Iron (Class 300) Medium-Pressure Threaded Pipe Fittings

Search Results

	Pipe Size Pipe Size

1/8

1/4

	Shape Shape


90° Elbow	Straight

Tee	45° Elbow

Cap/Plug	Cross

	Type Type


Connector	Reducer

Union	Adapter

Plug	Cap

Flange

	Connection Style Connection Style

Threaded

Flanged

	For Use With For Use With

	Material Material

Iron

Steel

	Finish Finish

Black Coated

Galvanized

	Maximum Pressure Maximum Pressure

300 psi @ 72° F

740 psi @ 72° F

	Gender Gender

Female

Male

	Maximum Steam Pressure Maximum Steam Pressure

300 psi @ 550° F

230 psi @ 550° F

Not Rated

	Specifications Met Specifications Met

ANSI/ASME

ASTM

	Body Shape Body Shape


Hex	Square

	Length Length

	Drive Style Drive Style


External Square	Hex

	Drive Size Drive Size

3/4"

	Hex Width Hex Width

	Flange OD Flange OD

	Number of Bolt Holes Number of Bolt Holes

	Bolt Circle Diameter Bolt Circle Diameter

	For Bolt Diameter For Bolt Diameter

5/8"

3/4"

7/8"

	Bolt Hole Diameter Bolt Hole Diameter

0.62"

3/4"

0.88"

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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.

Medium-Pressure Iron and Steel Threaded Pipe Fittings

With better strength than our low-pressure iron and steel pipe fittings, these can handle medium-pressure applications. They are for use in noncorrosive environments.

Union connectors separate into three pieces so you can access your line without unthreading pipe connections.

Female x male 90° elbow adapters are also known as street elbows.

Inline tees are also known as branch tees.

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

Straight Connectors

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.3, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/8	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	0000
1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000

Union Straight Connectors

Exploded View

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.39, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/8	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	000000
1/4	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	00000
3/8	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	00000
1/2	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	00000
3/4	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	00000
1	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	00000
1 1/4	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	00000
1 1/2	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	00000
2	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	00000
2 1/2	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	000000
3	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	000000

Straight Reducers

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.3, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

Pipe Size
(A)	(B)	Max. Pressure	Max. Steam Pressure	Material		Each
NPT Female
3/8	1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
1/2	1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1/2	3/8	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	3/8	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	3/8	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2 1/2	1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2 1/2	2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3	1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
3	2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
3	2 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000

90° Elbow Connectors

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.3, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
3/8	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	0000
1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
3	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000

Union 90° Elbow Connectors

Exploded View

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.39, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
3/8	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	000000
1/2	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	00000
3/4	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	00000
1	300 psi @ 72° F	230 psi @ 550° F	Iron	00000000	00000

90° Elbow Adapters

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.3, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Female × NPT Male
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
3/8	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000

90° Elbow Reducers

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.3, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

Pipe Size
(A)	(B)	Max. Pressure	Max. Steam Pressure	Material		Each
NPT Female
3/8	1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
1/2	3/8	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000

45° Elbow Connectors

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.3, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
3/8	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
3	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000

45° Elbow Adapters

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.3, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Female × NPT Male
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000

Tee Connectors

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.3, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
3/8	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
3	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000

Inline Tee Reducers

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.3, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

Pipe Size
(A)	(B)	Max. Pressure	Max. Steam Pressure	Material		Each
NPT Female
3/8	1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
1/2	1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1/2	3/8	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1/2	3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	3/8	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2 1/2	1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000

Cross Connectors

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.3, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000

Caps

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.3, UL Listed, ASTM A197, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/8	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	0000
1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	0000
3/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2 1/2	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000

Plugs with Hex Drive

For Use With: Air, Natural Gas, Oil, Steam, Water
Class: 300
Specifications Met: ANSI/ASME B1.20.1, UL Listed
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Male
Pipe Size	Drive Size	Max. Pressure	Max. Steam Pressure	Material		Each
1 1/4	3/4"	300 psi @ 72° F	300 psi @ 550° F	Steel	00000000	00000
1 1/2	1"	300 psi @ 72° F	300 psi @ 550° F	Steel	00000000	00000
2	1"	300 psi @ 72° F	300 psi @ 550° F	Steel	00000000	00000

Plugs with External Square Drive

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 300
Specifications Met: ANSI/ASME B16.14, ASTM A126, UL Listed, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Male
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure	Material		Each
1/2	Solid	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	Solid	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	0000
1	Solid	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	0000
1 1/4	Solid	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	0000
1 1/2	Solid	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	0000
2	Solid	300 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000

Medium-Pressure Galvanized Iron
and Steel Threaded Pipe Fittings

A galvanized finish gives these fittings fair corrosion resistance. They have the strength to handle medium-pressure applications.

Union connectors separate into three pieces so you can access your line without unthreading pipe connections.

Female x male 90° elbow adapters are also known as street elbows.

Inline tees are also known as branch tees.

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

Straight Connectors

For Use With: Air, Natural Gas, Steam, Water
Class: 300
Specifications Met: ASTM A153, ASTM A197, ANSI/ASME B16.3, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
3/8	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000

Union Straight Connectors

Exploded View

For Use With: Air, Natural Gas, Steam, Water
Class: 300
Specifications Met: FM Approved, UL Listed, ASTM A197, ASTM A153, ANSI/ASME B1.20.1, ANSI/ASME B16.39
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/8	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
3/8	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	000000	00000

Straight Reducers

For Use With: Air, Natural Gas, Steam, Water
Class: 300
Specifications Met: ASTM A153, ASTM A197, ANSI/ASME B16.3, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 steel

Pipe Size
(A)	(B)	Max. Pressure	Max. Steam Pressure	Material		Each
NPT Female
3/8	1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
1/2	1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1/2	3/8	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	000000	00000
3/4	3/8	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
3/4	1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	3/8	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/4	1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	00000000	00000
1 1/4	3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/4	1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/2	1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	00000000	00000
1 1/2	3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	00000000	00000
1 1/2	1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	00000000	00000
1 1/2	1 1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	00000000	00000
2	3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	00000000	000000
2	1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	00000000	00000
2	1 1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	00000000	000000
2	1 1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	00000000	00000

90° Elbow Connectors

For Use With: Air, Natural Gas, Steam, Water
Class: 300
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	000000	000000
3/8	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000

90° Elbow Adapters

For Use With: Air, Natural Gas, Steam, Water
Class: 300
Specifications Met: ASTM A153, ASTM A197, ANSI/ASME B16.3, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 steel

NPT Female × NPT Male
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
3/8	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000

90° Elbow Reducers

For Use With: Air, Natural Gas, Steam, Water
Class: 300
Specifications Met: ASTM A153, ASTM A197, ANSI/ASME B16.3, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 steel

Pipe Size
(A)	(B)	Max. Pressure	Max. Steam Pressure	Material		Each
NPT Female
3/4	1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
1	1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
2	1 1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000

45° Elbow Connectors

Class: 300
Specifications Met: ASTM A153, ASTM A197, ANSI/ASME B16.3, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
3/8	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000

Tee Connectors

For Use With: Air, Natural Gas, Steam, Water
Class: 300
Specifications Met: ASTM A153, ASTM A197, ANSI/ASME B16.3, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
3/8	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000

Inline Tee Reducers

For Use With: Air, Natural Gas, Steam, Water
Class: 300
Specifications Met: ASTM A153, ASTM A197, ANSI/ASME B16.3, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 steel

Pipe Size
(A)	(B)	Max. Pressure	Max. Steam Pressure	Material		Each
NPT Female
3/4	1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
1	1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/4	1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/4	3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/4	1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/2	1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	000000	000000
1 1/2	3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
1 1/2	1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
1 1/2	1 1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
2	1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
2	3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
2	1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
2	1 1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
2	1 1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000

Caps

For Use With: Air, Natural Gas, Steam, Water
Class: 300
Specifications Met: ASTM A153, ASTM A197, ANSI/ASME B16.3, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
3/8	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	000000	00000
1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
3/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/4	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
2	300 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000

Medium-Pressure Galvanized
Steel Threaded Pipe Flanges

Front

Raised Surface on Back

For Use With: Air, Natural Gas, Steam, Water
Class: 300
Specifications Met: ASTM A123, ASTM A105, ANSI/ASME B16.5
Pipe Nipples and Pipe: Use Schedule 80 steel
Fittings: Use Class 300 iron or steel

A galvanized finish gives these flanges fair corrosion resistance. Also known as Class 300 flanges, they can withstand medium-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line.

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

			Bolt Hole
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure		Each
NPT
1/2	3 3/4"	5/8"	0.62"	4	2 5/8"	740 psi @ 72° F	0000000	000000
3/4	4 5/8"	3/4"	3/4"	4	3 1/4"	740 psi @ 72° F	0000000	000000
1	4 7/8"	3/4"	3/4"	4	3 1/2"	740 psi @ 72° F	0000000	00000
1 1/4	5 1/4"	3/4"	3/4"	4	3 7/8"	740 psi @ 72° F	0000000	000000
1 1/2	6 1/8"	7/8"	0.88"	4	4 1/2"	740 psi @ 72° F	0000000	00000
2	6 1/2"	3/4"	3/4"	8	5"	740 psi @ 72° F	0000000	00000
3	8 1/4"	7/8"	0.88"	8	6 5/8"	740 psi @ 72° F	0000000	000000
4	10"	7/8"	0.88"	8	7 7/8"	740 psi @ 72° F	0000000	000000

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How to Identify and Measure Fittings

Medium-Pressure Iron and Steel Threaded Pipe Fittings

Medium-Pressure Galvanized Ironand Steel Threaded Pipe Fittings

Medium-Pressure GalvanizedSteel Threaded Pipe Flanges

Medium-Pressure Iron and Steel Threaded Pipe Fittings

Medium-Pressure Galvanized Ironand Steel Threaded Pipe Fittings

Medium-Pressure GalvanizedSteel Threaded Pipe Flanges

Medium-Pressure Galvanized Iron
and Steel Threaded Pipe Fittings

Medium-Pressure Galvanized
Steel Threaded Pipe Flanges

Medium-Pressure Galvanized Iron
and Steel Threaded Pipe Fittings

Medium-Pressure Galvanized
Steel Threaded Pipe Flanges