The short answer: No, not unless BIS explicitly releases it under a free license.
Physical BIS offices have reading rooms. You can read any Indian Standard free of charge, take handwritten notes, and even photograph pages (for personal use only). No download, but you get the knowledge.
If you work for a large company, check your internal document management system. Many manufacturing firms purchase a BIS Corporate License, allowing all employees to download standards for free internally—though the company paid for the license.
Not currently. Most technical BIS standards are published only in English. Hindi versions exist for some basic codes (e.g., building construction), but not for this specialized flow measurement standard. is 3646 part 5 pdf free
Some professionals see the cost as an unnecessary burden. But consider the value:
In short, the cost is trivial compared to the risks of using a free, illegal copy.
When buying or searching, be aware of the revision history: The short answer: No, not unless BIS explicitly
| Revision Year | Key Changes | Status | |---------------|-------------|--------| | 1966 (First edition) | Original orifice plate method | Withdrawn | | 1976 | Added nozzle calculations | Withdrawn | | 1992 | Major update to material specs | Superseded | | 2008 | Harmonization with ISO 5167-1 | Reaffirmed with amendments | | Current (2018 + Amd.1) | Clarification on corner tapping location | Active |
Always check the reaffirmation year on the cover page. A standard is typically reaffirmed every 5 years. If you use a version reaffirmed in 2008 but not updated to 2018, your flow measurement may be non-compliant with legal metrology rules.
If you are a student or academic researcher working on a BIS-related project, write a formal letter to: Not currently
The Head (Standards), Bureau of Indian Standards, Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi – 110002.
Explain your research. BIS has been known to provide complimentary copies for non-commercial academic work, though the process can take 4–6 weeks.
Many engineering colleges and large PSUs (like ONGC, NTPC, BHEL) subscribe to the BIS Standards Portal campus-wide license. Ask your librarian or department head.