IS 17071 : 2024/ISO 252 : 2023 Conveyor Belts - Adhesion Between Constitutive Elements - Test Methods
NATIONAL FOREWORD
This Indian Standard which is identical to ISO 252 : 2023 'Conveyor belts - Adhesion between constitutive elements - Test methods' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Conveyor Belts Sectional Committee and approval of the Production and General Engineering Division Council.
A conveyor belt is a looped belt that is driven by and wrapped around one or more pulleys. It is powered by an electric motor and supported by a metal plate bed or rollers upon which the conveyor belt rests. The pulley that powers a conveyor belt is referred to as the drive pulley and has an unpowered idler pulley.
These conveyor belts can be utilized for packing, sorting, assembling, inspecting, and transporting items. Common applications of roller bed conveyor belts include their use in postal sorting offices and airport baggage handling systems.
They are used to transport materials from one point to another, often over long distances. Conveyor belts can be made from a variety of materials, including PVC, polyester, cotton, and rubber. There are four main types of conveyor belts: flat belts, modular belts, timing belts, and V-belts.
This standard was first published in 2019. The present revision has been taken up to align it with ISO 252 : 2023.
The major changes incorporated in this revision are as follows:
a) Former Fig. 1 has been deleted;
b) The requirements regarding autographic record of force have been modified (see 7.1 and 7.2); and
c) The sentence “Such a separation should be noted, but should not be considered as representative of the adhesion strength” has been deleted (former 6.1 and 6.2).
The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are however not identical to those used in Indian Standards. Attention is particularly drawn to the following:
a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker while in Indian Standards, the current-practice is to use a point (.) as the decimal marker.