TITLE-BIS IS 3937(PART 1):2022 Recommendations for socketing of wire ropes: socketing with zinc Scope: Covers the specifications of zinc and procedure to be adopted for socketing stranded wire ropes by molten zinc so that maximum safety is assured. The standard aims to regulate the specification of zinc and the procedure through which the socketing is done. Historical background: The standard was first published in 1967 and revised in 1974 and revised again in 2002. In the latest revision: 1) A reference clause has been added mentioning the latest version of all the referred standards. 2) Editorial corrections are done. Due to non-standardized socketing many wire ropes broke and caused damage. Hence, the type, amount and process for socketing using zinc had to be standardized. Related Industries: The standard relates to metal ropes (parallel stranded, cross stranded etc.) and sockets of various types. The industries affected are construction, agriculture and other heavy lifting industries. These are affected because of their extensive use of metal wire ropes and sockets for various purposes. Key Requirements: The material chosen for socketing is zinc conforming to IS 209 : 1992. The procedure of socketing is also standardized. In the procedure, the amount of zinc and dimensions of wire have specific relation which are standardized. The procedure of cleaning of end bristles of the wire- and the storage of zinc are also specified. Benefits and significance: The specification of steel and the procedure gives high strength and durability. This makes innumerous structures reliability and allows them to take loads for a long time. It prevents common failure. If the standard is not followed a complaint will be filed. Under extreme cases, license can be cancelled and case can be taken to the court also for prosecution. Challenges and limitations: 1) Hot zinc is hazardous in nature and difficult to manage for companies. 2)Zinc is easily oxidised and needs bone charcoal on surface to prevent it. 3)Void formation is difficult to completely eliminate, always leaving some defects. Compliance and cerification: Companies should use the zinc conforming to IS 209:1992 .For the procedure the machinery is not very technically advanced and easily available. The recommendations are certified by coherent approval of Wire Ropes and Wire Products Sectional Committee and Mechanical Engineering Division Council. These are then adopted by BIS, Impact on society and environment: These standards have increased durability, reliability and safety of the structures constructed. Without these standards failures of structures can happen affecting the society. Dams, ropeways etc. also depend on these standards. [Cable bridge over Narmada river (Bharuch, Gujarat) has used BIS 3937] [Other examples are Anji Khad bridge, Worli Sea Link etc.] Conclusion: This BIS standard is important as it standardizes the socketing of wire rope. It involves the regulation of the material, procedure of socketing. It is revised over time to meet the upcoming requirements. It helps in increasing efficiency and lifetime all the structures and machinery which use wire ropes. References: https://standards.bsb.co.in/BSBEdgeviewpdf.aspx, https://www.bis.gov.in/wpcontent/uploads/2023/03/GoL-Guidelines-06March2023.pdf, https://bis.gov.in/other/Enforcement_Manual.pdf BY: NAME: PRANAV TALIWAL SERIAL NO.- 797(BATCH 5) ; MAILID-pranav_t@me.iitr.ac.in ENROLLMENT NO -23117100 CONTACT NO- 9380490136
