When reliability in high-pressure and corrosive environments matters, Custom Aluminum Cast Coupling Flanges deliver unmatched performance. Designed for oil & gas, renewable energy, and industrial systems, these flanges combine A356-T6 aluminum’s strength with precision casting and CNC machining. Trusted by global projects from offshore pipelines to geothermal plants, our solutions meet API 6A, ASME B16.5, and NACE standards while cutting downtime risks.

Built for Extreme Conditions
Industry-Specific Engineering

Every flange meets ASTM B26/B108 casting standards and includes full material traceability (mill test reports).
Full Customization Options
Seamless Ordering Process
1. Share Specifications: Upload CAD files or sketches.
2. Prototype Approval: Get 3D models within 72 hours.
3. Batch Production: MOQ 50 units, with 4-6 week lead times.
| Parameter | Details |
|---|---|
| Material | A356-T6 (AlSi7Mg) |
| Pressure Rating | Up to 2500# (ANSI) |
| Temperature Range | -50°C to 300°C (-58°F to 572°F) |
| Surface Finish | Shot blasting, anodizing optional |
| Certifications | API 6A, ASME B16.5, ISO 9001:2015 |
Case Study: Reduced corrosion-related failures by 40% in a Middle Eastern LNG pipeline project with 1,200 API 6A flanges. Client feedback: “Their technical team optimized our flange design for saltwater exposure, cutting maintenance costs by 22%.”

Q: Can you match legacy flange designs?
A: Yes – submit drawings or samples for reverse engineering.
Q: How do your flanges handle sour gas (H2S) environments?
A: We apply NACE MR0175-compliant coatings and alloys.
Q: What’s the lead time for 500 units?
A: 30 days with expedited production.
Q: Do you provide installation guidelines?
A: Detailed welding/assembly manuals included with every order for Custom Aluminum Cast Coupling Flange.
📧 Contact Steve Zhou at steve.zhou@263.net for a free DFM analysis.
Rongbao Casting – Your Partner in High-Performance Aluminum Cast Coupling Flanges Since 2008
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