BS EN 919:1995 Fibre ropes for general service. Determination of certain physical and mechanical properties
Withdrawn
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1.1 This European Standard specifies, for ropes of different kinds, a method of determining each of the following characteristics:
- net mass per metre;
- lay length;
- plait pitch;
- elongation;
- tensile strength.
1.2 The first three characteristics (net mass per metre, lay length and plait pitch) are measured with the rope under a specified tension called the reference tension.
NOTE. Knowledge of the net mass per metre, measured in accordance with this European Standard, also makes it possible to calculate the net length (under reference tension) of a rope by dividing the total net mass of the rope (without lashings or packing material) by the mass per metre, both of these masses being measured after the same conditioning.
1.3 The fourth characteristic (elongation) corresponds to the measured increase in length of the rope when the tension to which it is subjected is increased from an initial value (reference tension) to a value equal to 75 % of the minimum specified breaking strength of the rope.
1.4 The fifth characteristic (tensile strength) is the maximum load registered (or reached) during a breaking test on the test piece, carried out on a tensile testing machine with constant rate of traverse of the moving element. The breaking strength values given in the tables of rope specifications are only valid when this type of testing machine is used.
NOTE. When it is not possible to test the whole section of rope, the method described in annex B can be used, subject to agreement between the parties involved.
