POWERTEX Round sling, Webbing Sling Instructions For Use Manual
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POWERTEX Round Slings / Webbing Slings
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UMPRS/PWE/PWS
20180830LT
GB Instruconforuse
LT Naudojimoinstrukcija
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POWERTEX Roundslings and Webbing Slings
Instruction for use (GB) (Original instructions)
WARNING
• Failure to follow the regulations of this instruction for use may cause
serious consequences such as risk of injury.
• Read and understand these instructions before use.
1 Use of roundslings and webbing slings (sling) in adverse conditions or hazardous applications
1.1 The material from which slings are manufactured has selective
resistance to chemicals. Polyester (PES) is resistant to most mineral
acids but is damaged by alkalis;
Solutions of acids or alkalis which are harmless can become suciently concentrated by evaporation to cause damage. Contaminated slings
should be taken out of service at once, soaked in cold water, dried
naturally and referred to a competent person for examination.
Slings with grade 8 ttings and multi-leg slings with grade 8 master
links should not be used in acidic conditions. Contact with acids or
acidic fumes causes hydrogen embrittlement to grade 8 materials.
If exposure to chemicals is likely, the manufacturer or supplier should
be consulted.
1.2 Slings are suitable for use and storage in the following temperature
ranges:
a) polyester: -40°C to 100°C.
At low temperatures ice formation will take place if moisture is present.
This may act as a cutting agent and an abrasive causing internal
damage to the sling. Further, ice will lessen the exibility of the sling, in
extreme cases rendering it unserviceable for use.
These ranges vary in a chemical environment, in which case the advice of the manufacturer or supplier should be sought.
Limited indirect ambient heating, within these ranges, is acceptable for
drying.
1.3 The man-made bres from which the slings is produced are sus-
ceptible to degradation if exposed to ultra-violet radiation.
Slings should not be stored in direct sunlight or sources of ultra-violet
radiation.
2 Inspection of roundslings and webbing slings in service
2.1 Before rst use of the sling it should be ensured that:
a) the sling corresponds precisely to that specied on the order;
b) the manufacturer’s certicate is to hand;
c) the identication and WLL marked on the sling correspond with the
information on the certicate.
2.2 Before each use, the sling should be inspected for defects and to
ensure that the identication and specication are correct. A sling that
is unidentied or defective should never be used, but should be refer-
red to a competent person for examination.
EC-Declaration is available.
2.3 During the period of use, frequent checks should be made for
defects or damage, including damage concealed by soiling, which
might aect the continued safe use of the sling. These checks should
extend to any ttings and lifting accessories used in association with
the sling. If any doubt exists as to the tness for use, or if any of the
required markings have been lost or become illegible, the sling should
be removed from service for examination by a competent person.
Any damage evident in the cover (roundsling) indicates potential damage to the loadbearing core.
The following are examples of defects or damage likely to aect the
tness of slings for continued safe use:
a) Surface chafe. In normal use, some chang will occur to the surface
bres of the cover (roundsling). This is normal and has little eect. Any
substantial chafe, particularly localized, should be viewed critically.
Local abrasion, as distinct from general wear, can be caused by sharp
edges whilst the sling is under tension,
and can lead to the cover (roundsling) becoming cut, or/and cause
serious loss of strength.
b) Roundsling: Cuts. Cross or longitudinal cuts in the cover, or any
damage to the stitching, raise serious doubts as to the integrity of the
core. Webbing sling: Cross or longitudinal cuts, cuts or chafe damage
to selvedges, cuts to stitching or eyes.
c) Exposed core (roundsling).
d) Chemical attack. Chemical attack results in local weakening and
softening of the material. This is indicated by aking of the cover/surface which may be plucked or rubbed o. Any signs of chemical attack
to the cover (roundsling) raise serious doubts as to the integrity of the
core (roundsling).
e) Heat or friction damage. This is indicated by the bres of the cover/
surface material taking on a glazed appearance and in extreme cases,
fusion of the bres can occur, indicating a weakening of the core
(roundsling).
f) Damaged or deformed ttings.
3 Correct selection and use of roundslings and webbing slings
(slings)
3.1 When selecting and specifying slings, consideration should be
given to the required working load limit, taking into account the mode of
use and the nature of the load to be lifted. The size, shape and weight
of the load, together with the intended method of use, working environ-
ment and nature of the load, all aect the correct selection.
The selected sling should be both strong enough and of the correct
length for the mode of use. If more than one sling is used to lift a load,
these slings should be identical. The material from which the slings is
made should not be aected adversely by the environment or the load.
Consideration should also be given to ancillary ttings and lifting de-
vices which should be compatible with the sling(s).
Webbing slings: The termination of the sling should also be considered
i.e. whether ttings or soft eyes are required.
3.2
Webbing slings: When using slings with soft eyes, the minimum
eye length for a sling for use with a hook should be not less than 3,5
times the maximum thickness of the hook and in any event the angle
formed in the eye of the sling should not exceed 20°.
When connecting a sling with soft eyes to a lifting appliance, the part
of the lifting appliance which bears on the sling should be essentially
straight, unless the bearing width of the sling is not more than 75 mm
in which case the radius of curvature of the lifting appliance attachment
should be at least 0,75 times the bearing width of the sling.
Figure D1 illustrates the problem of accommodating
webbing on a hook of radius less than 0,75 times the
bearing width of the sling.
Wide webbings may be aected by the radius of the
inside of the hook as a result of the curvature of the
hook preventing uniform loading across the width of the
webbing.
Figure D1 inadequate accommodation of a webbing
eye on a hook of too small radius
3.3 Slings should not be overloaded: the correct mode factor should be
used (see table 1).
Angle of
inclination
1-leg
U-lift Laced 1-leg angle 2-leg sling 3-, 4-leg sling
0°- 45° 45°- 60° 0°- 45° 45°- 60°0°- 45°45°- 60°
Load factor 1 2 0,8 1,4 1 1,4 1 2,1 1,5
Colour WLL ton
Lila 1,0 2,0 0,8 1,4 1,0 1,4 1,0 2,1 1,5
Green 2,0 4,0 1,6 2,8 2,0 2,8 2,0 4,2 3,0
Yellow 3,0 6,0 2,4 4,2 3,0 4,2 3,0 6,3 4,5
Grey 4,0 8,0 3,2 5,6 4,0 5,6 4,0 8,4 6,0
Red 5,0 10,0 4,0 7,0 5,0 7,0 5,0 10,5 7,5
Brown 6,0 12,0 4,8 8,4 6,0 8,4 6,0 12,6 9,0
Blue 8,0 16,0 6,4 11,2 8,0 11,2 8,0 16,8 12,0
Orange 10,0 20,0 8,0 14,0 10,0 14,0 10,0 21,0 15,0
Figure D1
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Working load limits for some modes may be given on the label. In the
case of multi-leg slings the maximum angle to the vertical should not
be exceeded.
3.4 Good slinging practices should be followed: the slinging, lifting and
lowering operations should be planned before commencing the lift.
3.5 Slings be should correctly positioned and attached to the load in a
safe manner. Slings should be placed on the load such that they are
able to adopt the attened form and the loading is uniform across
their width. They should never be knotted or twisted.
Damage to labels should be prevented by keeping them away from the
load, the hook and the angle of choke.
3.6 In the case of multi-leg slings, the WLL values have been determined on the basis that the loading of the sling assembly is symmetrical.
This means that when a load is lifted the sling legs are symmetrically
disposed in plan and subtended at the same angle to the vertical.
In the case of 3 leg slings, if the legs are not symmetrically disposed in
plan the greatest tension is in the leg where the sum of the plan angles
to the adjacent legs is greatest. The same eect occurs in 4 leg slings
except that the rigidity of the load should also be taken into account.
NOTE With a rigid load the majority of the weight may be
taken by only three, or even two, of the legs, with the
remaining legs only serving to balance the load.
3.7 Slings should be protected from edges, friction and abrasion,
whether from the load or the lifting appliance. Where protection against
damage from edges and/or abrasion is supplied as part of the sling,
this should be correctly positioned. It may be necessary to supplement
this with additional protection.
Denition of a sharp edge:
Radius r (edge) < thickness d of the
lifting gear.
3.8 The load should be secured by the sling(s) in such a manner that it
cannot topple or fall out of the sling(s) during the lift. Sling(s) should be
arranged so that the point of lift is directly above the centre of gravity
and the load is balanced and stable. Movement of the sling over the
lifting point is possible if the centre of gravity of the load is not below
the lifting point.
When using basket hitch, the load should be secure since there is no
gripping action as with choke hitch and the sling can roll through the
lifting point. For slings which are used in pairs, the use of a spreader is
recommended so that the sling legs hang as vertically as possible and
to ensure that the load is equally divided between the legs.
When a sling is used in choke hitch, it should be positioned so as to
allow the natural (120°) angle to form and avoid heat being generated
by friction. A sling should never be forced into position nor an attempt
made to tighten the bite. The correct method of securing a load in a
double choke hitch is illustrated in gure 3.A (roundsling) and 3.B (webbing slings) double choke hitch provides greater security and helps to
prevent the load sliding through the sling.
Figure 3.A Figure 3.B
3.9 Care should be taken to ensure the safety of personnel during the
lift. Persons in the danger area should be warned that the operation is
to take place and, if necessary, evacuated from the immediate area.
Hands and other parts of the body should be kept away from the sling
to prevent injury as the slack is taken up.
The work with lifting devices and equipment’s must be planned, organized and executed in order to prevent hazardous situations.
In accordance with national statutory regulations lifting devices and
equipment’s must only be used by someone well familiar with the work
and having theoretical and practical knowledge of safe use.
Apart from the instruction manual we refer to existing national regulations on each work place.
3.10 A trial lift should be made. The slack should be taken up until the
sling is taut. The load should be raised slightly and a check made that
it is secure and assumes the position intended. This is especially
important with basket or other loose hitches where friction retains the
load.
If the load tends to tilt, it should be lowered and attachments re-positioned. The trial lift should be repeated until the stability of the load is
ensured.
3.11 Care should be taken when making the lift to ensure that the load
is controlled, e.g. to prevent accidental rotation or collision with other
objects.
Snatch or shock loading should be avoided as this will increase the
forces acting on the sling.
A load in the sling or the sling itself should not be dragged over the
ground or rough surfaces.
3.12 The load should be lowered in an equally controlled manner as
when lifted.
Trapping the sling when lowering the load should be avoided. The load
should not rest on the sling, if this could cause damage and pulling the
sling from beneath the load when the load is resting on it should not be
attempted.
3.13 On completion of the lifting operation the sling should be returned
to proper storage.
When not in use, slings should be stored in clean, dry and well ventilated conditions, at ambient temperature and on a rack, away from
any heat sources, contact with chemicals, fumes, corrodible surfaces,
direct sunlight or other sources of ultra-violet radiation.
3.14 Prior to placing in storage, slings should be inspected for any
damage which may have occurred during use. Slings should never be
returned damaged to storage.
3.15 Where lifting slings have come into contact with acids and/or alkalis, dilution with water or neutralization with suitable media is recommended prior to storage.
Depending on the material of the lifting sling and on the chemicals referred to in 1, 1.1, it may be necessary in some cases to request from
the supplier additional recommendations on the cleaning procedure to
be followed after the sling has been used in the presence of chemicals.
3.16 Slings which have become wet in use, or as the result of cleaning,
should be hung up and allowed to dry naturally, not near a heat source.
4 Examination and repair
Examination periods should be determined by a competent person,
taking into account the application, environment, frequency of use and
similar matters, but in any event, slings should be visually examined at
least annually by a competent person to establish their tness for
continued use.
Records of such examinations should be maintained.
Damaged slings should be withdrawn from service. Never attempt to
carry out repairs to the slings yourself.
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