Case Overview
A desalination-equipment and power-station condenser supplier was replacing imported copper-nickel tubes with inconsistent walls and no hydrostatic test records. Tubes leaked during bundle assembly, delaying commissioning. The supplier needed qualified seawater-service tubes with documented pressure integrity.
DZX qualified with CuNi10Fe and CuNi30Mn tubes having verified chemistry, tight wall tolerances and hydrostatic test records, eliminating assembly leaks and restoring the commissioning schedule.
This case summarizes the application requirements, materials supplied by DZX and delivery value. For case-specific technical data, please contact our engineering team.
| Item | Details |
|---|---|
| Client Profile | Desalination-equipment and power-station condenser supplier |
| Project Scale | Tube-bundle assembly, recurring projects |
| Application | Desalination evaporators, power-station condensers and cooling systems |
| Materials Supplied | CuNi10Fe and CuNi30Mn tubes and plate |
| Supply Forms | Tube and plate |
| Lead Time | Standard sizes: 2-3 weeks; mill batches: 5-6 weeks |
| Project Country | Saudi Arabia |
| Project Year | 2025 |
Our Solution
The supplier’s assembly line exposed three material failures:
- Bundle leaks: inconsistent imported tube walls leaked during expansion and hydrostatic testing, causing rework and commissioning delays.
- Missing pressure records: tubes arrived without hydrostatic test documentation, creating quality-assurance and acceptance risks for the supplier’s customers.
- Uncertain chemistry: seawater service required verified Cu/Ni composition; incomplete certificates prevented corrosion-life assessment.
DZX organized supply around assembly and acceptance requirements:
CuNi10Fe and CuNi30Mn tubes were supplied to ASTM B111 with verified chemistry and tight wall tolerances for reliable expansion. Hydrostatic test records were provided as agreed. Every batch included chemistry, dimensional and pressure documentation for acceptance files.
| Material | Representative Grades | Key Properties | Available Forms |
|---|---|---|---|
| Copper-nickel alloys | CuNi10Fe | Seawater and general service | Tube and plate |
| Copper-nickel alloys | CuNi30Mn | High-flow and condenser service | Tube and plate |
| Titanium | GR2 | High-performance condenser tubes | Tube |
Condenser and seawater piping
High-flow seawater service
Tube sheets and matching components
Technical Specifications
Key technical parameters agreed before production. Contact us for grade-specific datasheets and tolerance-verification reports.
| Parameter | Agreed Specification | Verification Method |
|---|---|---|
| Tube dimensions (typical) | 25.4 mm OD × 1.2 mm wall | Micrometer + ultrasonic wall-thickness inspection |
| Wall-thickness tolerance | ASTM B111 | Batch sampling |
| Composition | CuNi10Fe / CuNi30Mn, to ASTM B111 | Batch chemical analysis |
| Hydrostatic testing (as agreed) | To classification-society rules/specification | Batch test records |
| Straightness | To assembly requirements | Coil-by-coil straightness inspection |
Each supplied batch includes a quality inspection certificate with chemical analysis, meeting the applicable standard for each grade.
| Material | Applicable Standards |
|---|---|
| Copper-nickel alloys | ASTM B111, B171 |
| Titanium | ASTM B338 |
| Quality System | Mill quality certificate including chemistry and mechanical properties |
Delivery and Quality Support
- Fast delivery: Sample and production lead times follow the project schedule; standard grades and sizes can be dispatched promptly from stock.
- Quality traceability: Every batch includes material certificates and inspection reports, with full heat and batch traceability.
- Technical support: Responsive support covers pre-sale material selection, drawing review and post-sale processing advice.
- Ongoing service: Regular follow-up after delivery tracks performance and addresses feedback promptly.
Customer Feedback
- Assembly leaks eliminated: consistent walls ended tube-bundle leak rework
- Acceptance risk eliminated: agreed hydrostatic records supported customer files
- Seawater service life supported: verified chemistry enabled corrosion-life assessment
- Commissioning on schedule: no material-related delays in tube-bundle assembly
- Auditable batches: chemistry, dimensional and pressure reports for every batch
- One source, three grades: CuNi10Fe, CuNi30Mn and titanium coordinated by one manufacturer
Our Capabilities
Jiangsu DZX Technology Co., Ltd. (Changzhou DLX Alloy) was founded in 2016. Its core team has worked in the field since 2002, with 24 years of precision-alloy R&D and production experience, operating a self-owned 12,000-square-meter modern factory with an ISO9001 system covering three inspection stages. Annual alloy output exceeds 1,200 tonnes, serving 1500+ business customers worldwide. The company operates integrated melting, drawing, annealing and precision-machining workshops, supporting volume customization of strip, wire, tube and bar. Every batch includes a chemical analysis report (MTC) for full delivery-quality traceability.
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