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Tuesday, May 18, 2021

Crane-Hydra-Deployment for Lifting-Lowering-Risk Assessment

Activities

  • Preparation and checking before entry
  • Entry inside plant
  • Preparation and checking before Lifting
  • Lifting/ Lowering of the load

Hazards

  • Fire extension due to spark generated
  • Damage due to hitting against pipe/equipment
  • Injury to people around
  • Property damage / Exposure to toxic release/ fire due to falling of lifted load/ crane toppling due to improper usage of the crane
  • Exposure to HC/toxic release due to Crane rope getting entangled with a small-bore connection
  • Property damage / toxic release/fire due to dropping of the load to slippage of slings, rupture of slings, crane brake failure, rupture of crane rope wire, slippage of rope wire from the anchor point
  • Property damage/ exposure to toxic release/fire due to toppling or collapse on the crane
  • Electrical shock hazard due to entangling with overhead electrical cables
  • Hazard due to high wind velocity

Control Measures

  • Crane/ Hydra must have a valid permit for entry inside red roads
  • Crane/ Hydra must be certified for use by the P&M department
  • Driver must have a safe driving licence. Spark arrestor must be healthy
  • Check LEL in the proposed route of the Crane/ Hydra. Switch off the engine and evaluate if the F&G alarm is sounded
  • Crane/ Hydra will move with a speed of less than 10 Kmph
  • Identify all pits near to the route, barricaded /highlight if required
  • Use wheel jammers to prevent accidental movement of the Crane /Hydra
  • Keep the Crane / Hydra on gear when parked. Follow Vehicle entry procedure
  • Do not leave the crane / Hydra unattended when parked near plant and machinery
  • Do not allow to move people in the route of Crane/ Hydra
  • Crane/ Hydra reverse horn must be working and assistant to guide while reversing

Following things are to be ascertained before lifting:

  • Object load;
  • lift radius;
  • load height;
  • load centre of gravity;
  •  load suspension point;
  • Slew Limitation;
  • counterweight;
  • Bearing load on the ground;
  • Safe working load;
  • Object dimension (if more than 25m2), safe approach. Also, give the request form to P&M depth so that the correct crane is allocated
  • Check on Crane /Hydra:
  • Crane load test certificate, Daily log sheet, Fortnightly / monthly service and inspection checklist must be available and updated. The safe load indicator (SLI) is working. If not working capacity loading will not exceed 60%.
  • All limit switches are functioning. The free-fall system is blocked.  No hydraulic oil leakage 
Lifting plan to be prepared if: 
  • load wt is more than 15T or Boom length above 55m or two cranes used for single lift or capacity loading more than 85% or using mobile crane rated above 200T     
  • Identification and marking any small SBC at risk and pointing out the risk to the crane operator and signaler
  • Lifting weight to be with guide rope. Optimal setting of the crane and restricting crane movement. Also barricade the crane
  • Crane has undergone regular and competent service, inspection
  • Control of slings wear and tear and the attachment to the load
  • Crane capacity loading (85 % with working SLI, 60 % if SLI is not working)
  • Load weight and lifting radius must be known and within crane capacity
  • The area must be barricaded; people should not be allowed under lifted load
  • low capacity loading, working SLI, setting of crane outriggers on the solid foundation
  • Proper operators under the outrigger’s required. The outriggers must always be extended in their full length
  • Elec. Overhead line is at least 6.0 m above from tip of the crane
  • Wind speed should be less than 19.4 knots (35 km/hr). For personnel lifting wind speed should be less than 14 knots
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