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Electric hoist basic: Hoist safety and pre-operation hoist inspection

15 Dec, 2016

As for hoist safety, the pre-operations inspection is very important. How do inspect your hoist before operation? Generally, the hoist safety inspection before operations concerns the topics, such as, what is the Hoist safety Standards and Regulations? What is the difference between frequent and periodic hoist inspection? How to make makings and labels? How to inspect your hoist controls before hoist operation? Operation inspection? How to inspect your hook and chain? Read on for detailed information now.jtAHenan Dongqi Machinery Co., Ltd

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FEM Hoist jtAHenan Dongqi Machinery Co., Ltd

Hoist safety and hoist inspection:Safety Standards and Regulations

Before hoist inspection, it is important to know and understand all the hoist safety and inspection standards which apply to your hoists. To different types of hoists, different standards are used, which may confuse you for the different regulations are used to different parts of the hoisting system.jtAHenan Dongqi Machinery Co., Ltd

Main safety standards to the main parts of the hoists

Besides OSHA regulations, the hoist design and inspection standards provided by ASME needs your attention.jtAHenan Dongqi Machinery Co., Ltd

  • ASME B30.16. ASME B30.16. Standard is applied to underhung powered hoists, such as, electric hoist and air hoists, and hand chain falls. This hoist standard covers construction, marking, inspection, use, and training.
  • ANSI E1.6-2. ANSI E1.6-2.hoist standards is applied in the entertainment industry. It is recommended that if you are in entertainment, it is better to obtain a copy of both hosts’ standards.
  • ASME B30.21:ASME B30.21, which applies to lever hoists, including chain, wire rope and strap hoists.

Examples on lever hoist inspection and whole hoisting system

Where it gets complicated is that, in many cases, there are multiple safety standards you need to understand to use or inspect a single hoist.jtAHenan Dongqi Machinery Co., Ltd

Example 1: Take the lever hoist inspection for example:jtAHenan Dongqi Machinery Co., Ltd

  • ASME B30.21 applies to the entire lever hoist
  • ASME B30.10 applies to hook inspection, how to use the hook properly, etc.

In this case, you have to understand two standards to ensure proper use and inspection of the lever hoist.jtAHenan Dongqi Machinery Co., Ltd

Hoist inspection: Lever hoist inspection and Hoisting system inspectionjtAHenan Dongqi Machinery Co., Ltd
Ex.1. Inspection to the lever hoist, Ex.2. Inspection to the full lifting systemjtAHenan Dongqi Machinery Co., Ltd

Example 2: Inspection to the full lifting systemjtAHenan Dongqi Machinery Co., Ltd

Ex.2. is a diagram of all the standards that can affect a single lifting system. Depending on whether you’re an operator or inspector, there are specific parts of these regulations you need to know detail. When in doubt, always check with the equipment manufacturer.jtAHenan Dongqi Machinery Co., Ltd

Hoist safety and hoist inspection: Hoist Frequent inspection and Periodic hoist Inspections

Frequent Inspections and Periodic Inspections are the two classes of hoist inspections to ensure your hoist safety.jtAHenan Dongqi Machinery Co., Ltd

Frequent Hoist Inspections

Frequent Hoist Inspections are what Pre-Operational Inspections are. Frequent hoist inspections are conducted between the Periodic Inspections The frequent hoist inspections is not required to be recorded, which is commended to be conducted at the start of every shift to ensure safe working order of the hoist. Frequent inspections enable you to detect if anything is wrong with the hoist before lifting a load.jtAHenan Dongqi Machinery Co., Ltd

Periodic Hoist Inspections

Periodic Inspections are thorough, detailed hoist inspections, which requires complete disassembly of the hoist.jtAHenan Dongqi Machinery Co., Ltd

The periodic hoist inspections are conducted based on the hoist service duty (how often the hoist is used) and hoist application environment. The periodical hoist inspection is required by OSHA, ASME and the hoist manufacturers, which needs to be recorded well to keep on file to ensure your hoisting equipment is safe to use.jtAHenan Dongqi Machinery Co., Ltd

How to determine the inspection schedule?

Usually, the hoisting equipment have to be inspected according the service duty, shown in the following table:jtAHenan Dongqi Machinery Co., Ltd

Hoist inspection schedulejtAHenan Dongqi Machinery Co., Ltd
jtAHenan Dongqi Machinery Co., Ltd
If you find a lot of issues with an electric hoist during a Periodic Inspection:jtAHenan Dongqi Machinery Co., Ltd

  • The number of inspections can be increased each year.
  • The hoist operators should be trained to make sure the hoist operation is correct for the electric hoists should not be damaged if they has been used properly. While inspection records don’t need to be maintained for Frequent (Pre-Operational) Inspections, a pre-operational checklist can serve as a quick reference when conducting these inspections.
  • contact us for more information on frequent hoist inspection and periodic hoist inspection.

Hoist safety and hoist inspection:Markings and Labels

  • Markings and labels are the places where your hoist needs to check firstly.
  • Lock-out tag or label is usually used during the hoist repair and maintenance.
  • Tag or plate with hoist identification and capacity information should be checked
  • Warning labels on the hoist should be checked which be kept on the hoist all the time.

Hoist safety and hoist inspection:Controls

Hoist controls is critical to be checked before the hoist operation. If a hoist control is not properly labeled or is not working correctly, injury might occur and damages to the loads might happen. The hoist control should be inspected in two aspects, one is the hoist overall condition the control is in, including clear markings and labels and the second is whether or not the hoist control functions properly. Read on the details on the hoist inspection on controls.jtAHenan Dongqi Machinery Co., Ltd

Hoist controljtAHenan Dongqi Machinery Co., Ltd

Hoist safety and hoist inspection:ASME B30.10 Hook Inspection

ASME B30.10 covers hook inspection for all hoists, cranes and rigging hooks. Hook inspection is required to ensure safety and to detect defects before operations. When inspecting the hook, there are a few key things to look for:jtAHenan Dongqi Machinery Co., Ltd

 DeformationjtAHenan Dongqi Machinery Co., Ltd

  • Deformation is an indication of overloading, side loading or using improper rigging techniques.

Wear CorrosionjtAHenan Dongqi Machinery Co., Ltd

  • The hook should be out of services if there is any wear exceeding 10% of the original section dimension of the hook or its load pin.

Nicks and GougesjtAHenan Dongqi Machinery Co., Ltd

  • Easy way to check nicks and gauges: The nick or gouge that you can fit your finger nail into is cause to replace the hook.

 LatchesjtAHenan Dongqi Machinery Co., Ltd

  • Hook latches hold the rigging in the hook when in slack position. The latches should be inspected to ensure that the latch bridges the throat of the hook when in the closed position and that it operates properly.

Bolts & PinsjtAHenan Dongqi Machinery Co., Ltd

  • All bolts and pins in the hook should be make they are secure.

MarkingsjtAHenan Dongqi Machinery Co., Ltd

  • Look for proper hook markings, including the manufacturer’s logo.

Field modificationsjtAHenan Dongqi Machinery Co., Ltd

  • The place of hook modifications should be inspected. If you have a modified hook, the modification field should be conducted by an experienced manufacturer

Hoist safety and hoist inspection:Chain Inspection

Chain inspection is the final step of hoist inspection. The main procedures of the chain inspection mainly goes in this way:jtAHenan Dongqi Machinery Co., Ltd

  • Clean the chain before inspection to enable the all the damages can be observed. Checking the entire length of chain of the electric hoist will be part of a Periodic Inspection.
  •  Through inspection of the chain. When conducting the hoist chain inspection, you should look for Inner link wear, gouges, nicks and twists, Chemical damage or corrosion, Stretch, etc.
  • Finally, check for proper lubrication. 

Hoist inspection: Chain inspectionjtAHenan Dongqi Machinery Co., Ltd

Hoist safety and hoist inspection:Operation Inspection

After taking these precautions, the hoist’s upper and lower limits can be tested according to the following procedures:jtAHenan Dongqi Machinery Co., Ltd

  • With no load on the electric hoist, start running up the electric hoist.
  • Listen for abnormal noises.
  • The limit switch should stop the electric hoist prior to the hook block hitting the hoist. If it fails to operate, or you think it will fail, do not run into the bottom of the electric hoist. This can damage the electric hoist.
  • If the limit switch fails, the electric hoist needs to be removed from duty.

Next, lower the electric hoist hook to test the operation of the lower limit switch.jtAHenan Dongqi Machinery Co., Ltd

Follow the same steps you took when testing the upper limit switch of your electric hoist. As it is lowering, listen for unusual sounds to inspect your hoist Check the chain or wire rope of the electric hoist for defects.jtAHenan Dongqi Machinery Co., Ltd
Again, if the limit switch fails, remove the electric hoist from service.jtAHenan Dongqi Machinery Co., Ltd

Testing your electric hoist’s upper and lower limits is a vital part of your electric hoist pre-operational inspection to ensure your hoist safety. Whenever you have questions about the functioning of the limit switch on your electric hoist or think there is an issue, take the electric hoist out of work and contact the electric hoist manufacturer. Hoist safety always ranks the top.jtAHenan Dongqi Machinery Co., Ltd

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