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A barred tee is a type of pipe fitting used in piping systems, particularly in industries like oil, gas, and petrochemical. It is a standard tee fitting with an additional feature: it contains bars or a grate across the branch outlet. These bars are designed to:
Prevent Pig Passage: In pipelines where cleaning or inspection tools (known as pipeline pigs) are used, the barred tee ensures that the pig continues along the main pipeline without diverting into the branch line.
Provide Structural Support: The bars can help maintain the integrity of the tee while guiding the flow and preventing debris or tools from entering the branch.
Components
Main Run: The straight section of the tee.
Branch Connection: The perpendicular outlet where the bars are installed.
Bars: Typically welded or integrated into the branch to restrict movement of pigs or tools.
Common Applications
Pigging systems in pipeline networks.
Flow management systems in oil and gas operations.
Situations requiring controlled flow direction and equipment guidance
Design and Specifications:
Dimensions: Barred tees are typically based on standard tee dimensions as per ASME B16.9 or MSS-SP 75. However, the addition of bars is customized to suit specific pipeline requirements. The bars are welded inside the branch outlet to block the passage of pigs.
SUNNY STEEL
Pressure Ratings: They are available in various pressure classes, commonly ranging from ASME Class 150 to 2500 and higher, depending on the application’s requirements.
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Materials: Barred tees are fabricated from materials such as carbon steel (e.g., ASTM A234), stainless steel (e.g., 304, 316), or alloy materials, chosen based on the pipeline’s operating environment and the conveyed fluid’s properties.
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Bar Configuration: The number and thickness of bars vary with the size of the tee and the pigging tool’s design. For instance, a 12-inch run size may have three bars, each 1/2 inch thick, to ensure the pig passes by the branch opening without damage.
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Standards and References:
ASME B16.9: This standard covers factory-made wrought steel butt-welding fittings, including tees, which serve as the basis for barred tee dimensions.
MSS-SP 75: This standard pertains to high-strength, wrought, butt-welding fittings, providing guidelines for manufacturing fittings like tees used in high-pressure pipelines.
Manufacturer Specifications: Manufacturers often provide detailed datasheets outlining the dimensions, materials, pressure ratings, and design specifics of barred tees. For example, Sure Flow Equipment offers barred tees fabricated to customer specifications, adhering to industry standards and pipeline vessel design codes.
Materials
Nickel Alloy: ASTM/ASME S/B366 UNS N08020, N04400, N06600, N06625, N08800, N08810, N08825, N10276,N10665,N10675
Super Stainless Steel: ASTM/ASME S/A182 F44, F904L, F317L
Stainles steel: ASTM/ASME S/A182 F304, F304L, F304H, F316, F316L, F321, F321H, F347H
Duplex Steel: ASTM A182 F51, F53, F55
Alloy Steel: ASTM/ASME S/ A182 F11, F12, F22, F5, F9, F91
Carbon Steel: ASTM/ASME S/A105, ASTM/ASME S/A350 LF2, ASTM/ASME S/A694/A694M, F42, F52, F56, F60, F65, F70….ASTM/ASME S/A350LF2, ASTM/ASME S/A694/A694M, F42, F52, F56, F60, F65, F70….
Dimension
DN15-DN1500
Marking
Supply Logo + Standard + Size(mm) + HEAT NO +or as your requirement
Test
Chemical Component Analysis, Mechanical Properties, Metallurgical Analysis, Impact Testing, Hardness testing , Ferrite Testing,
Intergranular corrosion testing, X-ray Inspection (RT), PMI, PT, UT, HIC & SSC test, etc. or as your requirment
3 years Warranty ANSI B16.9 Seamless Equal and Reduce Tee Carbon steel
