Operators may lift type "U" BOP's separately or as assembled stacks. Lifting Plates have capacities rated to lift assembled stacks, but operators must assure the complete stack weight does not exceed the capacity of the lifting equipment, from the plates through all connections to the hoisting mechanism.

Each new Lifting Plate has a rated capacity marked on the plate. This rated capacity requires specific torque for specified bolts and nuts securing the Lifting Plate to the BOP. These bolt and nut grades and torques appear in Table 3 of this document. See page 8 of this catalog.

Use plates only in pairs with 4 studs and 4 nuts for each plate. See page 9 of this catalog.

Figure 3 on the next page provides an example of an assembled BOP stack. Use the catalog listed weight of each BOP added together, plus an allowance for Spools, Adapters, bolting and other accessory equipment, for an estimated total weight for lifting. A properly sized spreader bar must minimize the angular pull on lifting lines. Operators must never lift assemblies that weigh more than the rated capacity of lifting components or connecting links.

Operators should always avoid shock loading of any lifting equipment or attachment points on equipment used for lifting. Accidental shock loading requires careful inspection of all connecting points and linkages subjected to the shock.