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 Amendments to Indian standards, particulars of which are given in schedule hereto annexed have been established

REGD. No. D. L.-33004/99 The Gazette of India CG-DL-E-21012026-269498 EXTRAORDINARY PART III-Section 4 PUBLISHED BY AUTHORITY No. 55] NEW DELHI, TUESDAY, JANUARY 20, 2026/PAUSHA 30, 1947 THE GAZETTE OF INDIA : EXTRAORDINARY [PART III-SEC.4] BUREAU OF INDIAN STANDARDS (Department of Consumer Affairs) NOTIFICATION New Delhi, the 19th January, 2026 Ref: HQ-PUB015/1/2020-PUB-BIS (1405). 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 Amendments to Indian standards, particulars of which are given in schedule hereto annexed have been established. SCHEDULE +-----+----------------------------------------------------------------------+---------------------------+----------------------------------+--------------------------------------------------------------------------------+ | Sl. | No., Year & Title of the Indian Standard | No. and | Date of | Date till which the standard without | | No. | | Month/Year of the | Establishment of | the amendment as mentioned in | | | | Amendment | the Amendment | column 3 shall remain in force | +=====+======================================================================+===========================+==================================+================================================================================+ | (1) | (2) | (3) | (4) | (5) | +-----+----------------------------------------------------------------------+---------------------------+----------------------------------+--------------------------------------------------------------------------------+ | 1 | IS 1791: 2020 | Amendment No. 1 | 16 January 2026 | 15 July 2026 | | | General Requirements for Batch Type Concrete Mixers | January 2026 | | | | | (Third Revision) | | | | +-----+----------------------------------------------------------------------+---------------------------+----------------------------------+--------------------------------------------------------------------------------+ | 2 | IS 3315: 2024 | Amendment No. 1 | 16 January 2026 | 15 July 2026 | | | Direct Evaporative Air Cooler — Specification | January 2026 | | | | | (Fourth Revision) | | | | +-----+----------------------------------------------------------------------+---------------------------+----------------------------------+--------------------------------------------------------------------------------+ | 3 | IS 5456: 2024 | Amendment No. 1 | 16 January 2026 | 15 July 2026 | | | Positive Displacement Type Air Compressors and Exhausters — | January 2026 | | | | | Testing and Acceptance (Third Revision) | | | | +-----+----------------------------------------------------------------------+---------------------------+----------------------------------+--------------------------------------------------------------------------------+ | 4 | IS 9523: 2000 | Amendment No. 7 | 16 January 2026 | 15 July 2026 | | | Ductile Iron Fittings for Pressure Pipes for Water, Gas and Sewage — | January 2026 | | | | | Specification (First Revision) | | | | +-----+----------------------------------------------------------------------+---------------------------+----------------------------------+--------------------------------------------------------------------------------+ | 5 | IS 9550: 2024 | Amendment No. 1 | 16 January 2026 | 15 July 2026 | | | Bright Steel Bars — Specification (Second Revision) | January 2026 | | | +-----+----------------------------------------------------------------------+---------------------------+----------------------------------+--------------------------------------------------------------------------------+ | 6 | IS 13095: 2020 | Amendment No. 3 | 16 January 2026 | 15 July 2026 | | | Butterfly Valves for General Purposes | January 2026 | | | | | (First Revision) | | | | +-----+----------------------------------------------------------------------+---------------------------+----------------------------------+--------------------------------------------------------------------------------+ | 7 | IS 16542: 2016 | Amendment No. 2 | 16 January 2026 | 15 July 2026 | | | Direct Insertion Type Storage Water Tank for All Glass Evacuated | January 2026 | | | | | Tubes Solar Collector — Specification | | | | +-----+----------------------------------------------------------------------+---------------------------+----------------------------------+--------------------------------------------------------------------------------+ | 8 | IS 17891 (Part 1): 2023 | Amendment No. 1 | 16 January 2026 | 15 July 2026 | | | ISO 3601-1: 2012 Fluid Power Systems - O-Rings Part 1 Inside | January 2026 | | | | | Diameters, Cross-Sections, Tolerances and Designation Codes | | | | +-----+----------------------------------------------------------------------+---------------------------+----------------------------------+--------------------------------------------------------------------------------+ CHITRA GUPTA, Scientist G & DDG (Hallmarking and Training) [ADVT.-III/4/Exty./630/2025-26] 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.