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TIGTechs Insights

TIGTechs Welding Team

The TIGTechs welding team writes about precision TIG welding, stainless fabrication, weld codes and metallurgy from our Dallas, Texas shop.

All articles Process Guides Standards & Compliance Metallurgy Procurement
Stainless steel fermentation tanks in a processing plant
November 1, 2026

FDA and 3-A Sanitary Standards for Food-Grade TIG Welding

FDA rules say food-contact seams must be smoothly bonded. 3-A Sanitary Standards add the details, including a 32 µin Ra finish. Here is how welds create bacteria traps, how sanitary welds are made, and what to ask a supplier.

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Stainless steel process piping and vessels
November 1, 2026

Preventing Sugaring (Granulation) in Stainless Steel Tube Welding

Sugaring is crusty oxidation on the inside of a stainless weld. It cuts corrosion resistance and fails sanitary inspection. Here is the physics, the oxygen targets, a step-by-step argon back-purge setup, and the equipment list.

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TIG welder feeding filler rod into a stainless steel joint
November 1, 2026

ER308L vs. ER316L TIG Filler Rods: Engineering Specifications

ER316L adds 2 to 3% molybdenum for chloride resistance; ER308L does not. Compare chemistry, typical strength, and PREN side by side, and learn when the 316L premium is worth paying.

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Close-up of a jet engine fan
November 1, 2026

AWS D17.1 Aerospace Welding Standards: A Procurement Guide

AWS D17.1 sorts aerospace welds into Class A, B, and C by what happens if they fail. Here is how the classes differ, what visual inspection must cover, how defect limits tighten, and what to put on your purchase order.

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Stainless parts resting on technical drawings
November 1, 2026

The True Cost Drivers of Outsourced B2B TIG Fabrication

Skilled labor drives most of a TIG fabrication quote, followed by testing, consumables and material. Here is what sits behind each line, with an illustrative breakdown and ways to lower total cost.

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Brushed stainless steel surface
November 1, 2026

Managing Heat Input: Preventing Warpage in Thin-Gauge Stainless

Thin stainless warps because it holds heat and expands more than carbon steel. Here is how to set amperage, calculate heat input and use chill blocks, pulse TIG and stitch welding to keep parts flat.

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Workers in a cleanroom manufacturing area
November 1, 2026

Class 100 Cleanroom TIG Welding for Semiconductor Fabrication

UHP gas lines need electropolished 316L tube, autogenous orbital welds and a clean purge. Here is what Class 100 means today and how manual and orbital TIG compare.

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Machined stainless steel parts on a shop table with drawings
November 1, 2026

Carbide Precipitation (Sensitization) in Stainless Welds

Sensitization strips chromium from grain boundaries and opens the door to intergranular corrosion. Here is how it forms in the HAZ, how to prevent it, and how inspectors test for it.

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Network of industrial metal pipes and valves
November 1, 2026

ASME Section IX: Certifying TIG Welds for Pressure Vessels

ASME Section IX qualifies the procedure and the welder, not the vessel. Here is how a TIG WPS moves from draft to PQR to WPQ, and which tests each production weld must pass.

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