How to Check Gas Cylinder Expiry Date in India
Quick answer: D25, D26 and A26 are not expiry dates — they are LPG cylinder safety re-testing codes stamped on the top ring. The letter marks the quarter (A = Jan–Mar, B = Apr–Jun, C = Jul–Sep, D = Oct–Dec) and the number is the year, so D-26 means the cylinder is due for re-testing between October and December 2026. Indian LPG cylinders are valid 15 years from manufacture before mandatory re-testing.
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Which D-code is due right now? (checked 5 September 2026)
| Code | Quarter | Status as of September 2026 |
|---|---|---|
| D-23 | Oct–Dec 2023 | Overdue — due for re-testing |
| D-24 | Oct–Dec 2024 | Overdue — due for re-testing |
| D-25 | Oct–Dec 2025 | Overdue — already due for re-testing |
| D-26 | Oct–Dec 2026 | Not yet due — falls due this coming Oct–Dec |
| D-27 | Oct–Dec 2027 | Not yet due |
Reading this after September 2026? The rule still works — work out the current quarter using the A/B/C/D key below, and any code from an earlier quarter-year combination is already due. This page covers only the D-quarter (October–December) codes. If your cylinder is stamped with an A, B or C code instead, see our dedicated guide to A26, B27 and C26 explained.
Did you know that every LPG gas cylinder in India carries a stamped date code on it? Most Indian families use gas cylinders daily but never check whether their cylinder is still certified safe to use. A cylinder that is overdue for re-testing can be a safety hazard — and it can also hold up your next refill, which is why a portable butane stove is worth keeping as a backup.
In this guide, we will show you exactly how to read your gas cylinder date code, what codes like D25, D26 and A26 mean, and what to do if your cylinder is overdue.
What Does Gas Cylinder "Expiry" Actually Mean?
Every LPG gas cylinder manufactured in India has a fixed lifespan. According to the Bureau of Indian Standards (BIS) and the Explosives Department, a domestic LPG cylinder is valid for 15 years from the date of manufacture. After that, it must undergo a re-test (hydro test) to be certified safe for further use.
Note the wording: the stamped code is a testing due date, not a food-style expiry. The cylinder does not become dangerous the day it lapses — but using one beyond its due date without re-testing is against safety regulations, and your distributor may pull it for testing instead of refilling it.
How to Check Gas Cylinder Date Code — Step by Step
Step 1: Find the Marking on the Cylinder
Look at the top ring (the metal ring around the valve area) of your gas cylinder. You will find alphanumeric codes stamped on it containing the month and year of manufacture, next due test date, company name, and BIS license number.
Step 2: Read the Date Code
The date code follows a specific format like A-26, D-25 or D-26:
- A = January to March (Q1)
- B = April to June (Q2)
- C = July to September (Q3)
- D = October to December (Q4)
The number is the year. So A-26 = Jan-Mar 2026, D-25 = Oct-Dec 2025, and D-26 = Oct-Dec 2026.
Step 3: Check the Next Test Due Date
On the cylinder you will see two dates — original test date (left) and next due test date (right). If the next due date has passed, your cylinder needs re-testing.
Color Codes on Gas Cylinders
- Red/Maroon — Domestic LPG
- Blue — Industrial gas
- Grey — Medical oxygen
- Black and White — Carbon dioxide
What to Do If Your Cylinder Is Overdue?
- Do not panic — it will not burst immediately
- Stop using it if you see damage, rust, or smell gas
- Contact your distributor for a replacement
- Never refill from unauthorized sources
While you wait for a replacement cylinder, a ZORACook butane gas cylinder (₹199) and a Mini Camping Stove (₹350) make a reliable backup for daily cooking — no LPG booking, no installation.
| LPG cylinder (14.2 kg) | ZORACook butane can (225g) | |
|---|---|---|
| Testing code to track | Yes — A/B/C/D + year, stamped on the collar | None — just a pre-use visual check for dents or rust |
| If a due date has passed | Distributor may hold the cylinder back for re-testing before refilling | Not applicable — retire a damaged can and open a fresh one |
| Wait time when you need gas today | Booking + delivery cycle | Ready to cook as soon as it arrives, from ₹199 |
| Works as an LPG backup | — | Yes — Mini Camping Stove ₹350 or Portable Gas Stove ₹1,099 |
Kitchen Safety Tips
- Keep cylinder upright in a ventilated area
- Check rubber tube every 6 months, replace every 2 years
- Use soapy water to check for leaks
- Keep a fire extinguisher nearby
- Turn off regulator when not in use
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Frequently Asked Questions
What does D25, D26 or A26 mean on a gas cylinder?
These are LPG cylinder re-testing codes, not expiry dates. The letter marks the quarter (A=Jan-Mar, B=Apr-Jun, C=Jul-Sep, D=Oct-Dec) and the number is the year. D-26 means the cylinder is due for safety re-testing between October and December 2026.
How long is an LPG gas cylinder valid in India?
A domestic LPG cylinder in India is valid for 15 years from its date of manufacture, per BIS and Explosives Department norms. After that it must pass a hydro re-test to stay in service.
What should I do if my LPG cylinder has expired?
Do not panic — it will not burst immediately. Stop using it if you see damage, rust, or smell gas. Contact your distributor for a replacement, and never refill from an unauthorized source.
What color is a domestic LPG cylinder in India?
Domestic LPG cylinders in India are red or maroon. Blue is used for industrial gas, grey for medical oxygen, and black-and-white for carbon dioxide.
What can I use for cooking while I wait for a replacement LPG cylinder?
A portable butane stove and butane gas cylinder make a reliable backup while you wait for a distributor replacement or re-test — no LPG booking or installation needed. ZORACook butane cylinders start at ₹199. Shop the ZORACook 225g butane gas cylinder here.
What does D25 mean on a gas cylinder?
D25 means the cylinder was due for its statutory safety re-test between October and December 2025. As of September 2026, any cylinder still stamped D25 is now overdue for that re-test — check with your distributor at your next refill.
What does D26 mean on a gas cylinder?
D26 means the cylinder is due for its statutory safety re-test between October and December 2026. As of September 2026 it is not yet overdue — the testing window opens in October.
My cylinder shows an A, B or C code instead of a D code — what does that mean?
The same system, a different quarter: A = January–March, B = April–June, C = July–September. This page focuses on the October–December (D) codes; for A26, B27 and C26 specifically, see our gas cylinder code guide for A, B and C quarters.
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