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.
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.
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
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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.