Products · Pressure vessels
Custom Pressure Vessels & Heat Exchangers
Custom-engineered vessels of any size, pressure rating, and material — designed and fabricated to ASME Section VIII Division 1 (Division 2 by project requirement) and international standards. Nameplate data, MAWP, MDMT, and corrosion allowance defined per vessel.
Zenox manufactures custom-engineered pressure vessels to the exact specifications and pressure your operation requires — any size, any material, any duty. The scope covers process vessels, reactors, separators, receivers, columns, and specialty vessels, and extends to heat exchangers and condensers within the same fabrication discipline. This vessel expertise is not a sideline: it is the foundation of the multi-tower adsorber systems inside our own nitrogen and oxygen generators, refined over years of building high-quality pressure equipment to ASME and international standards. Each vessel is engineered for pressure, temperature, and corrosion requirements, fabricated under controlled procedures, and released with inspection and test documentation suitable for plant QA and third-party review.
Pressure vessel shop fabrication — Zenox Australia / Oxair manufacturing assets
Design envelope
Confirm project-specific limits during RFQ.
| Parameter | Capability / approach |
|---|---|
| Design code | ASME Section VIII Div. 1 (Div. 2 on request); international standards per project |
| Vessel types | Process vessels, reactors, separators, receivers, columns, heat exchangers, condensers, adsorber towers |
| Design pressure | Full vacuum to project-defined high pressure (shop history includes high-pressure class vessels) |
| Design temperature | Per material and project MDMT/max design temp |
| Geometry | Horizontal and vertical; custom diameter and T/T length — sized to the operation, not a catalog |
| Materials | Any specified material: CS (e.g. SA-516 Gr.70), SS 304/304L/316/316L, duplex, nickel alloys |
| Corrosion allowance | Per project (typical 1.5–3.0 mm or client specification) |
| Supports | Skirt, saddle, leg, lug, ring support |
| Internals | Demisters, baffles, packing supports, distributors as specified |
| Coatings / linings | Primer/finish systems, specified linings |
| Third-party inspection | Client, AI, or nominated TPI per contract |
Configurations
- Horizontal and vertical process vessels
- Heat exchangers and condensers
- Air and process receivers
- Knock-out drums and separators
- Surge and buffer vessels
- Multi-tower adsorber vessels for PSA/VPSA gas generation systems
- Full-vacuum rated vessels
- Custom nozzle schedules and manway arrangements
Engineering & design
- Mechanical design basis: design P/T, MAWP, MDMT, external pressure, wind/seismic when site data provided
- Nozzle loads and reinforcement per drawing and code
- GA drawings and calculation package under revision control
- Empty / operating / hydrotest weights
- Design software used as applicable to geometry and client requirements
Inspection & testing
Activities aligned to drawing notes, code, and client ITP.
| Activity | Notes |
|---|---|
| Material receiving | MTRs verified against purchase order |
| In-process checks | Fit-up, ovality, alignment, dimensional holds |
| NDE | RT / UT / PT / MT per drawing and code class |
| Hydrostatic test | Per ASME / client ITP |
| Pneumatic test | Only if specified and risk-reviewed |
| Nameplate verification | Code stamp data check |
| Final inspection | Punch list clearance before ship |
Documentation deliverables
- [ ]ASME data report / partial data report (as applicable)
- [ ]As-built drawings (GA, nozzle schedule, nameplate)
- [ ]Material test reports (MTRs)
- [ ]WPS/PQR references
- [ ]NDE reports and radiograph log (as applicable)
- [ ]Hydrotest certificate and chart
- [ ]Dimensional inspection report
- [ ]Coating report
- [ ]Packing list and shipping documents
- [ ]Certificate of conformity / quality release
Typical applications
Related
Submit design conditions for a quote
Include flow, purity, pressure, materials, code, quantity, and drawings when available.