Stainless Steel Spiral Wound Heat Exchanger Tube Bundle with Compact High-Pressure Design for Cryogenic Service - ASME SA213 TP304/316L
Yuhong Group Co., Ltd. engineers and supplies complete shell & tube heat exchangers, pressure vessels, air coolers, as well as high-performance tube bundles for retrofit and new projects. Our portfolio includes U-tubes, finned tubes, heat exchanger tubes (stainless steel, nickel alloy, copper alloy), heat exchanger tubesheets, baffles, heads, and advanced spiral wound tube bundles - a compact, high-efficiency alternative for demanding thermal duties.
The stainless steel spiral wound tube bundle is engineered for applications where space is limited but thermal performance cannot be compromised. Unlike conventional straight-tube bundles, this design consists of multiple layers of continuous spiral-wound seamless tubes (ASME SA213 TP304/304L or TP316/316L) wrapped around a central core. Each layer is separated by precision-spaced rods, creating multiple parallel flow paths on the shell side while the tube side fluid travels a long helical path. The result is extremely high heat transfer area per unit volume, true counter-current flow, and the ability to handle large temperature crosses with approach temperatures as low as 1-2°C.
| Component | Typical Material | Role in the Heat Exchanger |
|---|---|---|
| Spiral wound heat exchanger tube | Stainless steel seamless (304/316L) | Carries the tube-side fluid; long helical path induces turbulence and enhances heat transfer |
| Central core tube | Stainless steel seamless | Supports inner winding layers; may distribute fluid to the bundle |
| Layer spacer bars | Stainless steel rod/bar | Maintain precise gap between tube layers; creates shell-side flow channels |
| End tubesheets | Forged stainless steel (SA182 F304/316L) | Anchors all tube ends; drilled in a spiral pattern matching the winding layers |
| Winding bandage / straps | Stainless steel | Secures the wound bundle during insertion and operation |
| Optional fin tube on outer layers | Stainless steel base + aluminum/SS fin | Increases surface area when cooling low-pressure gas; boosts overall capacity |
| Impingement shield (inlet nozzle area) | Stainless steel | Protects outer tube layers from high-velocity inlet erosion |
- Up to 5 times more heat transfer area in the same shell diameter - ideal for retrofitting more duty into existing shells
- Handles very high tube-side pressure (e.g., 200 bar natural gas) because small-diameter tubes are inherently strong
- Achieves close temperature approaches - essential for cryogenic liquefaction (LNG, nitrogen, ethylene)
- Reduces plot space and piping - a single spiral wound exchanger can replace multiple straight-tube units
- Controlled winding tension: Prevents tube flattening or wall thinning; ensures consistent layer spacing
- Layer-by-layer leak testing: Each tube layer is pressure-tested before the next layer is wound - full bundle is finally helium-leak tested
- Precision-machined tubesheet: Spiral hole pattern matches the tube exit positions exactly - no stress on tube ends
- Thermal stress relief: The spiral design naturally accommodates differential expansion between tube layers
| Operating Requirement | Straight Tube Bundle | Spiral Wound Bundle |
|---|---|---|
| Large duty in limited space | Not feasible - requires longer shell or larger diameter | Excellent - high area density |
| Tube side pressure >100 bar | Requires very thick tubesheet and shell | Still compact - small tube diameter handles high pressure |
| Temperature approach <5°C | Difficult - cross-flow leads to temperature pinch | Achievable - near true counter-flow |
| Shell side fouling prone | Better - can be mechanically cleaned | Limited - chemical cleaning only |
| Ease of inspection | Removable bundle allows visual inspection | Non-removable from shell - NDT methods used |
- Liquefied natural gas (LNG) plants - main cryogenic heat exchanger (MCHE) bundles
- Air separation units (ASU) - nitrogen/oxygen liquefiers and reboilers
- Petrochemical cold boxes - ethylene, propylene, and methane heat exchange
- Hydrogen cooling and liquefaction - high-pressure, low-temperature service
- Chemical plants - feed/effluent heat exchange for high-pressure synthesis (methanol, ammonia)
Even if you don't need a full bundle, we provide individual components to repair or upgrade your existing spiral wound exchanger:
- Heat exchanger tubes (stainless steel seamless) - cut to length, annealed, and cleaned for winding
- Spacer bars and layer strips - precision-cut to your original gap dimensions
- Heat exchanger tubesheet (forged stainless steel) - custom-drilled with spiral hole pattern
- Fin tube - stainless steel base with extruded fins for outer layer upgrades
- Exactly matches original bundle geometry - we work from your drawing or field dimensions
- Same or upgraded tube material - choose TP304L, TP316L, or duplex for higher corrosion resistance
- Faster delivery than buying a complete new exchanger
- Full documentation - material certificates, winding records, hydrotest and leak test reports
- Oil & gas - offshore gas processing, LNG export terminals
- Petrochemical - ethylene crackers, methanol plants
- Power generation - hydrogen cooling for generators
- Industrial gases - air separation, nitrogen rejection units
Send your bundle drawing, shell internal dimensions, or service conditions to jimmy@steelseamlesspipe.com. Our engineers will:
- Verify compatibility with your existing shell
- Propose tube material, layer count, and winding pitch
- Provide a detailed price and delivery schedule - typically 12-14 weeks for custom spiral wound bundles
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.