Rolling Hoops are the hooped expansions that are located in the body of a drum that act as reinforcement rings to permit easy handling of the filled drums. Most drums fall in the range of 0.9 – 1.5 mm thick. That would mean that the top is 1.2 mm thick (18 gauge), the body is 0.9 mm thick (20 gauge), and the bottom is 1.5 mm thick (16 gauge). Most drums display the thickness of the drums in parts, top/body/bottom (1.2/0.9/1.5). A lighter container will most certainly not stand up as well.
The gauge used will not always be reflected in the performance of the container with regard to it’s UN marking, but a sturdier container will certainly stand up better to the rigors of transportation. Thicker drums, that are UN Certified, are recommended for shipping hazardous liquids, as they’re stronger than thinner drums. Generally the heavier and thicker the gauge of steel used to manufacture the container, the sturdier the container will be in service. The thickness (1.2 mm) or gauge (18 gauge) of the steel is important depending on the reason you’re using a drum. Pneumatic ones are used in production lines for high production. Pneumatic and hand-operated cap-seal crimping tools are available. Once cap-seals are crimped, the plugs can be unscrewed only by breaking these cap-seals. These cap-seals sit on top of the flanges and are ‘crimped’ using drum cap-seal crimping tools (also called drum cap sealers). To secure the contents of the drums against theft and adulteration during shipment, cap-seals are used. Once drums are filled, plugs (bungs) are screwed in the flanges using pneumatic or hand operated bung tightener (plug or torque wrench). Unlike straight pipe threading, NPT threaded fittings will pull tight to make a liquid-tight seal. Most steel drums have NPT (National Pipe Thread Taper) threaded openings. The flanges are the closure attachments that are permanently inserted into the drum and provide the receiving threads for a plug. Steel drums typically have two openings (bung holes) with flanges, 2″ and 3/4″ in diameter, in the top of the container (or cover for open head drums). There is no hard and fast rule on what gasket / drum combination are compatible, it is however not permissible to change one gasket type for another unless the container has been tested with both.įittings – Bung Holes, Flanges, and Plugs (Bungs) It is important to note that a United Nations certified container must use the tested gasket in order not to invalidate the test certification.
Gaskets also vary in terms of performance, specifically the profile (shape) which affects the UN Rating of the drum. All gaskets have different properties that make them more suitable for certain applications. Most common gasket materials are EPDM, Neoprene, Teflon, Rubber and Cellulose.
There is a large variety of gaskets both in material and profile (shape).
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