butt weld Tee
What is Tee
The ASME/ANSI B16.9 tee is T-shaped with two outlets,the two outlets are 90 degree direction change to the main line.ASME/ANSI B16.9 tee also looks like a short piece of pipe with a outlet(which is called branch).A pipe tee is also called triplet,three way and “T” pieces and it can be used to either combine or split a fluid flow. Most common are tees with the same inlet and outlet sizes, but ‘reducing’ tees are available as well.It is widely used as pipe fittings to connect pipelines with a pipe at a right angle,and is extensively used in pipeline networks to transport two-phase fluid mixtures.
Common type of Tees
Equal tee (or straight tee), means the branch diameter of this tee is same with the main pipe (Run pipe) diameter of this tee.
Reducing tee has a branch that is smaller than main run allows for branching off to a smaller pipe of equipment from main run.
Lateral pipe tee means a pipe fitting which is similar to a tee but has a side opening outlet branch at a 45 degree angle.
barred tee is a tee or any fitting with a branch used in pipelines that is pigged and has a restriction bar welded internally preventing the pig from traveling down a branch connection.
|Type||Butt weld (BW)|
|Standards||ASME / ANSI – B 16.9 ‘Factory-Made Wrought Buttwelding Fittings’ASTM A234 - Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service.
ASTM A403 – ASME SA403 – ‘Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings’
ASME B16.25 – ‘Buttwelding Ends’
ASME B16.28 – ‘Wrought Steel Buttwelding Short Radius Elbows and Returns’
MSS SP-43 – ‘Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications’
|Dimension||ANSI B16.9, ANSI B16.28, MSS-SP-43 Type A, MSS-SP-43 Type B, JIS B2312, JIS B2313|
|Thickness||Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and etc.|
|Size||1/2” TO 96”, (Seamless up to 32”),|
Materials and Grade
Carbon Steel :
ASTM A234 Gr. WPB
ASTM A420 Gr. WPL6/WPL3
EN10253-2 P235GH P265GH 16Mo3
DIN 1.4301, DIN1.4306, DIN 1.4401, DIN 1.4404
Alloy steel :
ASTM A234 wp5 / wp9 / wp11 / wp22 / wp91
ASTM A860 WPHY42/WPHY52/WPHY60/WPHY65/WPHY70
MSS SP-75 WPHY42/WPHY52/WPHY60/WPHY65/WPHY70
ASTM A403 WP316/316L
ASTM A403 WP304/304L
TEES: Extrusion method (Hot Forming)
The hot-extrusion process consists of enclosing a piece of metal, heated to forging temperature, in a chamber called a “container” having a die at one end with an opening of the shape of the desired finished section, and applying pressure to the metal through the opposite end of the container. The metal is forced through the opening, the shape of which it assumes in cross-section, as the metal flows plastically under the great pressures used.