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ISO 14890:2013 pdf free

ISO 14890:2013 pdf free.Conveyor belts – Specification for rubber- or plastics-covered conveyor belts of textile construction for general use
The carcass shall consist either of one or more plies of woven fabric or of solid woven fabric and shall be impregnated or coated with a rubber or plastics mix.
Where a breaker consisting of open mesh fabric, or cord fabric or cord layer, is placed between the cover and carcass, or is embedded in the cover for the purpose of carcass protection, such a layer shall be considered part of the cover thickness and shall not be counted as a fabric ply.
If a fabric pile is integrally woven with the carcass on either one or both of the surfaces of the carcass, it shall be considered part of the carcass thickness.
NOTE The external surfaces of the conveyor belt generally consist of a defined thickness and quality of elastomeric material. Belting can also be supplied with one or both surfaces consisting of bare or coated fabric, as appropriate for the conveyor design and intended duty.
Belting that is ordered to an open-ended length shall be supplied subject to the tolerances specified in Table 2.
The length of belting supplied in the spliced endless form shall be described by the term“net endless length”. The net endless length shall be supplied subject to the tolerances specified in Table 3 when measured in accordance with ISO 16851.
It is recommended that purchasers, where placing orders for belting, specify a length of belting which includes the lengths required for testing and any additional lengths necessary for vulcanized joints.
If the rubber cover is designated as type H, D or L category it shall comply with the appropriate requirements of Table 5, and, after ageing for 168 h at 70 °C in accordance with ISO 188, the values obtained for tensile strength and elongation at break shall not vary from the original unaged values by more than 25 % of those values.
If the thickness of the rubber cover, as measured by the method described in ISO 583, is between 0,8 mm and 1,6 mm, the thickness of the test piece shall be the maximum obtainable and a tolerance of -15 % shall ben permitted on the tensile strength and elongation values given in Table 5.ISO 14890 pdf download.

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