BS EN 1554:2012 pdf download

BS EN 1554:2012 pdf download.Conveyor belts一Drum friction testing.
6.2.3 Method A – Tests in still air
6.2.3.1 General
Conduct the procedures In 6.2.3.2 016.2.3.3, as specified in the Product or safety specification, Conduct two tests with the carrying side of the belt in contact with the steel drum (4.1) and two tests with the reverse side of the belt in contact with the steel drum.
6.2.3.2 Method Al -Test in still air with fixed end load
Pass the test piece through an c of 180 around the steel drum ensuring the belt is in contact with the drum throughout the 180 . Ensure that one end is rigly secured and the other end attached to the tensioning system as shown in Figure 1. Apply a force of 343 N.
Rotate the drum at (200 ± 5) rpm in a direction away from the rigidly secured end of the test piece (i.e. silar to the forward direction of a conveyor drive). Maintain the force of 343 N for 60 mm or until the test piece breaks.
Record the maximum surface temperature of the drum during the test
Examme the test piece for any flame or glowing during and after the test.
If after 60 mm the belt is unbroken, remove the bell from the drum and examine in subdued light the surface of
the belt which has been in contact with the drum, for any sign of glow.
6.2,3.3 Method A2 -Test In still air with increasing end load
Pass the test piece through an arc of 180 • around the steel drum ensuring that the belt is in contact with the drum throuiout the 180 . Ensure that one end is rigidly secured and the other end attached to the tensioning system as shown in Figure 1. Apply a force of 343 N.
Rotate the drum at (200 ± 5) rpm in a direction away from the rigidly secured end of the test piece (i.e. 5wmlar to the forward direction of a conveyor drive). Maintain the force of 343 N until the test piece breaks. If the test piece has not broken after 60 mm on test, increase the force as follows whilst the drum i5 Still rotating at (200± 5) rpm:
a) lncreasetheforceby343Nto686Nforafurther3om.n;
b) If the test piece has stil not broken, increase the force by a further 343 N to 1029 N for a further 30 mm, or until the test piece breaks;
C) It the test piece has stil not broken, increase the force by a further 343 N to 1372 N for a further 10 mm, or until the test piece breaks;
d) If the test piece has still not broken, increase the force by a further 343 N to 1715 N. the test being continued at 1 715 N until a total time of 150 mm has elapsed from commencement of the test, or until the test piece breaks.
Record the maximum surface temperature of the drum during the lest.
Examine the test piece for any flame or glowing during and after the test.
If after 150 mm the belt is unbroken, remove the belt from the drum and examine in subdued light the surface of the belt which has been in contact with the drum, for any sign of glow.
6.2.4 Method B – Tests in moving air
6.2.4.1 General
Conduct the procedures In 62.42 or 6.2.4.3, as specified in the product or safety specification. Conduct two tests with the carryng side of the belt in contact with the steel drum (41) and two tests with the reverse side of the belt in contact with the steel drum,
6.2.4.2 Method Bi – Tests In moving air with fixed end load
Repeat the procedure in 6.2.3.2 in an air current having a velocity of (2.0 i 0.1) mis at a temperature of not less than 5 t (see 4.4).
Examine the test piece for any flame or glowing during the test. If the test piece has broken, leave the two pieces within the influence of the air current (see 4.4) until either flame or glowing occiss, or until it is dear that neither is possible. Terminate the test at this point.
If after 60 mm the belt is unbroken, remove the belt from the drum and examine. in subdued bght, the surface of the belt which has been in contact with the drum, for any sign of glow.
6.2.4.3 Method B2 – Tests In moving air with Increasing end load
Repeat the procedure in 6.2.3.3 in an air current having a veloc*y of (2.0 i 0.1) mis at a temperature of not less than 5 C (see 4,4).