Tube end expansion / seal welding
Tube end expansion / seal welding capability for titanium components
What is Tube end expansion / seal welding?
Tube end expansion / seal welding capability for titanium components
Certified welding capability for Tube end expansion / seal welding, with full inert gas shielding, weld procedure qualification, and operator certification.
Engineering Parameters & Capabilities
Gas Tungsten Arc Welding (GTAW/TIG) for titanium uses a non-consumable tungsten electrode with argon shielding at the torch face, trailing shield, and backup purge. Titanium's reactivity above 600°C demands complete oxygen exclusion until the weld zone cools below 300°C, specifically for tube. Precision tube for chemical, aerospace, and medical applications presents unique challenges: wall thickness uniformity (±0.05 mm) over long lengths, internal surface finish Ra < 0.8 µm for fluid flow, and bent tube ovality control.
| Parameter | Specification |
|---|---|
| Heat Input | Low — narrow HAZ (1–3 mm) |
| Shielding | Argon face + trailing shield + backup purge |
| Weld Speed | 100–300 mm/min (manual); 1000 mm/min (orbital) |
Engineering Capabilities & Limits
Certified welding capability for Tube end expansion / seal welding, with full inert gas shielding, weld procedure qualification, and operator certification.
Hole Types Supported
Heat Control Measures
Triple-shield argon protection: torch nozzle, trailing shield (10–20 L/min), and backup purge. Interpass temperature is monitored with an IR pyrometer; maximum 120°C between passes.
Flatness & Stress Relief
Welding fixture with copper backup bars for heat sinking. Sequenced stitch welding pattern to balance thermal stresses.
Tolerance
Weld distortion: +0.5 mm typical; +0.1 mm with fixture
Typical Applications & Components
This process is used to manufacture the following titanium components.
Secondary Operations & Downstream Processing
Enhance your component with our integrated downstream services:
Dye Penetrant Inspection
PT per ASTM E1417 for weld surface defects.
Weld Color Inspection
Classification per AMS 4901: silver/gold acceptable; blue/purple rejected.
Tube Bending
Tube bending for tube end expansion and seal welding components.
Weld Preparation (End Bevelling)
Weld Preparation (End Bevelling) for tube end expansion and seal welding components.
Hydrostatic Pressure Test
Hydrostatic pressure test for tube end expansion and seal welding components.
Quality Assurance & Inspection
Inspection Items
- Tube end expansion / seal welding specific dimensional verification (CMM / vision)
- Material grade verification (PMI / OES spectrometer)
- Fluorescent Penetrant Inspection (FPI) per ASTM E1417
- Biocompatibility validation per ISO 10993
Quality Standards & Certifications
- ISO 9001:2015 — Quality Management System
- AS9100D — Aerospace Quality Management
- ASTM B265 — Titanium Strip, Sheet, and Plate Standard
- ISO 13485 — Medical Device Quality Management
Frequently Asked Questions
What titanium grades are suitable for Tube end expansion / seal welding?
What tolerances can be achieved with Tube end expansion / seal welding?
What quality certifications apply to Tube end expansion / seal welding?
What is the typical lead time for Tube end expansion / seal welding projects?
Can you provide DFM feedback for my Tube end expansion / seal welding design?
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Guidance for the professionals who specify titanium
Role-specific answers and resources for engineers and buyers in this industry.
Common questions from this audience
What quality systems and certifications do you hold?
AS9100D, ISO 9001, ISO 13485, NADCAP and ITAR-compliant — with full material traceability and in-house CMM inspection.
How do you verify dimensional quality?
In-house CMM metrology and GD&T validation per ASME Y14.5, with first article inspection reports.
Do you provide engineering support and DFM?
Yes—engineering support for DFM, material selection, and tolerance feasibility.
Related resources
Request a quoteOne Metal. One Focus. Infinite Precision.
Founded in 2011 in Baoji's Titanium Valley, BOZE Metal is dedicated exclusively to titanium — from raw material to precision engineering. AS9100D, ISO 13485 & ISO 9001 certified with 500+ clients across Aerospace, Medical & Motorsport industries, we deliver end-to-end precision titanium CNC machining with full material traceability from source to component.
Boze Titanium Manufacturing Center is operated by Baoji Boze Metal Products Co., Ltd.