API-RP-2D-OPERATION AND MAINTENANCE OF OFFSHORE CRANES - download pdf or read online

By API

This suggested perform establishes common rules for the secure operation and upkeep of offshore pedestal-mounted revolving cranes on fastened or floating offshore systems, offshore aid vessels, jackup drilling rigs, semi-submersible drilling rigs and different different types of cellular offshore drilling devices (MODUs). This record additionally offers requisites and proposals for group of workers education, raise making plans, pre-use inspection, and trying out of transitority cranes which are erected offshore.

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Installing a rope so that a reverse bend is put into it causes the rope to become “twisty,” difficult to handle and spool smoothly on the drum. This is especially true for large diameter wire ropes. A breaking action should be applied to the reel at all times—use a block or timber against the reel flange—in order to get a good smooth wrap on the drum. 7 COPYRIGHT 2002; American Petroleum Institute Document provided by IHS Licensee=Qatar Petroleum/5943408103, User=, 10/11/2002 23:29:59 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584.

Since the test loads are based on the crane rating chart, the Qualified Inspector must be familiar with the applicable load rating chart. 1 is a graph of capacity vs. radius for a typical crane. 1. The load rating chart will show the maximum capacity for each radius. Note the shaded area for the typical crane rigged with two-part line and the transition points A and B. To the left of point A, the rated load is limited by the available hoist line pull and wire rope strength. Between points A and B, the rated load is limited by the over turning moment (OTM); and to the right of point B, the rated load is limited by the boom suspension system.

Hoist circuits ___________________________ B. Boom circuits ___________________________ C. Swing circuits ___________________________ -- COPYRIGHT 2002; American Petroleum Institute || | | || ||| || | |||| || | |||| || || | | |||--- Document provided by IHS Licensee=Qatar Petroleum/5943408103, User=, 10/11/2002 23:29:59 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584. M. 1—Capacity versus Radius for a Typical Crane COPYRIGHT 2002; American Petroleum Institute Document provided by IHS Licensee=Qatar Petroleum/5943408103, User=, 10/11/2002 23:29:59 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584.

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