Business Management Systems
TOTAL FINA ELF TSP - PRODUCTION
TOTAL SOUTH PARS / TSP-P-PR-HSE-SAF-235 SOP: LIGHT LIFTINGTSP–P / PR–HSE–SAF–235 / Rev 1 / 02/08/2001
OFFSHORE SAFE OPERATING PROCEDURES LIGHT LIFTING OPERATIONS
Object:
The purpose of this Safe Operating Procedure (SOP) is to describe the type of equipment that is available for Light Lifting Operations and the circumstances under which it should be used. This SOP also provides information, where necessary, to ensure safe and effective use of Light Lifting Equipment. This Document has been prepared in compliance with the Production HSE Management Plan and the guidelines in the HSE Manual (Rev. 0 January 2000) and in accordance with the 900 Series of Standards (Lifting and Handling).
Distribution:
Manuals to: As per controlled distribution list
Original to : Production Documentation Officer / EDMS
Reason for revision:
Issued as a Working Document
Authorisation Record
ORIGINATOR / TECHNICAL AUTHORITY / ISSUING AUTHORITYSignature / Signature / Signature
POSITION / head of hse / POSITION / Head of maintenance / POSITION / operations asst. Phases 2 & 3
NAME / w. greenhow / W S / NAME / j.r.cuny / j.leroy / NAME / m. ling / M.DEVOOGHT
DATE / 2 august 2001 / DATE / 2 august 2001 / DATE / 2 august 2001
TSP–P–PR–HSE–SAF–235
LIGHT LIFTING OPERATIONS
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CONTENTS
Page
1.0 PURPOSE 3
2.0 RESPONSIBLE PERSONS 3
2.1 Field Supervisors/Technicians 3
2.2 Safety Officer and Safety/Environment Engineer 3
2.3 Inspection Engineer 3
3.0 PROCEDURES 3
3.1 Inspection and Testing 3
3.2 Wire Rope Lifting Blocks 3
3.3 Pulley Blocks with Fibre Ropes 4
3.4 Gin Wheels 4
3.5 Jacks 4
3.6 General Lifting Information 4
Figure 1 : Slings (General) 5
CROSS REFERENCES 5
CHECK LIST 6
1.0 PURPOSE
To ensure that all operations performed with light lifting equipment are performed in a safe and efficient manner.
2.0 RESPONSIBLE PERSONS
2.1 Field Supervisors/Technicians
All Field Supervisors/Technicians are required to ensure that all operations using light lifting gear are performed in accordance with this Procedure.
2.2 Safety Officer and Safety/Environment Engineer
The Safety Officer and Safety/Environment Engineer are responsible for monitoring safe working practices on site.
2.3 Inspection Engineer
The Inspection Engineer is responsible for ensuring that all light lifting gear is examined and tested in accordance with this Procedure.
3.0 PROCEDURES
The incorrect use of light lifting equipment can be hazardous. This is because light lifting equipment is sometimes not subjected to the same rigorous inspection schedules as heavier lifting equipment such as cranes, etc. However the same basic principles must apply:
– The SWL of the equipment should always be known.
– All light lifting gear must be thoroughly examined and tested. All tests and examinations must be properly documented.
– All equipment should have the appropriate colour coding.
– Only trained and competent persons should be in charge of a lifting operation.
3.1 Inspection and Testing
All equipment used in light lifting operations whether fixed or portable must be inspected and/or tested to confirm that it is fit for its intended use. A colour coding system is used to ensure that all equipment in use has been either inspected or tested. The colour code is changed every six months. No equipment other than those bearing the valid colour displayed is allowed to be used in lifting operations.
3.2 Wire Rope Lifting Blocks
These are normally small electrically powered winch-drums arranged for overhead suspension, often on a travelling carriage. The following conditions apply:
– The supporting beam must be properly designed by a competent person.
– The Identification number and Safe Working Load (SWL) must be recorded on the blocks.
– Only the correct wire rope, in accordance with the manufacturers’ instructions, should be used.
– The wire rope must be installed and laid on the drum smoothly and under tension.
– If the wire rope becomes crossed on the drum it is to be immediately paid off and re-laid.
– The wire rope and block should be inspected weekly and a record kept.
– The wire rope should be discarded if the visible number of broken wires in any length of ten diameters exceeds 5% of the total number of wires.
– The operator should be trained in the use of powered wire rope lifting blocks.
3.3 Pulley Blocks with Fibre Ropes
The reeving of multiple fall blocks using fibre ropes is an accepted part of a trained rigger's role. See also 3.5 below. The following conditions apply:
– The SWL is not normally marked on fibre ropes. Information should be available on site concerning the SWL relating to various sizes and types of fibre ropes.
– Fibre rope terminations should be performed by a skilled person. Any knots should be frequently checked.
– Anchor points should be checked by an Inspection Engineer in advance.
– Due allowance should be made for impact / snatch loads.
– Hooks used on fibre ropes or on fibre rope return blocks should be fitted with a safety catch. Bent pieces of wire are not acceptable. Hooks should be properly spliced onto rope.
3.4 Gin Wheels
Gin wheels, often known as jenny wheels may be used on site. Often they are set up by an operator rather than a trained rigger. It should be noted that in a single fall, the holding point will be subject to a load of twice the lifting load plus approximately 8% (an allowance for friction in the gin wheel). See also 3.5 below. The following conditions apply:
– All anchor points should be checked by a competent person.
– All hooks should be properly made and fitted with a safety latch.
3.5 Jacks
Jacks are extremely powerful but can operate usually over only very short distances. The following conditions apply:
– The SWL is to be clearly marked on the jack.
– All jacks must have a positive stop to prevent over travel.
– Jacks should be well supported and if necessary the load should be properly distributed into the foundations etc.
– If the jack head could slip, a wood block can be used between the jack and the load.
– Once the jack has travelled some distance, suitable packing material should be inserted to prevent the load falling in case of failure of the jack.
– The load must never remain supported on the jack(s). Packing material must be used.
3.6 General Lifting Information (see Figure 1)
It is important to understand the principle of load transfer when using pulleys or multi-rope systems.
Under static conditions, the tensions in each part of the rope or fall will be the total load divided by the number of falls. (A fall is the rope between two pulleys.)
Under operations the tension in each fall increases due to friction at each sheave or pulley. The friction increase depends upon the sheave diameter and the type of bearing. A figure of 8% can be taken. Therefore the following can be calculated for the maximum tension in the rope:
Friction per sheave / Number of falls supporting the load W1 / 2 / 3 / 4 / 5 / 6
8% / 1.08W / 0.56W / 0.39W / 0.30W / 0.25W / 0.22W
Figure 1 below gives the maximum load in the rope and the load on the support when lifting a load W with a friction figure of 8%.
FIGURE 1
CROSS REFERENCES
SOP: PR-HSE-SAF-233 Lifting Gear & Material Handling
SOP: PR-HSE-SAF-231 Offshore Crane Operations
check list
Below are some items which must be checked when considering light lifting equipment
No. / Description / Yes / No / N/A / Comments1 / For multiple systems tackle, are personnel aware of the SWL ?
2 / Is all equipment registered and inspected in accordance with Inspection Procedures?
3 / Is the SWL marked adequately on all equipment ?
4 / Is the colour code correct ?
5 / Is the operator trained and competent ?
6 / Are chain blocks clear & free from dirt ? Are they properly lubricated ?
7 / Have all anchoring points been properly assessed?
8 / Are any jacks being correctly used ?
REV. 1 2nd August 2001 PAGE : 1 of 6