A Butt Weld tee is a type of butt weld fitting used in piping systems. It is designed to allow a 90-degree branch off from a running pipe, enabling the connection of auxiliary equipment or branching to smaller pipes.
The term "butt weld" refers to the method of welding two pieces of metal together end-to-end, which is a common and versatile type of joint welding.
In the context of a Butt Weld tee, the fitting itself is welded to the main pipe, creating a secure and durable connection. This type of fitting is essential for creating complex piping systems where multiple branches or connections are required.
Equal Tee: All three openings are the same size.
Reducing Tee: The branch connection is smaller in size than the main pipe.
Design: It has three openings—one inlet and two outlets (or vice versa)—positioned at a 90-degree angle to each other.
Connection Method: The ends of the tee are beveled to allow for butt welding, a process where the ends of the pipes and the tee are aligned and welded together.
Materials: Butt weld tees are made from materials compatible with the pipes, such as carbon steel, stainless steel, alloy steel, or other metals.
Sizes: They are available in various sizes and schedules (wall thicknesses) to match the piping system.
ASME B16.9:
Description: This standard specifies the dimensions, tolerances, and manufacturing requirements for factory-made wrought steel butt welding fittings, including tees. It covers a wide range of sizes and schedules.
MSS SP-43:
Description: This standard is used for forged steel fittings, including tees. It provides specifications for dimensions, tolerances, and material requirements.
API 590-605:
Description: This standard is used for pipeline fittings, including tees, and provides guidelines for their design, manufacturing, and testing.
EN10253-2:
Description: This European standard specifies the requirements for steel fittings for pipelines, including tees, and covers material properties, dimensions, and testing
Carbon Steel pipe tees:
Standard: ASTM A234
Common Grades: WPB, WPHY 42, WPHY 46, WPHY 52, WPHY 60, WPHY 65, WPHY 70.
Stainless Steel pipe tees:
Standard: ASTM A403
Common Grades: WP304, WP304L, WP316, WP316L, WP321, WP347, WP904L.
Alloy Steel pipe tees:
Standard: ASTM A234
Common Grades: WP1, WP5, WP9, WP11, WP12, WP22, WP91.
Duplex and Super Duplex Steel:
Standard: ASTM A815
Common Grades: UNS S31803, S32205, S32750, S32760.
Nickel Alloys pipe tees:
Standard: ASTM B366
Common Grades: NICKEL 200, MONEL 400, INCONEL 600, INCONEL 625, HASTELLOY C276.
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