About the kegs, I have a question to confirm with you .
Last time we want the show you the best kegs, we polish the kegs welding line all clean. This method though looks very beautiful, but have some problem:
1) Long time force polish the welding line , the position of welding inside will be scorch easily , though the scorch could be cleanning, but the position still will have different color inside.
2) Long time force polish , that position the stainless steel plate and welding seam will be thinner , so the Anti-Pressure will be lower .
3) Long time force polish , some place the welding seam thinner and thinner may polish to gas leaking directly .
So consider all problem above , and refer to other manufacturer's keg all left the welding line, we now don't polish the welding line all clean , but just do some polish embellish to weldiing seam , make it smaller and lighter.