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Gaznet
Gaznet mobile CNG filling station installed at a customer site

Sales, maintenance and engineering — for every gas project

ADR-certified specialists supplying and servicing MEGC containers across Eastern Europe and the Mediterranean since 2005.

What we do

One team from the first specification through to the inspection that keeps the unit on the road. We supply new MEGC containers, we service the ones already in your fleet — whoever built them — and we engineer the units that don’t exist off the shelf. For the equipment behind these services, see our products and solutions.

Sale and supply

Exclusive sales and service partner for Umoe Advanced Composites AS since 2005 — Multiple Element Gas Containers for CNG, biomethane, and hydrogen across Poland, Ukraine, the Baltics, Hungary, Romania, Bulgaria, the Balkans, and the Mediterranean. Every unit is specified around your pressure rating, payload, and route, and delivered ADR-approved with its document pack.

ADR inspection and re-certification

Certified ADR testing specialists with two decades in gas-system applications. We run both intervals — the five-year periodic inspection and the ten-year re-certification — on Vítkovice, Hexagon, Umoe, and our own containers. What each interval covers.

Spare parts and component replacement

Valves, pressure-relief devices, gaskets, and fittings for containers already in service. We source and fit the parts for the brands we service, so a unit that needs a component replaced at inspection doesn’t sit idle waiting for it.

Engineering and custom builds

Containers, skids, and mobile filling stations engineered to your specification — pressure rating, payload, route, and integration with the equipment you already run. Our own builds go through the same approval route as everything else we supply, and we service them for their full life. See custom builds.

Installation and commissioning

We install the unit on your site, commission it, and train the people who will run it — the operating routine, the daily checks, and the paperwork that has to travel with the container. The equipment is productive from the first day, not the first month.

Periodic inspection and re-certification

A gas container earns money only while its inspection documents are valid. Under ADR the cycle is fixed — a periodic inspection every five years, and a heavier service at ten. When the date passes, the unit is off the road until it has been through the tests and the paperwork has been reissued.

We do the physical work. The container is stripped down, every cylinder is pressurised to its test pressure, the piping and the valves are tested, the frame is inspected, and the unit is reassembled — all of it in our own workshop, by our own people. Kiwa Inspecta Estonia — our notified body — witnesses the tests and issues the certificate. On a 250-bar MEGC that means a hydraulic test at 375 bar held for the prescribed time, a leak test at working pressure, and the pipework pressurised to 375 bar.

Book the date with us in advance and we plan the work around your operating window — a container standing in a workshop is a container not earning.

Hydraulic pressure test in progress on a cylinder in the Gaznet workshop, pump and gauge connected, customer container behind
Hydraulic pressure test under way in our workshop — the cylinder is filled with water and pressurised to its test pressure.
Cylinder pack lifted out of its container frame and set down in the workshop for inspection
The pack comes out of the container before testing — disassembly and reassembly are ours.
Manifold panel of a MEGC container with section valves and pressure gauges, opened for inspection
Manifold, section valves, and gauges — checked and replaced where needed.

Five-year periodic inspection

The interval that keeps the container legal. Documents examined, exterior and interior inspected, every cylinder hydraulically pressure-tested, piping and service equipment tested, frame checked. Anything out of tolerance is corrected or replaced before the unit leaves, and the inspection date is reset for another five years.

Ten-year service

The heavier interval. Everything in the five-year scope, plus the wear items that do not survive a decade on the road: valves and pressure-relief devices replaced, full frame integrity inspection, corrosion protection and coating restored, and the pressure vessels re-approved where the notified body requires it.

What a periodic inspection covers
Inspection step Scope Reference
Examination of documents Type approval, previous inspection reports, data plate and cylinder markings TPED 2010/35/EU
Exterior and interior inspection Cylinders, mounts, coating — damage, corrosion, legibility ADR 6.2.1.6
Hydraulic pressure test Every cylinder pressurised to test pressure — 375 bar on a 250-bar container — and held ADR 6.2.1.6
Leak test Complete container tested at working pressure, 250 bar EN 12972
Test of piping Pipework and manifolds pressurised to 375 bar EN 12972
Service equipment and safety devices Valves, pressure-relief devices and gauges checked, replaced where needed ADR 6.2.1.6
Frame inspection Structural integrity of the container frame and cylinder mounts EN 12972

Pressures shown are from a 250-bar MEGC; the test pressure always follows the container's own type approval. Disassembly, pressure testing, and reassembly are carried out by Gaznet Industrial; the inspection is certified by our notified body, Kiwa Inspecta Estonia (NB 1336).

Containers we service

We are not tied to the containers we sold you. Steel or composite, we service the brands that are actually in the market — and where the unit came out of our own workshop, we know it down to the fitting.

Steel cylinder pack standing in a container frame in the Gaznet workshop
Close-up of steel gas cylinders with their valves inside a container frame
  • Vítkovice

    Cylinder packs and transport containers.

  • Hexagon

    Composite cylinder modules for CNG and hydrogen.

  • NPROXX

    Type-4 hydrogen and CNG cylinder containers.

  • Umoe Advanced Composites

    Type-4 MEGC containers — their service partner since 2005.

  • Gaznet-built units

    Containers, skids, and filling stations we engineered and built ourselves.

Built in our own workshop

Containers, frames, and cradles are fabricated, piped, painted, and ADR-plated in Tallinn — which is also why we can service them years later without guessing what is inside.

ADR-plated gas transport container built by Gaznet, painted and standing in the workshop
A container of our own build, plated and ready for its documents.
Composite pressure vessel seated in a steel cradle fabricated by Gaznet, gauge connected for testing
Composite vessel in a cradle we fabricated, on test.

Two decades of gas-system work

Our team is small, technical, and end-to-end. The same engineers who specify a container are the ones who come back to inspect it.

Umoe partner since
2005
Certified testing specialists
ADR
Reply to your specification
1 day

Recent projects

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