(ISO 7592 International Standard INTE RNATIONAL ORGANIZATION FOR STANDARDIZATION MEKAYHAPOAHAR OPrAHM3AUWR O CTAHAAPTW3AUWMORGANISATION INTERNATIONALE DE NORMALISATION ANsI Internat Doc Sect Calibrated round steel link lifting chains - Guidelines to proper use and maintenance Chaines de levage calibreées en acier rond -- Principes directeurs pour une utilisation et un entretien appropriés First edition - 1983-10-15 UDC 621.86.065.4 ISO 7592-1983 (E) Ref. No. iSO 7592-1983 (E) Descriptors : chains, chain-blocks, utilization, inspection, instructions. Price based on 4 pages efrom IHS Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of developing International Standards is carried out through ISO technical committees. Every member body interested in a subject for which a technical committee has been authorized has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approvat before their acceptance as International Standards by the ISO Council. International Standard ISO 7592 was developed by Technical Committee ISO/TC 111, Round steel link chains, lifting hooks, and accessories, and was circulated to the member bodies in July i982. It has been approved by the member bodies of the following countries : Australia Germany, F.R. Romania Austria India South Africa, Rep. of Belgium Ireland Spain Canada Japan Sweden Czechoslovakia Korea, Rep. of United Kingdom Egypt, Arab Rep. of Netherlands USSR France Poland No member body expressed disapproval of the document. International Organization for Standardization, 1983 Printed in Switzerland Copyright International Organization for Standardization Not for Resal ISO 7592-1983 (E) INTERNATIONAL STANDARD Calibrated round steel link lifting chains s - Guidelines to proper use and maintenance Scope and field of application The chain should not be allowed to pick up dirt, etc. which would impair its free movement and which if carried into the This International Standard specifies the main principles for the equipment and deposited in the pockets of the pocket wheel in-service testing and maintenance of use, inspection, could affect the proper seating of the chain in the pockets. calibrated round steel link chains operating over chain wheels. The principal applications include manual and power driven hoists. may be required to run: NOTE -- Lifting chains may be governed by national and local laws and a) idler wheels, which change the direction of the chain regulations. but do not substantially affect its tension; b) driving wheels, which change both tension in the chain and its direction. This type also includes driven wheels, 2 References such as the wheel driven by the hand chain of a manually operated hoist. iso 1836, Short link chain for lifting purposes - Grade M(4) calibrated, for chain hoists and other lifting appliances. 3.3.1 Idler wheels of relatively large diameter (not less than 6 ISo 3077, Short link chain for lifting purposes -- Grade T(8) X pitch of chain recommended) used with lightly loaded chain calibrated, for chain hoists and other lifting appliances. may be plain sheaves with circular grooves. Smaller wheels, or a higher chain tension, require flats or pockets to accom- Iso 4301, Lifting appliances -- Classification. modate the link as chords to the wheel circumference to avoid bending and to provide sufficient bearing area. In most installations guides are required to remove twist from Chain usage 3. the approaching chain and to atign it correctly in the rotational plane of the wheel. Such guides should also prevent the chain disengaging the wheel should it become slack. In the interests of safety, reliable operation and satisfac- 3.1 tory life, proper usage of c