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IX of the ASME BPVC
ASME
P-Numbers
Structural
Welding
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GTAW Welding
| Gas Tungsten Arc Welding (GTAW) is frequently referred to as TIG
welding. TIG welding is a commonly used high quality welding process.
TIG welding has become a popular choice of welding processes when high
quality, precision welding is required.
In TIG welding an arc is formed between a nonconsumable tungsten electrode and the
metal being welded. Gas is fed through the torch to shield the electrode
and molten weld pool. If filler wire is used, it is added to the
weld pool separately. |
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TIG Welding Benefits
- Superior quality welds
- Welds can be made with or without filler metal
- Precise control of welding variables (heat)
- Free of spatter
- Low distortion
Shielding Gases
- Argon
- Argon + Hydrogen
- Argon/Helium
Helium is generally added to increase heat input
(increase welding speed or weld penetration). Hydrogen will result in
cleaner looking welds and also increase heat input, however, Hydrogen may
promote porosity or hydrogen cracking.
GTAW Welding Limitations
- Requires greater welder dexterity than MIG or stick welding
- Lower deposition rates
- More costly for welding thick sections
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Common GTAW Welding Concerns
We can help optimize your welding process variables. Evaluate your
current welding parameters and techniques. Help eliminate common
welding problems and discontinuities such as those listed below:
- Undercutting
- Tungsten inclusions
- Porosity
- Weld metal cracks
- Heat affected zone cracks
TIG Welding Problems
- Erratic arc
- Excessive electrode consumption
- Oxidized weld deposit
- Arc wandering
- Porosity
- Difficult arc starting
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If your company is experiencing these or other welding problems you can retain
us to improve
your weld processing. Hire us to act as your welding
specialist.
Contact Information
- Telephone
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407-880-4945 -------- (Consulting is only available for customers)
- FAX
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- Postal address
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- Electronic mail
- General Information:
bob@WeldingEngineer.com
Customer Support:
bob@WeldingEngineer.com
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