IS 1726:1991
Cast iron drain covers, manhole covers and frames
BIS QCO · ISI MARK · 4 LINES · STEEL AND STEEL PRODUCTS QUALITY CONTROL ORDER AND ALLIED NOTIFICATIONS, INCLUDING S.O. 1071(E), S.O. 2287(E), S.O. 4326(E), S.O. 5029(E) AND S.O. 777(E)
IS 1726 specifies the requirements for cast iron manhole covers, frames, gratings and ancillary articles supplied for drainage chambers, road infrastructure and utility access. The standard governs material grade, load-bearing class, cover seating and dimensional tolerance for buried infrastructure castings.
At a glance
4
Tariff lines covered (8-digit HSN)
Chapter 73
Primary HSN chapter
ISI
Mark scheme
Steel and Steel Products Quality Control Order and allied notifications, including S.O. 1071(E), S.O. 2287(E), S.O. 4326(E), S.O. 5029(E) and S.O. 777(E)
Governing Quality Control Order
Tariff lines covered
Heading 7325
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Speak to an Expert Last verified against gazette notifications: 2026-05-16. Source: BIS / Indian Customs CUSDATA.
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