Precision Seal Welding Services
Full-Penetration Seal Welding – with Helium Leak Detection Down to 1×10⁻¹⁰ mbar•L/s
Zero-defect seal welding on critical equipment. Helium leak detection ensures every joint passes. Serving aerospace, semiconductor, cryogenic & vacuum industries.
Master the Seal. Pass Every Leak Test
When your components must hold vacuum, contain pressure, or survive extreme conditions, seal welding isn’t just a process—it’s a guarantee. We deliver full-penetration, porosity-free seal welds on vacuum vessels, cryogenic vessels, aerospace componentset semiconductor manufacturing equipment.
Every weld we produce is built to pass helium leak detection with zero rejects.
Zero-Leak Guarantee
We don't just weld—we verify. Every seam is designed to meet or exceed leak-tightness standards, backed by rigorous helium leak detection testing.
Precision on Critical Components
From thin-wall vacuum vessels to high-vibration aerospace components, our welding process adapts to material, thickness, and geometry—without distortion or burn-through.
Certified for Clean Environments
For semiconductor manufacturing equipment, we follow strict contamination-control protocols. No particles, no outgassing—just clean, reliable seals.
Extreme Temperature Readiness
Cryogenic vessels demand welds that survive thermal cycling from –196°C to ambient. Our seal welding process ensures ductility and strength at every temperature extreme.
Industries We Serve
Aerospace,Semiconductor,Cryogenics,Vacuum Science,Medical & Pharma.
What is Helium Leak Detection?
Imagine trying to find a pinhole leak in a vacuum system or a fuel tank. Water tests take forever, and bubbles aren’t sensitive enough. That’s where helium steps in.
Helium Leak Detection is the gold-standard method for finding microscopic leaks in sealed components.
Why Helium Works
- Helium atoms are tiny and inert—they slip through leaks that trap air or water.
- A mass spectrometer “sniffs” helium with sensitivity down to 1×10⁻¹² mbar•L/s.
- Two methods: spray helium on an evacuated part (vacuum test) or trace escaping helium from a pressurized part (sniffer test).
Pre-Test Must-Dos
- Clean surfaces—oil and dust trap helium, causing false readings.
- Tighten unions (Swagelok/VCR) carefully—no over-torquing.
- Confirm assembly matches drawings.
- Seat O-rings and gaskets perfectly—no rolls or pinches.
- Torque bolts to spec, using a crisscross pattern.
- Polish scratches on sealing surfaces—they’re direct leak paths.
Custom Fixturing Is Critical
- One-size-fits-all clamps fail—each geometry needs tailored tooling.
- Keep blind plates, pneumatic connectors, clamps, and matched gaskets (copper, Viton, nylon) on hand.
Done right, helium detection becomes a reliable, repeatable quality gate—not just a test.
Industries We Serve
Need leak-tight seal welding? We weld vacuum vessels, aerospace parts & semiconductor chambers – then prove it with helium leak detection.
Vacuum Science
Fuel tanks, manifolds, structural housings.Vibration-resistant seal welding.
Semiconductor
Process chambers, gas lines, load locks.Particle-free, high-purity seals.
Aérospatiale
Fuel tanks, manifolds, structural housings.Vibration-resistant seal welding.
Cryogenics
Liquid nitrogen vessels, transfer lines.Ductile welds for extreme cold.
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FAQ
Q1. Can you weld thin-wall vacuum vessels without warping?
Yes. We use low-heat-input techniques and fixturing to control distortion—even on sub-1mm materials.
Q2: Do you certify welds for aerospace components?
Absolutely. We provide full traceability and can certify to NADCAP or your internal spec.
Q3: Is helium leak detection always included?
By default, yes. For semiconductor manufacturing equipment et cryogenic vessels, we recommend it as mandatory.
Q4:What's your typical lead time for seal welding?
15–21 business days for prototyping; production schedules negotiated per project.
Ready for a Seal You Can Trust?
Don’t let a failed weld cost you time, money, or safety.
Send us your drawings, material specs, and leak-rate requirements. We’ll respond with a fixed quote, a proposed WPS, and a delivery date.
Contactez-nous to discuss your vacuum vessels, aerospace components, cryogenic vesselsou semiconductor manufacturing equipment needs.