1. The basic structure of the steel drum: the bottom of the barrel, the barrel body, the top of the barrel, the closure (closed barrel closure and open barrel closure). 2. Development of steel drum structure: • Structure and use of tapered steel drum; • Structure, use and type of closure of open steel drum; • Remaining steel drum structure: closure structure, barrel top structure. • Structure and use of steel-plastic composite drums.
1. Steel drum coating: environmental protection requirements and development of water-based coatings, development of pre-coated coils, development of laminated sheets. 2. Coating in steel drum: compatibility and construction conditions of inner coating and internal cargo. 3, sealant: the choice of sealant, compatibility with the goods.