Shell and Tube Heat Exchanger with SS31803 Tubes & SA-106 Grade B Shell ASME Section VIII
- Durability: SS31803 tubes resist chloride stress corrosion cracking (SCC) in harsh environments.
- Traceability: Full MTCs (Mill Test Certificates) for all materials.
- Global Compliance: Meets ASME, PED 2014/68/EU, and EN 13445 standards.
SS31803 Tubes & SA-106 Grade B Shell Material Construction
- Shell: ASME SA106 Grade B carbon steel (high-temperature/pressure resistance).
- Tubes: ASTM SA789 UNS S31803 duplex stainless steel (superior chloride corrosion resistance, ideal for marine/chemical applications).
- Critical Components:
- Tubesheet: SA266-4N + SS31803 clad (anti-corrosion dual-layer design).
- Baffles/Support Plates: SA516-70 carbon steel (high structural integrity).
- Flanges & Fasteners: SA193-B7/SA194-2H stud bolts & nuts (ASME-compliant high-strength threading).
ASME Section VIII Division 1 Compliance
- Full traceability of materials and fabrication processes.
- Pressure-tested to 1.5× design pressure with hydrostatic/pneumatic methods.
Customizable Design
- Optional Configurations: Fixed tube sheet, U-tube, or floating head designs.
- Accessories: SA240-304 nameplates, SA516-70N lifting lugs, and SA36 grounding bosses (electrochemical safety).
Performance Specifications
- Max Design Pressure: 1500 psi (shell side), 1200 psi (tube side).
- Temperature Range: -20°C to 350°C.
- Surface Finish: 3.2μm Ra for optimal heat transfer efficiency.
Technical Specifications Table
| Component | Material Standard | Key Properties |
| Shell | ASME SA106-B | High tensile strength, weldability |
| Tubes | ASTM SA789-SS31803 | Pitting resistance (PREN ≥35) |
| Tubesheet | SA266-4N + SS31803 clad | Clad layer minimizes galvanic corrosion |
| Gaskets | Flexible graphite | Fire-safe, chemical-resistant sealing |
| Baffles | SA516-70 | Vortex suppression, flow optimization |
| Flanges | SA105N (shell/channel) | RF or RTJ faces per ASME B16.5 |
