Dear Sir,

1. the top is 12mm thk, bottom is 10mm thk, lower shell(2160mm high) 9.5mm thk,upper shell (2500mm high)6.8mm thk, total shell high is 4660mm, diametre is 5000mm, how to identify the casing? We should choose the  inside or outside casing to indentify?

2. I have 8 hold down lugs on the tank bottom knuckle, how to add fixture on the lugs?

Thanks!

Eric