【国外标准】 Standard Specification for Grade 80 and Grade 100 Alloy Steel Chain Slings for Overhead Lifting

This specification covers requirements and method of rating and testing for alloy chain slings. Only component parts compatible with alloy chain shall be used. Sling assembled by welding shall be fabricated by the electric or gas welding process, or both. The material shall undergo proof test to meet the prescribed mechanical requirements. Several grades of alloy chain sling shall conform to the specified working load limit values.1.1 This specification covers the requirements and method of rating and testing for alloy chain slings. Slings shall be assembled using components manufactured in accordance with Specification A391/A391M for Grade 80 chain, Specification A973/A973M for Grade 100 chain, and Specification A952/A952M for other components. This specification covers welded and mechanically assembled slings.1.2 This specification does not cover slings used at elevated temperatures (above 400 °F [200 °C]), in harmful or corrosive environmental conditions or for applications such as nonsymmetrical legs or loading.1.3 This specification is a performance and assembly specification. Other standards, such as OSHA 1910.184, ASME B30.9, and ASME B30.10, apply to the use of the products in this specification.1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.