Flat wall tanks are manufactured according to customer designs and relevant welding procedures Maximum dimensions are 6000 mm x 6000 mm x 6000 mm. Maximum total weight is 10000 Kg. Shot-blasted according to surface quality Sa 2½. Surface treatment according to ISO 12944; C3, C4, C5I and C5I+M Flat wall tanks are subject to visual controls, paint thickness controls and leakage test under pressure according to customer specifications.