Case Overview
A data-center liquid-cooling integrator building CDUs (coolant distribution units) and immersion-cooling tanks was losing yield through leak-test failures after coil bending. Tube-wall variation from the previous supplier created thin spots that cracked during forming. Rack-level cooling is critical: one leaking coil can shut down an entire cooling loop.
DZX qualified with coil and header tubing offering tight wall tolerances, clean internal surfaces and leak-test support, improving coil assembly yield and restoring the integrator’s delivery 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 | Data-center liquid-cooling integrator (CDUs and immersion-cooling tanks) |
| Project Scale | Rack-level cooling systems, ongoing volume production |
| Application | Cooling coils, headers and CDU heat exchangers |
| Materials Supplied | CuNi alloys, 316L stainless steel and copper |
| Supply Forms | Tube, coils and strip |
| Lead Time | Standard sizes: 2-3 weeks; coils: 4 weeks |
| Project Country | United States |
| Project Year | 2025 |
Our Solution
The integrator’s coil assembly line faced three material-related problems:
- Bending cracks: wall-thickness variation created thin spots that cracked during coil bending, causing assembly-stage leak-test failures.
- Internal cleanliness: residue inside tubes contaminated the cooling loop, threatening long-term liquid-cooling reliability.
- Header integrity: header tubing needed consistent diameters to prevent leak paths in brazed and welded joints.
DZX aligned tube supply with the integrator’s leak-testing process:
Coils were supplied with tight wall tolerances and clean, residue-free internal surfaces for reliable bending and leak-free assembly. Consistent header diameters supported brazed and welded joints; copper strip covered cold-plate and vapor-chamber requirements. Each batch included dimensions, wall-thickness and cleanliness documentation supporting the integrator’s leak-test records.
| Material | Representative Grades | Key Properties | Available Forms |
|---|---|---|---|
| CuNi alloys | CuNi10, CuNi30 | Corrosion resistance and cooling-coil service | Coils and tube |
| Stainless steel | 316L | Headers and CDU piping | Tube and strip |
| Copper and Copper Alloys | C1100, C12200 | Cold plates and vapor chambers | Strip and tube |
View CuNi Alloys → | View Stainless Steel Alloys → | View Copper and Copper Alloys →
Liquid-cooling plates and heat-exchanger tubes
Piping and fittings
Copper tubes and heat-conducting components
Technical Specifications
Key technical parameters agreed before production. Contact us for grade-specific datasheets and tolerance-verification reports.
| Parameter | Agreed Specification | Verification Method |
|---|---|---|
| Coil dimensions | To drawing (e.g. 9.52 mm × 0.7 mm) | Micrometer + wall-thickness measurement |
| Wall-thickness tolerance | Tight tolerances suitable for bending | Batch ultrasonic sampling |
| Internal surface cleanliness | Residue-free and dry | Batch cleanliness testing |
| Header tube OD consistency | ±0.05 mm | OD gauging for every coil |
| Leak-test support | Assembly-record documentation | Material + process records |
Each supplied batch includes a quality inspection certificate with chemical analysis, meeting the applicable standard for each grade.
| Material | Applicable Standards |
|---|---|
| CuNi alloys | ASTM B111, B466 |
| Stainless steel | ASTM A269, A312 |
| Copper | ASTM B75, B152 |
| Quality System | Quality inspection certificate including chemistry and dimensional reports |
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
- Coil yield recovered: tight wall tolerances eliminated bending cracks and assembly-stage leaks
- Clean cooling loops: residue-free internal surfaces protected loop reliability
- Leak-free joints: consistent header diameters supported brazed and welded connections
- Schedule restored: no material-related delays in coil assembly
- Auditable batches: dimensions, wall-thickness and cleanliness reports for each batch
- One-stop cooling package: CuNi, stainless steel and copper 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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