GTAW Welding (TIG)
Precision Tungsten Inert Gas (TIG) Welding Services
Lynn Welding provides Nadcap accredited precision fusion welding services and specializes in GTAW (Gas Tungsten Arc Welding).
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GTAW approved Welder: 42” diameter titanium ring with 24 X-rayed weld joints.
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Aluminum duct assembly Welded by NADCAP approved welders.
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Inconel housing tach welded per AWS D17.2.
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GTAW welding per Mil-W-8611 of stainless steel fuel system components.
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Titanium component welded in a vacuum chamber.
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Stainless steel welded component for the civil aerospace market.
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Aluminum Aerospace Tooling component by Lynn Welding, a GTAW approved Welder
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Stainless Steel Aerospace tube weldments.
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Class A, Type 1 Aluminum Welding - We are a GTAW approved Welder
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Manual Gas Tungsten Arc Welding (GTAW) per Mil-STD-2219 Stainless Steel Class A.
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Titanium components welded in a vacuum chamber.
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Manual Gas Tungsten Arc Welding (GTAW) per AWS D17.1.
Precision TIG or GTAW (Gas Tungsten Arc Welding)?
Precision TIG welding can be used and applied to different industries such as aerospace, medical and automotive. GTAW process is suitable for welding all material due to electrode is not melting during the welding operation.
The electrode is made of tungsten alloy which can tolerate a very high temperature and would allow to weld at low current and weld as thin as 0.005-inch-thick material.
Filler material or welding wire/rod is used externally and will be consumed during the welding process. Precision GTAW can be performed using DCEP (Direct Current Electro Positive) which focuses on heating the electrode and DCEN (Direct Current Electro Negative) which focuses on heating more the base material.
AC is typically used when welding aluminum because it helps with the cleaning as well and to prevent potential porosities and cracks.
Inert gas is used during the precision welding process and it works as a shield to protect the weld from contamination. Usually Argon is the most common gas for the GTAW process and sometimes helium is used as well.
The GTAW process is very clean process and requires high skilled welders to perform the welding. That is the reason that GTAW is used for very critical application such as the aerospace industry. GTWA produces a high-quality weld to assure successful joint and great appearance.
Here is a photo below shows the element used in the GTAW process. 
Source: American Welding Society
One of the potential issues to watch for while using the precision GTAW process is contamination. The base material and the filler material have to be extremely clean to produce a high-quality weld. If the base material, filler material is not clean and there was some moisture surrounding the weld area, that would affect the quality of the weld and perhaps will lead to potential defects.
Our team is trained and experienced to produce a high-quality weld and successful results. We often consider GTAW as the more glamourous welding process.
Lynn Welding is qualified to weld per AWS D17.1, PWA 16, MIL-STD-2219, HS 191 and many other aerospace welding certifications.
Lynn Welding is AWS D17.1 Certified, view our other precision aerospace welding approvals below.
Lynn Welding's GTAW Welding (TIG) Approvals
Raytheon
Lynn Welding is a well known Raytheon Approved Welding company when it comes to welding and machining for the Aerospace, Defense, Nuclear, Industrial, and Medical industries.
Raytheon Approved Fusion Welding
- D17.1 (Specification For Fusion Welding For Aerospace Applications)
- WS33739 (Process Specification For Aerospace Fusion Welding)
- AWS D1.1 (Carbon Steel)
- AWS D1.2 (Aluminum)
- AWS D1.3 (Structural Welding Code - Sheet Steel)
- AWS D1.6 (Stainless Steel)
- AWS D9.1 (Sheet Metal)
Raytheon Approved Torch Brazing
Boeing
Lynn Welding holds a certification from Boeing for Fusion Welding & Resistance Welding. All Procedures are GTAW-MA (Gas Tungsten Arc Weld-Manual)
Boeing Approved Fusion Welding
- D1-4426 (Processor Basic Quality System for D1-4426 approval only Quality System)
- BAC 5975 (Fusion Welding - CRES Heat Resist Nickel - Cobalt Alloys BAC 5975)
- MIL-STD-2219 (Fusion Welding for Aerospace Applications - Aluminum Alloys MIL-STD-2219)
- BAC 5975 (CRES Heat Resist Nickel - Cobalt Alloys)
- AMS-STD-2219 (Aluminum Alloys)
- MIL-W-8604 (Aluminum Alloys MIL-W-8604)
Boeing Approved Torch Brazing
Nadcap
Lynn Welding holds a NADCAP-Approved Welding Certification for Resistance Welding, Fusion Welding, & more.
Nadcap Approved Fusion Welding
- PWA 16 (Pratt and Whitney Approved) (GTAW Welding)
- BAC 5975 (Boeing Approved) (GTAW Welding)
- CPW 24 (Pratt and Whitney Canada Approved) (GTAW Welding)
- AWS D1.3 (GTAW Welding)
- AWS D1.4 (GTAW Welding)
- AWS D1.6 (GTAW Welding)
- AWS D1.9 (GTAW Welding)
- BPS 4404 (Bell Approved) (GTAW Welding)
- AMS-ST0-2219 (ULA Approved) (GTAW Welding)
- AWS D1.1 (GTAW Welding)
- Gamps 2302 (Gulfstream Approved) (GTAW Welding)
- HS 191 (UTAS Approved, Formerly Hamilton) (GTAW Welding)
- AWS D1.2 (GTAW Welding)
- Ground Combat Vehicle Welding Code 12479550 (GTAW Welding)
- EPS 14530 (Rolls Royce Approved) (GTAW Welding)
- P8TF3 (GE Aviation Approved) (GTAW Welding)
- D17.1 Class A, B and C (GTAW Welding)
- Mil-STD-2219 Class A, B and C (GTAW Welding)
- AMS 2685 (TIG Welding)
Bell Helicopter
Lynn Welding is Bell Helicopter approved for Resistance Welding and Fusion Welding processes, and preparation of metals.
Bell Helicopter Approved Fusion Welding
General Electric
Lynn Welding holds a certification from GE Aviation for Fusion Welding, Brazing, & Resistance Welding.
General Electric Approved Fusion Welding
- CS00 (Titanium Welding)
- M50T1 (CS – Welding all Processes)
- P8TF3 (Gas Shielded Arc Welding)
- P8TF11 (Gas Tungsten Arc, Gas Metal Arc And Plasma Arc Welding)
- P21TF6 (In-Process Welding Of Castings)
General Electric Approved Torch Brazing
Rolls-Royce
We are Rolls Royce Corp. Sub Tier Supplier (RRU6) for Fusion Welding and Resistance Welding, Spot and Seam
Rolls-Royce Approved Fusion Welding
Collins Aerospace (Hamilton Sunstrand / UTAS)
All Procedures are GTAW-MA (Gas Tungsten Arc Weld-Manual)
Collins Aerospace (Hamilton Sunstrand / UTAS) Approved Fusion Welding
Kaman Aerospace
Approved by Kaman Aerospace for Fusion Welding, Resistance Stitch Welding, Resistance Seam Welding.
Kaman Aerospace Approved Fusion Welding
Pratt & Whitney Canada
Lynn Welding is a Pratt & Whitney Canada Approved Welding Facility for Fusion Welding, Resistance Welding, and Tack Welding.
Pratt & Whitney Canada Approved Fusion Welding
- CPW 24-1A (Carbon and Low Alloy Steels)
- CPW 24-2AJ (Corrosion-resistance steels other than Precipitation Hardenable)
- CPW 24-22A (Precipitation Hardenable, Corrosion-resistance steels)
- CPW 24-3AJ (Nickel and Non-precipitation Hardenable Nickel Alloys)
- CPW 24-33AJ (Precipitation Hardenable Nickel Alloys)
- CPW 24-6AJ (Commercial Pure Titanium)
- CPW 24-66AJ (Titanium Alloys)
- CPW 24-7A (Cobalt Alloys)
Northrop Grumman
Approved by Northrop Grumman for Fusion Welding & Resistance Welding. All Procedures are GTAW-MA (Gas Tungsten Arc Weld-Manual)
Northrop Grumman Approved Fusion Welding
United Launch Alliance
United Launch Alliance welding certifications. All Procedures are GTAW-MA (Gas Tungsten Arc Weld-Manual)
United Launch Alliance Approved Fusion Welding
- AMS-STD-2219 (Fusion Welding (All Types))
- AC 7004 / AS 9003 (NADCAP Accreditation to AS 9003)
- AC7110/5 (Fusion Welding)
- AC7110/13 (Metal Evaluation of Welds)
- AC7110/12 (Operator Qualification)
- AC7110 (Welding/Brazing)
United Launch Alliance Approved Torch Brazing
Sikorsky
Lynn Welding holds a Sikorski-Approved Welding Certification for Fusion Welding, Brazing & Resistance Welding
Sikorsky Approved Fusion Welding
General Dynamics
Lynn Welding is approved by General Dynamics for Fusion Welding, Resistance Welding, Spot, Seam and Stitch
General Dynamics Approved Fusion Welding
Pratt & Whitney
Lynn Welding is a LCS Approved Welding Facility for Fusion Welding, Resistance Welding, and Tack Welding.
Pratt & Whitney Approved Fusion Welding
- PWA 16-1 (Carbon and Low Alloy Steels)
- PWA 16-2 (Corrosion-resistance steels other than Precipitation Hardenable)
- PWA 16-22 (Precipitation Hardenable, Corrosion-resistance steels)
- PWA 16-222 (Cres. Precipitation Hardenable Alloys)
- PWA 16-3 (Nickel and Non-precipitation Hardenable Nickel Alloys)
- PWA 16-33 (Precipitation Hardenable Nickel Alloys)
- PWA 16-37 (Ni & Non Precip. Hard. Nickel Alloys Welded To Cobalt Alloys)
- PWA 16-333 (Ni & Non Precip. Hard. Ni Alloys Welded To Precip. Hard. Ni Alloys)
- PWA 16-4 (Aluminum Alloys)
- PWA 16-6 (Commercial Pure Titanium)
- PWA 16-66 (Titanium Alloys)
- PWA 16-666 (Titanium Alloys, Special Alloy Filler Metal Requirement)
- PWA 16-7 (Cobalt ALLOYS)
- PWA 16-733 (Cobalt to Nickel Alloys)
Pratt & Whitney Approved Tack Welding
Gulfstream
All Procedures are GTAW-MA (Gas Tungsten Arc Weld-Manual)
Gulfstream Approved Torch Brazing
Gulfstream Approved Fusion Welding
Hawker Beechcraft
We are an approved Hawker Beechcraft welder and fabricator for Fusion Welding and Resistance Welding, Spot and Seam
Hawker Beechcraft Approved Fusion Welding
GTAW Welding (TIG) Blog Articles
Nadcap and What it Means for Aircraft Quality
Jan 13, 2021
Keeping aircraft production at peak levels while continuing a track record for safety means the need for reliability and quality manufacturing. Aerospace vendors must produce safe and efficient airplanes while simultaneously seeking new technology and equipment to drive the industry forward.
Fusion Welding Per AWS D17.1
Oct 1, 2020
The AWS D17.1 specification contains all applicable and necessary guidelines for non-destructive examination and fusion welding (NDE) of aerospace flight hardware, and the welding and NDE of non-flight hardware.
GTAW Welding of Aluminum and the Importance of a Proper Cleaning Procedure
Mar 6, 2020
In this article we will discuss how the demand for aluminum has shifted in the aerospace industry, the difficulties typically experienced with aluminum welding and how these factors have adapted Lynn Welding Inc.’s aluminum cleaning method, more specifically within the TIG Welding/Gas Tungsten Arc Welding spectrum.
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