1A2 is the UN code for an open head steel drum. They are a strong, sturdy container with many uses and come in a variety of sizes. Since an open head drum has a removable lid there are necessary closures attached to the head that prevent the lid from detaching during use. The two types of closure are are a bolt ring or lever lock. Effective closure options, bolt ring and lever lock, ensure the drum heads are safely secured to the body during storage and transport.
If using a lever lock closure, make sure the gasket is properly fitted on the cover and sealed when in contact with drum curl. Open the lever lock to expand the ring so it will fit onto the drum cover. Then, slowly and cautiously close the lever lock to engage the outer ring with the body of the drum. To complete the closure, lock the ring and make sure you are following the specific Closure Instructions.
When using a bolt ring closure you first want to make sure the gasket is fitted into cover groove and that the gasket is properly sealed when the cover in on the drum. You should position the ring to ensure it connects the drum curl and cover. Insert the bolt and thread the hex nut to close the ring; using a calibrated torque wrench, tighten the bolt. Continue this until the torque is stable, usually this is between 55-60 lbs. Tighten the nut once more and you have successfully attached your bolt ring closure to the drum. To complete the closure, lock the ring and make sure you are following the specific Closure Instructions.
The lever lock is a quicker way to close open head drums, since it doesn’t require tools or measuring. However both are safe and effective measures. The important thing to keep in mind is using each closure properly. You should always make sure that you are using the proper container for whatever contents you need stored or shipped; this may mean a Skolnik 1A2 drum, or it may require something else. Preventing accidents begins with understanding which drum is right for the current situation.