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OLLI H2 hängend an einem Drahtzaun

Hydrogen in the gas network: Safe measurement, testing and flaring

Measurement technology for the safe handling of H2 in the gas infrastructure

Hydrogen already plays an important role in the energy supply as a result of various energy initiatives and is therefore more than just a potential alternative. However, its use also brings about changes in the requirements for the measurement technology employed and for general work on gas pipelines.

From measurement and pressure testing to controlled flaring: here you can find out what matters when handling hydrogen and which technologies can support you when working on H₂ pipelines.

Challenges in the use of hydrogen

Different properties require appropriate measurement technology

OLLI H2 am Bauzaun

Hydrogen differs fundamentally from natural gas or methane in terms of its key physical properties. The gas has a very low density, an extremely small volume and a wide ignition range. At the same time, pure hydrogen applications strictly require compliance with the stringent Explosion Group IIC. Due to this high volatility, even the smallest leaks can pose a safety risk – details that often played a minor role in previous natural gas operations. For network operators, this means that conventional measuring instruments reach their limits here. Highly sensitive, H₂-specific sensor technology with IIC approval is required to reliably detect leaks and safely monitor installations.

Practical examples and areas of application

How hydrogen-based testing and measurement can be implemented in practice

Using specific applications as examples, we demonstrate how hydrogen can be measured safely, how pipes can be tested, and how gas volumes can be flared in a controlled manner.

Related products

OLLI H2
OLLI H2
The OLLI H2 is an explosion-proof, compact gas detection and measurement device designed specifically for the targeted detection of hydrogen. It has been developed particularly for applications requiring robust and reliable monitoring of the gas, e.g. in gas infrastructure, in forming gas systems or in the field of hydrogen technology. The device is calibrated for hydrogen (H2) as standard. Optionally, an additional methane (CH4) measurement function can be integrated to allow flexible adaptation to different operational requirements. The OLLI H2 is supplied as a pump-powered version as standard and is equipped with a high-performance Li-ion battery. This makes it ideal for controlled sampling, leak detection and measurements in hard-to-reach places. Optionally, the device can also be fitted with an integrated pressure sensor. The extremely robust 2K plastic housing makes the OLLI H2 particularly durable for daily field use. The compact design and low weight ensure high carrying comfort even during long periods of use. Highlights: - Measurement of H2 (standard calibration) - Pump operation as standard - Li-ion battery for long operating times - Optional CH4 measurement - Optional pressure sensor - Compact, robust 2K housing - Suitable for use in potentially explosive atmospheres Technical data: - Operating time: > 50 hours (depending on ambient conditions, without lighting) - Dimensions: 170 × 80 × 43 mm - Weight: approx. 350 g - Temperature range: −20 °C ≤ Ta ≤ +50 °C Explosion protection: ATEX marking: II 2G Ex ib db IIC T4 Gb BVS 17 ATEX E 043 X IECEx marking: Ex ib db IIC T4 Gb IECEx BVS 21.0085X
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smart memo
smart memo
Electronic pressure measurement case for pressure tests with the option of connecting up to five external sensors (type EDS2). - the test procedures are menu-guided and can be carried out with simple data entry dialog - a freely programmable pressure test is included - optional test sequences for gas and water tightness tests e.g. according to DVGW, ÖVGW, EWE, Avacon, WEVG - a subsequent addition of test sequences is possible easily - large, illuminated display, even in direct sunlight easy to read - data entry and signature via touch display and foil keys - stylus for the touch display included - data memory for hundreds of measurements, depending on test sequence - wireless communication with an external device for updates and data transmission (costs apply for data transfer to the cloud) - LTE / GPS module (optional) - robust case (IP 67) - operating time approx. 200 hours, extension with power supply possible from outside Dimensions: 220 x 90 x 168 mm Weight: approx. 1450 g
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Mobile Gas Flare S
Mobile Gas Flare S
Small-sized and quickly ready-for-use gas flare for safe flaring applications of natural gas, hydrogen or other combustible gases. For reduction of operational methane emissions during commissioning and decommissioning of gas service lines in the house connection area (according German DVGW worksheet G 404). Suitable for emptying of gas tank facilities. - integrated piezo-ignition, up to 8 h with permanent ignition (1x AA battery) - ready for use in a few minutes, optimized for service lines - integrated flame arrestor for gases of explosion group: IIA, IIA1, IIB, IIC - H2-ready - max. operational pressure: 1 bar - max. volume flow approx. 8 Nm3/h methane at 1 bar - combustion efficiency under ideal conditions approx. 99% - connection accessory available
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Mobile Gas Flare M
Mobile Gas Flare M
Mobile and compact gas flare for the safe and environmentally friendly flaring of natural gas, hydrogen or other combustible gases. For preventing operational methane emissions during, for example, depressurisation, commissioning and decommissioning of pipelines. Complies with the requirements of DVGW Merkblatt G 404. Suitable for supply/distribution pipelines, limited suitability for house connections. Suitable for emptying of gas tank/storage facilities. - integrated piezo igniter, continuous ignition up to 8 h (1x AA battery). - quickly ready for use, short set-up time, high flow rate and low emission combustion - integrated flame arrester for gases of the explosion groups: IIA, IIA1, IIB, IIC - H2-ready - max. operating pressure 1 bar - max. flow rate approx. 40 Nm3/h methane at 1 bar - combustion efficiency under ideal conditions approx. 99% - connection accessories available separately - connection for optional pilot flame via Series 21 nipple
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Mobile Gas Flare L
Mobile Gas Flare L
Mobile Gas Flare incl. transport case for safe and environmentally friendly flaring of natural gas and other combustible gases. To avoid methane emissions during operation, e.g. when releasing pressure, commissioning and decommissioning pipelines. Complies with the requirements of DVGW data sheet G 404. Suitable for supply/distribution lines and for emptying tank systems. - incl. transport case - quickly ready for use, short set-up time, high throughput and low-emission combustion - combustion efficiency under ideal conditions >99% - integrated flashback arrestor for gases of the explosion groups: IIA, IIB, IIC - H2-ready - integrated pilot flame with propane supply and piezo igniter, continuous ignition up to 8 h (1x AA battery), incl. 2 replacement batteries - inlet pressure 2 bar (ensured by optionally available pressure reducer, art. no. 402593) - flow rate of approx. 800 Nm3/h methane at an inlet pressure of >2 bar on the supply side before the pressure reducer in the connection adapter - connection accessories available separately
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Frequently asked questions about hydrogen applications

Which measurement technology is suitable for hydrogen in gas networks?

When it comes to hydrogen, the sensor principle used and explosion protection play a crucial role. As hydrogen is classified in explosion group IIC, the equipment used must be certified to meet these stringent requirements. This is precisely where our OLLI H2 comes in: it is specifically designed for hydrogen measurements up to 100% by volume H₂ and is ideally suited for monitoring work areas and hydrogen flaring operations.

Hydrogen has a very low ignition energy and an extremely wide ignition range. For this reason, the gas is classified in the highest explosion group, IIC, which imposes particularly stringent requirements on explosion protection. When working on pure hydrogen pipelines, it is therefore essential to ensure that all measuring devices, flares and accessories used are explicitly approved for IIC applications.

In some cases, the requirements for pressure tests on H₂ pipelines are stricter than those for the conventional natural gas network. The DVGW Supplement G 469-B1 supplements the existing test procedures specifically for hydrogen. In practical terms, this means that additional specifications must be strictly adhered to, particularly when carrying out pressure measurement procedures.

No, the uncontrolled release of hydrogen should be avoided for safety and environmental reasons. During operations such as decommissioning, repairs or purging, hydrogen can instead be burned in a controlled manner via a suitable gas flare. A flame arrestor suitable for H₂ and continuous monitoring of the entire flaring process are crucial for safety.

Further reading on the subject of hydrogen

Blog

Gas abfackeln einer Versorgungsleitung in Bielefeld

Safety due to a flame arrester

Table of Contents We have been offering flaring devices or gas flares for flaring hazardous gas mixtures for many years. Since then, our mobile gas flares have been successfully used in a wide variety of applications, most of them in the field of gas supply. In the gas distribution network,

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