Tube Sheet Flange(TS)
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A Tube Sheet Flange (often referred to simply as a Tubesheet) is a critical, specialized component primarily used in shell-and-tube heat exchangers, boilers, and pressure vessels. It is a thick, circular, forged steel plate integrated with a flange rim, serving the dual purpose of structurally supporting a bundle of tubes and acting as a pressure-containing seal to isolate two different fluids.Core Design & FunctionsTube Support & AlignmentIt is precision-drilled with hundreds or thousands of accurately spaced, sized holes to securely hold heat-exchanger tubes.Tubes are fixed into the holes via welding, roller expansion, or hydraulic expansion to ensure rigidity and prevent leaks.It acts as the main structural "skeleton" for the entire tube bundle, resisting vibration, thermal stress, and internal pressure.Fluid Isolation & SealingThe outer flange face connects and seals to the vessel/shell, creating an impermeable barrier.It strictly separates the tube-side fluid (flowing inside the tubes) from the shell-side fluid (flowing around the tubes in the vessel), preventing cross-contamination.Pressure BoundaryAs part of the pressure vessel, it must withstand high internal pressures (up to Class 2500/PN420) and extreme temperatures.Key FeaturesConstruction: Typically manufactured from a single forged plate for high strength.Precision: Extremely tight tolerances for hole diameter, pitch, perpendicularity, and surface finish.Flange Face: Available with standard flange facings such as Raised Face (RF), Ring Type Joint (RTJ), or Flat Face (FF) for connection.Sizes: Ranges from small diameters to very large sizes (4–5 meters common in power and chemical plants).Standards: Designed and manufactured per ASME Section VIII, ASME B16.5, B16.47, and GB 150/151.Common MaterialsCarbon Steel: A105, A350 LF2, Q345R (for general, non-corrosive service).Stainless Steel: 304/304L, 316/316L (for corrosive environments).High-Alloy & Special Metals: Titanium, Hastelloy, Inconel, Duplex Steel (for highly corrosive, high-temperature, or high-pressure services).Typical ApplicationsShell-and-Tube Heat Exchangers (oil refineries, chemical plants)Boilers & Steam Generators (power stations)Condensers & Evaporators (HVAC, refrigeration, desalination)Pressure Vessels (petrochemical, nuclear industries)AdvantagesDual Functionality: Combines structural support and pressure sealing in one component.Extreme Durability: Handles high pressure, temperature, and thermal cycling.Superior Sealing: Ensures zero leakage between process fluids.Customizable: Fabricated in any size, material, or hole pattern to meet project specifications.
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Main products: WN, SO, PL, BL flanges, elbows, tees, reducers, caps. Materials: carbon steel, stainless steel, alloy steel. Standards: ASME, ANSI, EN, JIS, DIN. Export to global pipeline projects. Contact Us