Gas Cylinder Expiry Date Code Explained: A26, B27, C26 & D25 Decoded (India 2026)
Short answer: The code on your LPG cylinder's collar — like A26, B27, C26 or D25 — is not an expiry date. It's the statutory testing due date: the letter marks the quarter (A = Jan–Mar, B = Apr–Jun, C = Jul–Sep, D = Oct–Dec) and the number is the year. So C26 means the cylinder is due for testing between July and September 2026. ZoraCook's portable butane gas cans work differently — no statutory testing, no waiting on a distributor, ready to cook from ₹199.
What Does the A/B/C/D Code on a Gas Cylinder Actually Mean?
Every domestic LPG cylinder in India carries a stamped alphanumeric code — one letter followed by two digits, such as A26, B27, C26 or D25. It looks like an expiry date, and most people treat it like one, but it's technically something else: a Statutory Testing Due Date.
Here's how to read it:
- A = January–March
- B = April–June
- C = July–September
- D = October–December
- The number is the last two digits of the year
So D25 means the cylinder is due for a safety re-test sometime between October and December 2025. A26 means January–March 2026. This test cycle repeats roughly every five years — the oil marketing company (IOCL, HPCL or BPCL) inspects the cylinder for wear, corrosion and pressure integrity, then re-stamps it with a fresh due date before it goes back into circulation.
Where Do I Find the Code on My Cylinder?
Look at the three metal collars (the flat strips) around the valve at the top of the cylinder. The testing code is stamped into one of them, usually alongside the cylinder's manufacture date and tare weight. It's small and easy to miss if you've never looked for it — most households only notice it when a delivery agent points it out at a refill.
What Happens If My Cylinder's Testing Date Has Passed?
A passed testing date doesn't mean your cylinder is unsafe to use right now — it means the next refill may be delayed. Distributors are expected to pull an overdue cylinder for re-testing before refilling it, which can mean your exchange takes longer than usual, sometimes a day or more, right when you need gas the most.
This is where most Indian households get caught off guard: not by the cylinder itself, but by the wait. If your refill is stuck for a testing cycle, a wedding, a festival, or simply a delivery backlog, you're left without a working stove until it's sorted.
Do ZoraCook Butane Gas Cans Also Have an Expiry Date?
No — and that's the practical difference. ZoraCook's portable butane gas cans are sealed, disposable cassette cans, not refillable pressure vessels. There's no statutory testing cycle, no collar stamp to decode, and no distributor approval needed before you can use one. You simply check the can for dents, rust or leaks before lighting — a 30-second visual check — and you're cooking.
| Feature | LPG Cylinder (14.2 kg, refillable) | ZoraCook Butane Gas Can |
|---|---|---|
| Type | Refillable, returned to distributor each time | Disposable, single-use cassette can |
| What the code means | Statutory testing due date (A/B/C/D + year), stamped on the collar | No statutory code — just a pre-use visual check |
| Who checks it | Oil marketing company technician, at refill | You, before every use |
| If the due date passes | Distributor may delay your next refill for re-testing | Not applicable — just retire a dented, rusted or leaking can and use a fresh one |
| Availability during a shortage or delay | You wait for the booking, quota and delivery cycle | Order online, ships fast, no quota or booking system |
What Should You Do When Your LPG Refill Is Delayed?
The most practical fix isn't waiting anxiously by the phone for your delivery agent — it's keeping an independent backup that doesn't run on the LPG booking system at all. A ZoraCook Portable Gas Stove (₹1,199) or the compact Mini Camping Stove (₹330) runs on butane cans instead of your LPG connection, so a delayed refill, a testing-cycle hold-up, or a sudden shortage doesn't leave your kitchen dark. We covered this in more detail in our guide to portable stoves as an LPG backup — worth a read if refill delays have hit your household before.
Both stoves are compatible with the full range of ZoraCook butane cans below, so once you have the stove, keeping fuel on hand is simple and inexpensive.
How Many Butane Cans Should You Keep as Backup?
One can is a good starting point; a multi-pack works out cheaper per can and means you're never caught short. Here's the current lineup on ZoraCook's Butane Gas Cylinders collection:
| Pack size | Price | Price per can |
|---|---|---|
| Single can | ₹199 | ₹199 |
| Pack of 2 | ₹299 | ₹150 |
| Pack of 3 | ₹350 | ₹117 |
| Pack of 4 | ₹499 | ₹125 |
| Pack of 6 | ₹699 | ₹117 |
| Pack of 8 | ₹999 | ₹125 |
| Pack of 12 | ₹1,360 | ₹113 |
For a household keeping a genuine emergency backup, the Pack of 3 or Pack of 4 is the sweet spot — enough fuel to cover several days of cooking without tying up too much cash in advance. Campers and trekkers heading out for a longer trip usually go straight to the Pack of 6 or Pack of 8.
How to Store and Handle Butane Gas Cans Safely
Butane cans are convenient, but they're still a flammable gas product and deserve the same respect as any cylinder in your kitchen:
- Store upright, in a cool, dry place below 40°C, away from direct sunlight and heat sources.
- Keep away from children and away from open flames or sparks.
- Inspect before every use — never use a dented, rusted or leaking can.
- Use only in a ventilated area — never inside a sealed tent, car, or closed room.
- Never puncture or incinerate a can, even when it's empty.
- Note: butane cans cannot be carried in checked or cabin airline baggage.
Frequently Asked Questions
What does C26 mean on a gas cylinder?
C26 means the cylinder is due for its statutory safety re-test sometime between July and September 2026. C is the quarter code (July–September) and 26 is the year. It is not a hard expiry date — it's a testing checkpoint managed by the oil marketing company.
Can I still use my LPG cylinder if the testing date has passed?
The cylinder itself doesn't stop working the day the code lapses, but your distributor may hold it back for re-testing before the next refill, which can delay your exchange. Keeping an independent butane backup means a testing-cycle delay doesn't stop your cooking.
Do ZoraCook butane gas cans expire?
They don't carry a statutory testing code like LPG cylinders. Just inspect each can for dents, rust or leaks before use — never use a can that shows any of these signs — and store it correctly (cool, dry, upright, away from heat and children).
Are ZoraCook butane cans compatible with ZoraCook stoves and torches?
Yes. ZoraCook's cassette-style butane cans are compatible across the Portable Gas Stove, the Mini Camping Stove, and ZoraCook's handheld torch lighters. Screw-on and cassette-style connections differ between stove types, so check your specific stove's connection type before ordering fuel.
Where can I buy butane gas cans online in India?
ZoraCook's full range — from a single can at ₹199 up to a Pack of 12 at ₹1,360 — is available on the Butane Gas Cylinders collection page, with secure prepaid checkout via UPI, cards and wallets, free shipping above ₹999, and 7-day returns.
Never Wait on a Testing Cycle Again
Decoding the letter and year on your cylinder's collar is useful — but the real fix for refill-day anxiety is having fuel on hand that doesn't depend on anyone's booking system. Browse ZoraCook's Butane Gas Cylinders and keep a backup pack ready before you need one.
Safe-use reminder: Butane gas cans are a flammable product. Use only in well-ventilated areas, keep away from children and open flames, and never use a dented, rusted or leaking can.