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Quotes - Engineering - Sales| PRODUCT | STYLE | TEMA TYPE | BUNDLE |
| U-Tube Heat Exchanger | U-Tube, single tubesheet | BEU / AEU / BKU | Removable |
ASME BPE U-Tube Heat Exchangers
What the Standard Governs
The Bioprocessing Equipment standard exists because pressure vessel codes say nothing about whether a vessel can be cleaned, drained or documented. BPE fills that gap with requirements that are specific enough to be verified.
Surface designations. BPE replaces a bare Ra number with designations that state both the finish and how it was achieved, distinguishing mechanically polished from electropolished surfaces. Specify the designation rather than a number, because two surfaces at the same Ra can behave differently in service.
Welds. Procedures, welder qualification, examination method and coverage, ferrite control and heat tint limits are all addressed, and weld maps tie each joint back to its record. On tube-to-tubesheet joints this is what turns a seal weld into a documented seal weld.
Dead legs and drainability. Nozzle projections, instrument connections and vents are limited by length-to-diameter ratio, and the assembly must drain in its installed orientation. Slope is specified, not assumed.
Typical Construction
- Standard: ASME BPE, current edition
- Pressure code: ASME Section VIII Division 1, U-stamp
- Wetted material: 316L, dual certified, controlled sulfur for weldability
- Surface finish: BPE SF designation, mechanically polished or electropolished
- Weld examination: Per BPE, with weld map and procedure records
- Dead leg ratio: Within BPE limits at all connections
- Drainability: Sloped in installed orientation, low-point drains
- Tubesheet options: Single or double with vented interspace
- Connections: Sanitary clamp or extended tube weld ends
- Documentation: Turnover package including MTRs, weld records, finish and passivation certification
ASME BPE U-Tube Heat Exchangers
U-TUBE • CONSTRUCTION
WFI & Pure Steam U-Tube
WFI and pure steam U-tube heat exchangers. Double tubesheet construction, 316L electropolished surfaces, and design for hot loop sanitization cycling.
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U-TUBE • CONSTRUCTION
Bioprocess U-Tube
Bioprocess U-tube heat exchangers for media preparation, fermenter temperature control, harvest cooling and buffer duty. Low holdup, gentle velocities
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U-TUBE • CONSTRUCTION
Sanitary U-Tube
Sanitary U-tube heat exchangers in 316L with tri-clamp connections, drainable geometry and removable bundles. Built for 3-A duty and CIP circuits.
+ Learn MoreASME BPE U-Tube Heat Exchangers
Specify the Designation, Not Just a Number
A specification that reads 20 Ra is ambiguous: it does not say whether that finish is mechanically produced or electropolished, and those surfaces do not corrode the same way. BPE surface designations remove the ambiguity by naming both the roughness limit and the method.
This matters most on hot, continuously circulating high-purity water, where the chromium-enriched surface left by electropolishing is doing real corrosion-resistance work rather than just looking clean.
Where BPE and a U-Tube Bundle Interact
Two points come up on every project. The first is the bend interior, which cannot be reliably electropolished or verified; where every product-contact surface must carry an electropolished designation, run the high-purity fluid shell-side. The second is drainability, which on a horizontal U-tube unit depends on shell slope and nozzle placement rather than on the bundle itself.
Both are straightforward to resolve at design stage and awkward to resolve afterward, which is the argument for settling them before fabrication rather than during qualification.
