BS 8618-2015 pdf free download

BS 8618-2015 pdf free download.Granular carbon dioxide (C02) absorbent material for life support, diving, hyper- and hypobaric applications — Specification.
Weigh and r&ord each of the sieves and the receiving pan indicated in Table 4. Assemble the nest of clean dry sieves indicated in Table 4 in order of aperture size with the receiver pan at the base.
5.3.4 Procedure
Distribute (100 ±0.1) g of absorbent onto the top sieve. Record the amount of absorbent used. Attach the lid and shake the assembled sieves for S mm. on a mechanical shaker.
Remove the nest of sieves from the shaker and weigh the amount of material retained on each sieve, and the dust passing into the receiver at the base of the nest. Any granules lodged in the meshes of a sieve shall be included as the material retained on the sieve.
5.3.5 Expression of results
Report the mass of material on each sieve, and the dust in the receiver, as a percentage of the total mass of absorbent retained in the nest of sieves.
5.4 Friability
5.4.1 Principle
To determine the change in size distribution of the granular material following an extended period of vibration on a nest of standard sieves.
5.4.2 Apparatus
5.4.2.1 sieves, clean, dry (see Table 4)
5.4.2.2 mechanical sieve shaker, of known frequency and amplitude
5.4.3 Preparation and preservation of test samples and test pieces
Perform a visual inspection of the sieves shown in Table 4. in accordance with BS ISO 3310-1, 5.2, Test 1.
Weigh and record each of the sieves and the receiving pan indicated in Table 4. Assemble the nest of clean dry sieves indicated in Table 4 in order of aperture size with the receiver pan at the base.
5.4.4 Procedure
Distribute (100 ±0.1) g of absorbent on the top sieve. Record the amount of absorbent used. Attach the lid and shake the assembled sieves for 60 mm. on a mechanical shaker.
Remove the nest of sieves from the shaker and weigh the amount of material retained on each sieve, and the dust passing into the receiver at the base of the nest. Any granules lodged in the meshes of a sieve shall be included as the material retained on the sieve.
5.4.5 Expression of results
Report the mass of material on each sieve, and the dust in the receiver, as a percentage of the total mass of absorbent retained in the nest of sieves.
5.5 Flow resistance
5.5.1 Principle
To determine the resistance to flow under standard flow conditions. NOTE The test should be conducted during the absorbent activity test (5.1).
5.5.2 Apparatus
As defined for the activity test in 5.1.
differential pressure monitor, a differential pressure monitor with a minimum accuracy of ±0.01 mbar.BS 8618-2015 pdf free download.