ASME U‑Tube Shell & Tube Heat Exchanger TEMA BEU Class R for Petrochemical Process Duty
YUHONG produce the heavy‑duty U‑tube bundle shell‑and‑tube heat exchangers engineered expressly for continuous, high‑severity process service in refinery and petrochemical environments. Every pressure‑boundary component — shell, channel, tubesheets, nozzles, and reinforcing pads — is mechanically designed, fabricated, inspected, and stamped in full compliance with the ASME Boiler & Pressure Vessel Code, Section VIII, Division 1 (ASME VIII‑1), integrated with TEMA Class R mechanical standards and API 660 where refinery‑specific requirements apply.
Design Code & Governing Standards
Primary Design Code | ASME BPVC Section VIII, Division 1 |
Mechanical / Geometry Standard | TEMA — Class R |
Industry Practice Supplement | API 660 / API 661 |
Welding Qualification | ASME Section IX |
Flange / Nozzle Dimensioning | ASME B16.5 (flanges), ASME B16.47 (large‑diam.), ASME B31.3 (piping interface loads considered in nozzle reinforcement per UG‑37) |
Stamp | ASME "U" Stamp |
Welding & NDT Regime (ASME VIII‑1 / Section IX)
Weld Category | Typical NDT Requirement |
|---|---|
Long. & circ. shell seams (pressure) | RT per UW‑51 (typically 100 % for Class R), or UT where approved |
Nozzle‑to‑shell / insert welds | MT or PT (surface crack detection) per UW‑50 / project spec |
Tube‑to‑tubesheet seal welds | PT or MT 100 % |
Core Pressure‑Boundary Construction
