as for plating solution

6 products

Aluminum Unthreaded Pipe and Fittings

Low-Pressure Aluminum Unthreaded Pipe Flanges

Create an access point in lines up to 150 psi; also known as Class 125 flanges

22 products

Iron and Steel Threaded Pipe and Fittings

Low-Pressure Iron and Steel Threaded Pipe Fittings

For pressures up to 300 psi

42 products

Stainless Steel Threaded Pipe and Fittings

Low-Pressure Stainless Steel Threaded Pipe Fittings

For pressures up to 500 psi

11 products

Drain, Waste, and Vent Pipe and Fittings

Drain, Waste, and Vent Standard-Wall PVC Pipe Flanges for Water

Create an access point in gravity-flow drain, waste, and vent lines; also known as Schedule 40

5 products

Drain, Waste, and Vent ABS Pipe Flanges for Chemicals

Add an access point in gravity-flow chemical-waste systems

5 products

Aluminum Threaded Pipe and Fittings

Low-Pressure Aluminum Threaded Pipe Fittings

For pressures up to 250 psi

14 products

Brass and Bronze Unthreaded Pipe and Fittings

Low-Pressure Brass and Bronze Unthreaded Pipe Flanges

Create an access point in lines up to 225 psi; also known as Silbraze flanges

10 products

Other Products

Pipe Stub Ends

Connect a pipe flange to a pipe without needing to weld it in place

154 products

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

56 products

Orifice Valves

Restrict the flow of liquids and gases to precisely control rate and pressure

24 products

Weld Nuts

Weld to metal surfaces to add permanent threads

308 products

Duct Flanges

Mount on equipment to start a run of duct, or create a secure joint between two sections

41 products