ASME U Stamp Water to Water Shell and Tube Heat Exchanger for Oil & Gas

Yuhong Group Co., Ltd. designs and manufactures a comprehensive range of heat transfer equipment—shell and tube heat exchangers, pressure vessels, air coolers, and fired heaters—alongside critical components including tube bundles, U-tubes, heat exchanger tubes, finned tubes, tubesheets, baffles, and channel heads. With three ASME-certified facilities spanning 184,000 m² and an annual capacity exceeding 3,600 units, we deliver code-compliant thermal equipment to global oil & gas, petrochemical, and power generation markets.

The ASME U Stamp Water to Water Shell and Tube Heat Exchanger is a pressure vessel engineered for liquid-to-liquid heat transfer service in demanding oil & gas environments. Designed and fabricated in full compliance with ASME Boiler and Pressure Vessel Code Section VIII Division 1, this exchanger carries the ASME "U" Stamp—certifying that the vessel has undergone independent design verification, material traceability, weld procedure qualification (ASME Section IX), and third-party inspection by an Authorized Inspector.

Available in fixed tubesheet (TEMA AEL/BEM) or U-tube (TEMA BEU) configurations, the unit accommodates thermal expansion differentials while maintaining leak-proof tube-to-tubesheet joints (expanded or seal-welded). Shell diameters range from 6" to 120" (customizable), with tube lengths up to 20 m and pressure ratings up to 6,000 psi. Operating temperature range: -50°C to 600°C.

All pressure-retaining components are fabricated from ASME-certified materials with full mill test reports (MTRs) and positive material identification (PMI):

Tube-to-tubesheet joints are executed via hydraulic expansion or seal welding per ASME Section VIII UW-20, with expanded joint depth and pull-out strength verified through qualification testing.

Every U-stamped unit undergoes the following inspection and testing protocol, witnessed by an Authorized Inspector (AI):

All NDT reports, hydrostatic test charts, welding procedure specifications (WPS/PQR), and material test reports are compiled into a comprehensive data report (Form U-1 or U-1A) and registered with the National Board (NB) where required.

This water-to-water shell and tube heat exchanger is deployed across upstream, midstream, and downstream oil & gas operations:

• Upstream: Produced water cooling, glycol dehydration reboilers, crude oil heating before separation
• Midstream: Pipeline compressor intercoolers/aftercoolers, gas processing plant heat recovery
• Downstream (Refining & Petrochemical): Crude preheat trains (CDU/VDU), distillate product coolers, column reboilers and condensers, amine regenerator reboilers, feedwater heaters

The exchanger handles clean to moderately fouling water services on both shell and tube sides, with fouling factors accounted for in thermal design per TEMA standards.

Thermal Design: Heat transfer area and tube count are calculated per TEMA standards using HTRI or equivalent thermal design software, with baffle spacing and cut (typically 25% segmental) optimized for cross-flow velocity and heat transfer coefficient.

Mechanical Integrity: Fixed tubesheet design (TEMA AEL/BEM) provides the simplest, most leak-proof construction for low thermal expansion differential service. U-tube design (TEMA BEU) accommodates high ΔT without expansion joints, eliminating one tubesheet and reducing cost.

Corrosion Allowance: Shell, channel, and tubesheet thicknesses include specified corrosion allowance (typically 1.5-3.0 mm) per client process requirements, ensuring service life under corrosive water chemistries.

• TEMA Type: AEL (fixed tubesheet, removable channel cover), BEM (bonnet front, fixed rear), BEU (U-tube), or floating head (AES/AET)
• Tube pitch: Triangular (for higher heat transfer) or square (for mechanical cleaning)
• Baffle types: Segmental, helical, or double-segmental
• Nozzle orientation, size, and rating per ASME B16.5 (Class 150-2500)
• Clad materials (e.g., stainless steel overlay on carbon steel tubesheet) for corrosive service