BTC - Scope of Services - page 1

and change in diameter over load. Undertake post
break strip down of sample to determine failure
modes (shear/ductile) within sample. Conduct
tests with third party witness. In house breaking
capacity up to 800 tonnes.
The multilayer rope spooling test machine (MLS)
simulates rope deterioration (crushing and cross
over damage) that is typically seen on winch drums
spooling at high speeds with several layers of rope
on the drum. Fitted with ‘Lebus’ grooves the
MLS machine can spool ‘on’ and ‘off’ up to several
layers of rope at a maximum of 32 tonnes of rope
load in varying vertical and horizontal fleet angle
BTC has two torque/turn machines capable
of simulating rope torque and rotational
characteristics under load with a maximum axial
load capacity of 150 tonnes the machines can
capture generated torque/turn data against load
and can also induce turn/torque into the rope.
BTC is equipped with four bend fatigue machines
which can repeatedly cycle rope around a sheave
(pulley) to either a selected rope discard criteria or
to complete failure. The machine is used to evaluate
products against each other or in cases to quantify
residual fatigue life left in rope after service. The
machine typically uses 20:1 bend ratios and can test
ropes up to 100 mm in diameter at maximum loads
up to 160 tonnes. Additionally one of our machines
can simulate cyclic loading and reverse bend
fatigue cycle.
Non destructive examination using (NDE) magnetic
resonance test (MRT) to generate trace reports
Condition assessment on ropes via visual
examination of lubrication, corrosion, mode of wire
breaks and general wear and tear, both externally and
internally. Geometrical measurements of rope
diameter and lay length.
Mechanical tests on wire sample taken from the rope
to evaluate strength, ductility and compare residual
wire properties against ‘as manufactured’ values.
Calculated residual aggregate breaking strength
of the rope from wire strengths.
Corrosion assessment to establish residual
galvanised zinc coating remaining on wires.
Determine zinc coat weight followed by detailed
metallurgical examination of wire cross sections to
evaluate extent of corrosion into structure.
Metallurgical assessment of wire condition including
detailed visual examination of the wire surface,
fracture face and steel microstructure to determine
the cause of damage.
Chemical analysis to determine carbon/sulphur
content or full elemental split down to determine
quality/grade of steel used in rope manufacture.
Destruction tests to establish residual breaking
strength of both steel and fibre ropes. Generate
rope breaking load curve, measure rope modulus
Forensic Analysis
Mechanical Testing
Bridon Technology Centre
Carr Hill, Doncaster DN4 8DG, UK
+44 (0)1302 38 2348
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