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Steel Pipe Tee Fitting

Steel Pipe Tees are generally used to combine or split a fluid flow. A Steel Pipe Tee is a pipe fitting that is shaped like a “T” and has two outlets at 90 degree to the single inlet connection. It is available in socket weld tee, butt weld tee, and screwed tee. We can also fabricate other forms according to the demands of the customers.

1. Steel Pipe Tee Standards

Tee Fittings are normally produced by forging or welding. Steel pipe Tee standards are normally designed based on ASME/ANSI B16.9 or ASME/ANSI B16.11.

ASME B16.9: Factory-Made Wrought Steel Buttwelding Fittings

ASME B16.11-Forged Fittings, Socket-Welding, and Threaded

ASME Steel pipe tee fittings manufacturer

2. Equal Tee & Reducing Tees

The shapes of Steel Pipe Tee, there are two types:

Equal tee has inlets and outlets of the same size. Also called Straight Tee.
Steel Equal Tee Description is usually as below:
4” Tee BW ASME B16.9 ASTM A234 GR. WPB SMLS Schedule STD

Reducing Tees have inlets and outlets of differing sizes, the smaller ones typically being at 90 degrees to the two larger ones.
Steel Reducing Tee is usually described as :
NPS diameters in 4”x 4” x 3” Tee BW ASME B16.9 ASTM A234 GR. WPB SMLS Schedule 80

equal tee and reducing tee

3. Butt Weld Tee & Socket Weld Tee & Threaded Tee

According to the end connections, Steel Pipe Tees are classified as:
Butt Weld Tee
Socket Weld Tee
Threaded Tee

Steel-Pipe-Tee standard types

3.1 Butt Weld Tee

Buttweld tee is divided into seamless cold-drawn tee and seam welding tee in the production process. The dimensional standard for the butt welding pipe tees is ASME/ANSI B16.9, these are available from 1/2″ through 48″, including equal tee and reducing tee.

It is widely used in the petroleum, Oil & gas industry, Chemical industry, Marine industry, Pipeline engineering, and Power industry.

Estan pipe fittings Equal Tee ASME B16.9 A234 WPB.500x500 image
buttweld ASME Tee Dimensions

Standard: ASME B 16.9, ASME B36.19
Size Range: 3/4” to 48” / DN20 to DN1200
Thickness: Sch 10s, 20, STD, 40, 80, 100, 120, 140, 160, XXS
Form: Seamless or Welded
Surface: Pickling and Solution Heat Treatment.

Socket weld tee has a trapezoidal area where the pipe can insert into the tee branch and welded together. It is commonly used in small diameter systems.

Socket weld tee is a kind of high-pressure pipe connection fitting. The pressure rating is 3000lb, 6000lb, and 9000lb. It is usually used for 4 inches or below.

socket weld tee ASME dimensions

Size: 1/8”, 1/4”, 3/8”, 1/2”, 3/4”, 1”, 1 1/4”, 1 1/2”, 2”, 2 1/2”, 3”, 4”
Standard: ASME B16.11 & BS3799
Pressure Rating: Class 3000, 6000, 9000
Surface: Anti-rust Oil or Galvanized.

In the manufacturing process, threaded tee has forging process. Forging is formed by heating forging with ingots or round bars, then turning on a lathe to process threads.

The threaded tees are in same standard ASME B16.11. The thread type is usually NPT, PT, FNPT, BSPP and BSPT.

Threaded Tee Dimensions

Standard: ASME/ANSI B16.11, BS3799
Size: 1/8″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″, 3″, 4″
Pressure Ratings: Class 2000, 3000, 6000
Thread Type: PF, PT, NPT, BSPP, BSPT
Surface: Anti-rust Oil or Galvanized.

4. Steel Pipe Tee Materials

According to material types, there are:
Carbon Steel Pipe Tee
Alloy Steel Pipe Tee
Stainless Steel Pipe Tee
Duplex Steel Pipe Tee
Copper Nickel Pipe Tee

4.1 Carbon steel tee material

ASTM A105, A694 F52, F60, F65, F70, ASTM A350 LF2, LF3
ASTM A234 WPB, A860 WPHY42, 52, 60, 65, 70 A420 WPL3,WPL6, WPL9

4.2 Alloy steel tee material

ASTM A234 WP1, WP5, WP9, WP11, WP12, WP22, WP91
ASTM A182 F1, F5, F9, F11, F12, F22, F91


4.3 Stainless Steel tee material

ASTM A403 WP304/304L/304H, WP316/316L, WP310, WP317, WP321, WP309
ASTM A182 F304/304L/304H, F316/316L, F310, F317, F321, F309

4.4 Duplex Steel tee material

ASTM A182 F51, F53, F55, S 31803, S 32205, S 32550, S 32750, S 32760

4.5 Copper Nickel tee material

ASTM B151 UNS C70600 / C70610 / C70620
ASTM B151 UNS C70600 / C70610 / C70620

5. Common used Steel Pipe Tee

Carbon Steel Buttweld Tee
Stainless Steel Buttweld Tee
Forged Stainless steel Tee
Forged Carbon Steel Tee
Socket Weld Tee 3000# Stainless Steel
Threaded Tee 3000# Stainless Steel
Stainless Steel Schedule 10/40/80 Weld tee

6. Steel Pipe Tee Supply Range

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

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

steel pipe tee materials carbon steel
stainless-steel pipe-fittings-tee_manufacturer_Estan pipe fittings co., ltd
socket weld tee manufacturer-steel pipe tee
threaded pipe tee_steel pipe tee manufacturer