1.Handholes should be smooth and no burrs, shape and dimension are comfortable for adult to handle.
2.Outsurface of keg should be clean no grease or smudginess.
3. No foreign matters inside of kegs.
Welding:
TIG welding that protected by inert gases, can make sure full penetration and no defect. Welding should be smooth, plain, in one straight line without point or pin hole or other defect. To prevent microbiology or residual yeast to pollute beer after washing kegs. Keep fresh flavor and taste of beer.
Both inside and outside welding at neck will secure strength of neck.