Steel Pipe Tee

Steel pipe tee has three branches that can change fluid direction. It has T-shaped or Y-shaped, and include Equal Tee and Reducing Tee (Reducer Tee). Steel tee is widely used in pipe networks for convey liquids and gases.

How many types of steel pipe tee?

According to branch diameters and functions there are:
Equal Tee
Reducing Tee (Reducer Tee).

According to connection types are:
Butt Weld Tee
Socket Weld Tee
Threaded Tee.

According to material types there are:
Carbon Steel Pipe Tee
Alloy Steel Tee
Stainless Steel Tee

Steel Equal Tee vs Reducing Tee (Reducer Tee)

Steel Equal Tee

Equal tee: Three branches of tee have same diameters. Also named as Straight Tee.

Steel Equal Tee Description usually as below:
Eg: 6'' Tee ASME B16.9 BW Wrought
Standard ASTM A234 GR. WPB SMLS
Wall thickness Schedule STD

Dimensions and weight for Steel Equal Tee

Steel Reducing Tee (Reducer Tee)

Reducing tee (Reducer Tee): The branch diameter is smaller than main diameter. The reducing tee is usually described as NPS diameters in 4” x 4” x 3”,  where 4” is the main line pipe diameter, and 3” is the reducing branch.

Butt Weld Tee vs Socket Weld Tee vs Threaded Tee

Butt Weld Tee

Butt weld tee is widely used in petroleum, aerospace pharmacy, chemical industry, metallurgy, electric power, military industry, engineering support and other industrial pipelines.

Ends in plain or beveled, connected by butt welding process. It can withstand higher pressure than other types. The size of butt weld tee should be specified in pipe NPS (DN) and thickness in schedule, where the socket weld tee or thread tee thickness should be specified in the pressure level.

Butt weld tee is divided into seamless cold-drawn tee and seam welding tee in the production process.

Butt Weld Steel Equal Tee

Socket Weld Tee

Socket weld tee is a kind of high pressure pipe connection fitting. Like the other fittings, it has a trapezoidal area where the pipe can inserted into the tee branch and weld together. It is commonly used in small diameter systems.

Socket weld tee is described as NPS and Pressure ratings 3000#, 6000# and 9000#, same as threaded tee.

Socket Weld Tee

SW Tee Weight in KG

Threaded Tee

In the manufacturing process, threaded pipe tee has forging and casing process. Forging is formed by heating forging with ingots or round bars, then turning on a lathe to process threads. Casting means that the ingot is melted and poured into the tee model after it is cooled.

Based on socket tee form, the branch end can be threaded to male or female. So there are male tee and female tee, which if the tube with male NPT threads, then the tee shall be with female NPT threads.

Threaded Tee

THD Tee Weight in KG

Carbon Steel Tee

Carbon steel tee material: ASTM A234 WPB, WPC; MSS SP-75 WPHY-42, WPHY-46, WPHY-52, WPHY-56, 60, 65 and 70.
ASME/ANSI B16.9 for butt weld tee fittings,
ASME/ANSI B16.11 for socket weld and threaded tee fittings.

Alloy Steel Tee

Alloy steel material: ASTM A234 WP1, WP5, WP9, WP11, WP22, WP91

Stainless Steel Tee

Stainless steel tee is widely used in chemical, health, food and other industries. Its advantages are applicable to different working environments and have good corrosion resistance.
Standards: ASTM A403 (Common Standard for stainless steel pipe fittings), ASTM A270 (Sanitary Tubing Standard)
Grade: TP 304, 304L, 316, 316L, 310, 317 and 321.


• Oil and gas transmissions
• Petroleum and Oil refining
• Water treatment systems
• Chemical Industries
• Sanitary tubing
• Power stations
• Machines and equipment
• Heat Exchanger

Our Supply Range

For Butt Weld Tee
Standard: ASTM A234, MSS SP-75, ASTM A403
Types: Equal Tee and Reducing Tee (Tee Reducer)
Size Range: 1/2”, 1”, 2”, 3”, 4”, 6”, 8”, 10”, 12”, 16”, 20” to 48”.
Thickness: SCH 10, SCH 40, SCH 80
Surface Coatings: Black Painted, Varnished, Epoxy Coated, Galvanized

For Socket Weld Tee (and Threaded Tee)
Standard: ASTM A105, ASTM A182
Dimensions: 1/2”, 1”, 1/2”, 2” and up to 4”
Pressure Ratings: 2000#, 3000#, 6000#, 9000#

Octal supplies Steel Pipe Tees with competitive price and urgent delivery.

Connection types in butt weld and socket weld.

Related Products

Steel Pipe Elbow

Pipe Reducer

Steel Pipe Cap

Butt Weld Pipe Fittings

Socket Weld Pipe Fittings