30/10/2020
1.OKM JAPAN ,chain sling
2.Where chain has to pass round a sharp corner, use suitable packing to give the chalin some protection. To ensure a level lift the crane hook should be vertically above the CG of the load. If in doubt, lift just clear of tilts, land the load and re-position the sling Always have a prepared landing site ready to receive the load. Where appropriate use tag lines to control the load. When ifting operations are finished,slings must be stowed on a purpose made rack where they will be safe from damage.
3.Chain slings are available in a range of material grades, sizes and assemblies. VDetermine the maximum WEIGHT of LOAD Determine the TYPE of sling required (by the contiguration of the load, endiess, single, two, 3 or 4 leg) From the , determine the size of the body chain for the sling. (Consideration the effect of the ANGLE shown) vSelect the matching ATTACHMENTS required (Le. with shortening clutches, hook, master link) v Determine he REACH required to give the desired angle. For use at temperatures exceeding 200°C or below minus 40°C refer to the suppliers instructions. Where slings may come into contact with chemicals, particularity acdids or acidic fumes, consult the supplier.
4.Chains should always be loaded in a straight line and only shortened by using a shortening clutch. • They must never be shortened by knots or by twisting them. The master link must fit on the crane hook. When chains are not in use they should always be hooked back to the master link. Bearers should always be used to ensure the chain can be withdrawn safely on supported loads. If the load is landed onto the chains it will damage them
5.WORN LINK Excessive wear and a reduction of material diameter, espacially at the bearing points. See table for minimum allow able mmink thickness. To prevent keeping load weights within the rating of the sings being used will give the maximun sling wear life. GOUGED LINKS Indentations on an otherwise smooth link surface. To prevent, protect sling from heavy loads being dragged or dropped onto the chain. HEAT Discolored are as of chain. To prevent high temperatures to affect alloy chain strength at 400 F. Use table of reductions. STRETCH Indicates the sing has been extremely overioaded or subjected shock loading. Links that do nơt hinge freety with adjacent link are streiched and must be taken our of service, however, stretch can occur without this indicator BENT LINKS Occurs in only one or two adjacent inks. Links will have an irregular shape when compared to ofber links. To prevent, lond edges must be padded to protect both chain and bad because are ununly the rosult of the chain going around the sharp WELD SPATTER inp puo e jo otpo Motalic bumps on any link of chvn To provent the heat from weid spater can adversaly alfect the seuth of a chain link. Slings must be shielded from welding operalions
