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In pursuance of Sub rule (1) of Rule (15) of the Bureau of Indian Standards Rules, 2018, the Bureau of Indian Standards

Issue Date: 25 November 2025 Published: 05 December 2025
Gazette ID: CG-DL-E-05122025-268249 Download PDF
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Core Purpose

The Bureau of Indian Standards notifies the cancellation and withdrawal of eight specific Indian Standards, as detailed in the annexed schedule, in pursuance of Sub-rule (1) of Rule (15) of the Bureau of Indian Standards Rules, 2018.

Detailed Summary

The Bureau of Indian Standards, under the Department of Consumer Affairs, issued Notification Ref: HQ-PUB017/1/2020-PUB-BIS (1369) on 17th November, 2025. This notification announces the cancellation and withdrawal of eight Indian Standards, effective from 10th November, 2025, in accordance with Sub-rule (1) of Rule (15) of the Bureau of Indian Standards Rules, 2018. The withdrawn standards include: IS 4257 (Part 2) - 1986 (Dimensions for Clamping Arrangements for Porcelain Transformer Bushings), IS 4318: 1993 (Solid Core Porcelain Insulators for Overhead Traction Lines), IS 5350 (Part 1) - 1970, IS 5350 (Part II) - 1973, and IS 5350 (Part III) - 1971 (all related to Dimensions of Indoor and Outdoor Porcelain Post Insulators), IS 7648 – 1975 (Specification for Silicone Compounds for Application on High Voltage Porcelain Insulators), IS 13134: 1992 (Guide for the Selection of Insulators in Respect of Polluted Conditions), and IS 13203: 1991 (Method for Verifying Accuracy of Tan Delta Measurements). The notification was signed by Chitra Gupta, Scientist G & DDG (Hallmarking and Training).

Full Text

REGD. No. D. L.-33004/99 The Gazette of India CG-DL-E-05122025-268249 EXTRAORDINARY PART III—Section 4 PUBLISHED BY AUTHORITY No. 764] NEW DELHI, TUESDAY, NOVEMBER 25, 2025/AGRAHAYANA 4, 1947 BUREAU OF INDIAN STANDARDS (Department of Consumer Affairs) NOTIFICATION New Delhi, the 17th November, 2025 Ref: HQ-PUB017/1/2020-PUB-BIS (1369).- In pursuance of Sub-rule (1) of Rule (15) of the Bureau of Indian Standards Rules, 2018, the Bureau of Indian Standards hereby notifies that the Indian standards, particulars of which are given in schedule hereto annexed have been cancelled and stands withdrawn from the date indicated against it in the third column. SCHEDULE | SI No. | No., Year & Title of the Indian Standard Withdrawn | Date of Withdrawal | |------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------| | (1) | (2) | (3) | | 1 | IS 4257 (Part 2) - 1986 Dimensions for Clamping Arrangements for Porcelain Transformer Bushings Part 2 for 72.5 kV and 123 kV Bushings | 10 November 2025 | | 2 | IS 4318: 1993 Solid Core Porcelain Insulators for Overhead Traction Lines — Specification (First Revision) | 10 November 2025 | | 3 | IS 5350 (Part 1) - 1970 Dimensions of Indoor and Outdoor Porcelain Post Insulators and Post Insulator Units for Systems with Nominal Voltages Greater Than 1000 V Part I Indoor Post Insulators | 10 November 2025 | | 4 | IS 5350 (Part II) - 1973 Dimensions of Indoor and Outdoor Porcelain Post Insulators and Post Insulator Units for Systems with Nominal Voltage Greater Than 1000 V Part II Outdoor Cylindrical Post Insulators (First Revision) | 10 November 2025 | | 5 | IS 5350 (Part III) - 1971 Dimensions of Indoor and Outdoor Porcelain Post Insulators and Post Insulator Units for Systems with Nominal Voltages Greater Than 1 000 V Part III Outdoor Pedestal Post Insulators | 10 November 2025 | | 6 | IS 7648 – 1975 Specification for Silicone Compounds for Application on High Voltage Porcelain Insulators | 10 November 2025 | | 7 | IS 13134: 1992 Guide for the Selection of Insulators in Respect of Polluted Conditions | 10 November 2025 | | 8 | IS 13203: 1991 Method for Verifying Accuracy of Tan Delta Measurements | 10 November 2025 | CHITRA GUPTA, Scientist G & DDG (Hallmarking and Training) [ADVT.-III/4/Exty./500/2025-26] Uploaded by Dte. of Printing at Government of India Press, Ring Road, Mayapuri, New Delhi-110064 and Published by the Controller of Publications, Delhi-110054. GORAKHA NATH YADAVA Digitally signed by GORAKHA NATH YADAVA Date: 2025.12.05 11:53:06 +05'30'

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