BS EN 892:2012 pdf free

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BS EN 892:2012 pdf free.Mountaineering equipment – Dynamic mountaineering ropes – Safety requirements and test methods.
BS EN 892 Dry the test samples for at least 24 h in an atmosphere of (50士5) °C and less than 20 % relative humidity. Then condition these test samples in an atmosphere of (23土2) °C and (50土2) % relative humidity for at least 72 h. Then start testing these samples at a temperature of (23土5)。C within 10 min.5.3 Construction, diameter, and mass per unit length 5.3.1 Procedure Clamp the test sample at one end.Load the test sample without shock with a mass1) of:一(10 t 0,1) kg for single ropes,一(6土 0,1) kg for half ropes,-一(5土0,1)kgfortwinropes
at a distance of at least 1 200 mm from the clamp.After applying the load for 60 s mark within the next 10s a reference length of (1 000土1) mm on the testsample. The distance of the marking from the clamp or attachment for the test sample shall be at least 50 mm.Within a further 3 min measure the diameter in two directions around the diameter starting at points 90° apart at each of three levels approximately 100 mm apart. If the rope cross section is not circular, the maximum and minimum diameter are to be determined in each section. The length of the contact areas of the measuring instrument shall be (50土1) mm. The rope cross-sectional area shall not be subject to any compression during the measurement.Then cut out the marked portion of the test sample and detrmine the mass to the nearest 0,1 g.Check that the construction of the rope is a kernmantel construction.The rope is drawn through the apparatus ilustrated in Figure 4, where the movement is restricted by radial forces. The resulting frictional force on the sheath causes slippage of the sheath relative to the core. The extent of this slippage is measured.Fuse one end of the sheath and core of each test sample together. Before cutting the other end of each test sample to size, apply a short length of adhesive tape around the rope, where it is to be cut, at right angles to the axis of the rope. The adhesive tape shall be at least 12 mm wide before cutting, and the angle of wrap around the rope, 0, shall be 150°≤θ≤180°. After affixing the adhesive tape, cut the sample to a length of (2 250土10) mm with a sharp knife, within the width of the tape, at right angles to the axis of the rope (see Figure 5) such that the adhesive tape remaining on the test sample has a width of (10 土5) mm. The characteristics of the adhesive tape and the method of application should be such as to reduce the extent to
which the cut end of the sheath unravels during the test, whilst not interfering with the slippage taking place between the core and the sheath of the rope sample.BS EN 892 pdf download.

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