YUHONG GROUP has more than 35 years of experience in supplying alloy steel, stainless steel, duplex stainless steel, nickel alloy, titanium, and copper alloy piping products. The supply range includes seamless and welded pipes and tubes, forged flanges, butt weld fittings, forged fittings, heat exchanger tubes, tube bundles, tubesheets, and other drawing-based components. Applicable certifications and approvals held by our group companies and manufacturing facilities include CE, TÜV, LR, ABS, DNV, BV, KR, PED, AD 2000, CCS, TS, CNNC, ISO 9001, ISO 14001, OHSAS 18001, and ISO 45001, subject to the scope and validity of the relevant certificates.
Bundle Layout Pattern: 30‑Degree Triangular Pitch Angle / 32.000 mm Pitch Spacing
Tube Passes / Baffle Type: 4 Passes Tube Side / 35% Diameter Cut Single‑Segmental Baffles (7 Pieces, 400 mm Spacing)
Operating Parameters: Shell Side Inlet 45.00°C to Outlet 35.00°C / Tube Side Inlet 350.00°C to Outlet 190.00°C
Design Boundaries: Shell Side 1200.0 kPa at 150.00°C / Tube Side 1000.0 kPa at 200.00°C
Corrosion Allowance: Shell Side 1.000 mm / Tube Side 1.000 mm
Finished Components Weight: Dry Weight 2032 kg / Operating Weight 3057 kg / Removable Finned Tube Bundle Weight 1126 kg
Process Connections: Shell Side Inlet/Outlet 100.00 mm (PN16 RFSO Flanged) / Tube Side Inlet/Outlet 80.000 mm (PN16 RFSO Flanged)
Internal Gasket Standard: PTFE or Spiral Wound Gaskets with Graphite Filler
All pressure‑retaining parts, internal elements, and bounding structures of this TEMA heat exchanger finned tube bundle utilize explicitly documented ASME Section II material standards:
Tubes Layout: 218 pieces of ASME SA‑213 TP316L (SS316L) bright annealed seamless exchange tubes measuring 25 mm OD * 2 mm wall thickness * 3000 mm length arranged in a 30‑degree layout.
Tubesheets: Stationary and floating structural plates configured for a TEMA BES floating head assembly utilizing torque‑controlled expanded and strength‑welded tube‑to‑tubesheet joints.
Baffle & Support Plates: 7 cross‑flow pieces of single‑segmental carbon steel plates cut at a 35% diameter ratio and spaced at tight 400 mm central intervals.
Shell Cylinder Sections: Heavy‑walled carbon steel plate meeting ASME SA‑516 Grade 70 / Q345R parameters providing a 1.000 mm corrosion allowance.
Frame Internals: 6 carbon steel tie rods combined with 3 passlane seal rods and 1 pair of sealing strips positioned along the bundle perimeter to prevent fluid bypass.
Process Connection Flanges: Carbon steel RFSO flanged connections rated to PN16 standards for direct integration with external piping networks.
High‑Temperature Thermal Expansion Accommodation: The TEMA BES horizontal multipass configuration isolates the finned tube bundle from the external shell structure, absorbing axial elongation down to the 350°C process inlet boundary.
Automated Expanded & Strength‑Welded Joints: Automated orbital equipment executes structural strength welding of the SA‑213 TP316L stainless steel tubes to the tubesheet, followed by secondary electronic torque expansion.
Integrated Fluid Bypass Control: Retaining 1 pair of mechanical sealing strips and 3 passlane seal rods restricts parallel shell‑side water streams to a 0.055 crossflow window fraction.
Precision Segmented Baffle Layout: CNC milling machines establish a 400 mm horizontal pitch spacing for the 7 single‑segmental baffles, matching the shell interior clearance to 4.7625 mm.
Multi‑Circuit Hydrostatic Holding Tests: Completely assembled TEMA heat exchanger bundles undergo separate pressure retention tests at the manufacturing facility matching the 1200 kPaG shell and 1000 kPaG tube limits.
Volumetric and Surface Weld NDT: All pressure‑boundary longitudinal and circumferential welding paths undergo 100% volumetric Radiographic Testing (RT) supplemented by Liquid Penetrant Testing (PT) on stainless‑to‑carbon steel transition joints.
Joint Integrity Helium Leak Audits: The complete matrix of 218 tube‑to‑tubesheet expanded joints undergoes helium mass spectrometer leak detection testing to isolate micro‑porosity before final frame insertion.
Third‑Party Regulatory Audits: Every phase of mechanical fabrication, material tracking to original mill certificates, and final dimensional geometry verification allows direct oversight by independent inspection agencies including Bureau Veritas (BV), SGS, or TÜV.
Beyond ASME U‑Stamp and TEMA, YUHONG GROUP can supply equipment with additional certifications including ASME S Stamp, ASME PP Stamp, National Board (NB) Registered, PED 2014/68/EU, API 660, EAC, GOST R, ABS, LR, DNV, GL, BV, KR, TS, CCS, ISO 9001, ISO 14001, OHSAS 18001, and ISO 45001.
ASME U‑Stamp shell and tube heat exchangers with finned tube bundles are used across oil and gas refineries, petrochemical plants, power generation facilities, chemical processing units, and marine systems for condensation, cooling, heating, and heat recovery duties.
All products are supplied with full traceability and complete inspection documentation. Third‑party inspection (e.g., TÜV, DNV, LR, ABS, BV) is available upon request.
