20 bookings today across Pune & Chennai Is your retest due?
Green Energy Solutions logo Green Energy SolutionsCNG Cylinder Testing India
Govt approved testing centre · Pune & Chennai

Book CNG testing & retrofitment in 30 seconds.

India's trusted CNG cylinder testing & retrofitment platform. Pick a slot online, drive in, and leave with a stamped test certificate — no queues, no guesswork.

  • Govt approved
  • Fast service
  • Digital tracking
  • WhatsApp updates

Quick booking

Checking slots…
No payment needed to book · Confirmation on WhatsApp

Every cylinder tested at 300 bar

PESO approved testing ISO certified processes Gas Cylinders Rules, 2016 IS 15490 hydrostatic test Type-approved CNG kits WhatsApp booking
What we do

Everything your CNG system needs, under one roof

From the mandatory 3-year hydro test to a brand-new sequential kit — certified technicians, calibrated equipment and paperwork that clears RTO.

Compare services
Technicians performing a hydrostatic test on a CNG cylinder Most booked

CNG cylinder hydro testing

The legally required retest every 3 years. We test at 300 bar — 1.5× working pressure — and stamp and certify every cylinder that passes.

  • Done in 2–3 hours, while you wait
  • Stamped cylinder + digital test certificate
  • Valve removal, inspection, leak test included
Starts at
₹1,100 / cylinder
CNG cylinder fitted in the boot of an SUV
From₹49,000

CNG kit retrofitment

Sequential kits from leading brands, fitted in a day with RC endorsement support.

Pressure gauges and valves
From₹1,600

Cylinder valve replacement

Leaking or damaged valve? Certified replacement, torqued to spec and leak tested.

CNG cascade cylinder bank on a steel frame
Per cylinder₹1,700

Cascade manufacturing & testing

Cascade banks for CNG stations, mother-daughter supply and industry.

How it works

Three steps. No queue at the gate.

Booking takes less time than finding parking.

1

Select service

Choose testing, retrofitment or valve work and tell us your vehicle and cylinder size.

2

Choose a slot

See live availability for Pune or Chennai and lock the time that suits you.

3

Visit & get it done

Drive in at your time. Leave with a stamped cylinder, certificate and WhatsApp reminder for your next test.

Live slot preview

See what's open before you leave home

Each centre runs five testing slots a day with a fixed cylinder capacity, so your vehicle is never kept waiting. Green means open, orange means filling fast.

  • Up to 50 cylinders tested per centre, per day
  • Same-day slots until an hour before start time
  • Reschedule anytime on WhatsApp
Open full calendar
AvailableFilling fastFull
Inside a hydro test

What happens to your cylinder in those 2 hours

Scroll through the eight checks every cylinder goes through before it earns a fresh stamp.

0bar applied
1/8checks done
  1. 01

    Check-in & documents

    We record your vehicle number, RC details and the cylinder's serial number, manufacture date and last test stamp.

  2. 02

    Safe de-gassing & removal

    Remaining CNG is vented safely, the cylinder is unbolted from the vehicle and the valve is removed.

  3. 03

    Visual inspection

    Inside and out: we look for dents, cuts, corrosion, bulges, fire damage and thread wear against the rejection criteria.

  4. 04

    Filling with water

    The cylinder is filled with water and placed in a water-jacket — water, not gas, so the test itself is completely safe.

  5. 05

    Pressurising to 300 bar

    Pressure is raised to 1.5× the 200 bar working pressure and held. The cylinder's stretch is measured precisely.

  6. 06

    Permanent expansion check

    After release, the cylinder must return to shape. Permanent expansion above the limit means it fails and is condemned.

  7. 07

    Drying & valve refit

    The cylinder is dried internally, the valve is refitted to the correct torque and leak tested with gas.

  8. 08

    Stamping & certificate

    The new test date is stamped, the cylinder is refitted and you receive a test certificate — valid for the next 3 years.

Free tool

Is your cylinder due for retest?

CNG cylinders must be hydro tested every 3 years. Enter the month on your last test stamp or certificate.

Never tested? Use the manufacture date stamped near the cylinder neck.
Where to look: the test date is punched on the cylinder shoulder (e.g. 03/23) and printed on your last test certificate.
0months left
—

Technicians at the hydro testing bench
Our testing bay
Cascade cylinder bank
CNG cylinder in a car boot
Why choose us

Built for drivers who can't afford a day off the road

Taxi owners, fleet managers and families trust us because we respect two things: safety and your time.

Govt approved facility

Testing to the Gas Cylinders Rules with calibrated, certified equipment.

Fast turnaround

Most hydro tests done in 2–3 hours. Retrofitment in a working day.

Digital booking

Book, reschedule and get your certificate details on WhatsApp.

PAN India support

Centres in Pune and Chennai, Bangalore opening soon, fleet support nationwide.

0Cylinders tested
0Vehicles converted to CNG
0Years' experience
0Fleet clients served
Certifications & approvals

Tested the way the law intends

PESO

PESO approved

Testing station approval under the Petroleum & Explosives Safety Organisation.

ISO

ISO certified

Documented, audited quality processes for every test and fitment.

Gas Cylinders Rules

Periodic testing as required by the Gas Cylinders Rules, 2016.

IS15490

IS 15490 standard

The Indian standard for on-board CNG cylinders used in vehicles.

Our centres

Drive in at Pune or Chennai

Bangalore centre opening soon — fleet support available now.

Pune — Warje centre

  • Warje, Pune, Maharashtra
  • Mon – Sat, 9:30 AM – 6:00 PM
  • 5 slots daily · up to 50 cylinders
  • +91 93424 24356

Chennai centre

  • Chennai, Tamil Nadu
  • Mon – Sat, 9:30 AM – 6:00 PM
  • 5 slots daily · up to 50 cylinders
  • +91 93424 24356

Bangalore — opening soon

We already support fleets in Bengaluru with scheduled on-site visits. Message us to join the waiting list or arrange fleet testing.

Quick answers

Questions drivers ask us every day

Can't find yours? We answer on WhatsApp within working hours.

All FAQs

Every 3 years from the date of manufacture or the last hydro test. The date is stamped on the cylinder shoulder and printed on your previous certificate. Fuel stations can refuse to fill a cylinder with an expired test.

Hydro testing starts at ₹1,100 per cylinder depending on the cylinder size. You'll see the exact estimate before you book, and fleets of 5+ cylinders get automatic discounts. See pricing

About 2–3 hours for a single cylinder including removal and refitting. Valve replacement takes under an hour; kit retrofitment takes one working day.

Your vehicle RC, the previous cylinder test certificate (if you have it), and a photo ID. For retrofitment, also bring your insurance policy.

Prefer WhatsApp? Book in one message.

Send your vehicle number and preferred day. We'll reply with open slots and confirm your booking in the same chat.

Call +91 93424 24356 Book on WhatsApp