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By Hook or by Crooks

- Tuesday, October 03, 2017

WARNING: The following case study information is from our inspection and testing services available through Shaw lifting. The information provided below is to raise the issues of using inferior products in critical offshore processors. This is what we have seen when we inspected some ROV Hooks for the offshore industry in 2017. The inspection was performed by our senior engineers.

The following example shows how Shaw’s quality standards mean that you save time and potential regulatory issues going forward.

The inspection engineers have seen this and other issues on several occasions on several vessels and if this equipment was to be used especially underwater the time and ability to perform the tasks would be seriously diminished.

Please refer to picture 1 & 2. Produced by another lifting company.

The pictures show an ROV Hook which has had a pulling cable attached. (Please note that this has been threaded through the eyes on the side of the Hook and attached to the safety catch, however, with two loose ends. Then an aluminium ferrule has been placed over the ends, flattened to hold the loose ends in place, (we assume with a hammer). This is an incorrect method of ferrule securing of wire rope and is not industry best practice.

It also appears that engineering rope was not used (as recommended) but a plastic coated, what looks to be more like a washing line, than an industrial wire rope. It is Shaw’s opinion that this process is incorrect and does not follow best practices for use within the working environment.

Shaw recommends:

Please see picture 3 & 4. Available through Shaw Lifting Ltd.

Pictures 3 and 4 are ROV Hooks produced by Shaw with the correct Pulling Wire. We use an Engineering Rope to BS EN 1238 with a minimum breaking load on a single part of 552 KG. (In fact, the way it is fitted would increase to around double.)

The Wire Rope is threaded through the eyes on the side of the Hook and the safety catch. We then thread the Wire Rope through reinforced PVC Tubing.

The two ends of the Wire Rope are then joined together with a ferrule secured termination. This is done via a Hydraulic Wire Rope press, which is the correct way to secure a wire rope with a ferrule.

At Shaw, we have invested in the right machinery to carry out this type of work for over 30 years!

The ferrule begins out as an oval shape but when placed into the press in the correct swages it is pressed into a cylindrical shape with the wire rope embedded on the inside of the ferrule.

We then pushed the PVC tubing over the finished ferrule termination. The PVC Tubing helps to protect the wire when used in the following circumstances:

  • If being used by hand because of the circumference it does not dig into the operator’s hand
  • If being used remotely it will protect the wire from being cut or damaged

With Shaw Lifting accredited to ISO 9001:2015through Lloyds, we believe that by choosing Shaw first, you get the professional’s supplying the right equipment to the necessary standards first time, all the time.

For further enquires and information for all your lifting solutions please contact our sales line 01642 455 920.

Fig 1

ROV Hook

Fig 2

ROV Hook Fig 2

Fig 3

Shaw Lifting ROV Hook

Fig 4

Shaw Lifting ROV Hook Fig 2

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