Weld quality checks for metal chairs
A welded frame's strength is entirely in the weld. Here is what to look for at sample approval and at pre-shipment inspection.
Published by JP Furniture · Chair manufacturer in Foshan, China · 2026-09-26
What a good weld looks like
- Uniform bead with consistent width and no starts and stops mid-run.
- Full penetration — no visible gap between the bead and either tube.
- Clean toes where the bead meets the base metal, with no undercut groove.
- No spatter on adjacent surfaces, which signals poor machine settings or dirty stock.
The four checks
- Visual sweep of every joint under good light — look for craters, pinholes and missed sections.
- Racking test — twist the frame by hand and listen. Creaks point to incomplete fusion.
- Grind inspection on a sample unit — cut a joint open and check penetration depth.
- Load cycling per the specified standard, on one unit per production batch.
Finish hides welds — ask before coating
Powder coat fills minor imperfections, which is helpful and also convenient for hiding poor welds. Approve raw frames or request a pre-coating photo set as part of your QC gate.
Our QC process includes weld inspection before coating. Browse the iron and metal chair range.
