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Blog

Evaluation of temperature influences on a pressure test

08. October 2020

Evaluation of temperature influences on a pressure test

In this blog post we deal with tightness tests with gaseous medium on underground pipelines. Here we focus on the influence of ambient air temperature on the temperature at different soil depths and the influence of temperature change on the tightness test. Temperature sensor The temperature...

Reading time: 8 min

Author: Clemens Fentker

The basics of pressure tests on water pipelines – German DVGW guideline W 400-2

29. September 2020

The basics of pressure tests on water pipelines – German DVGW guideline W 400-2

The DVGW Worksheet W 400-2 explains different methods for hydrostatic testing of pipelines in more detail. In addition to the pressure loss method, there is the water loss method and the visual inspection with operating pressure. What must be taken into consideration during visual inspection with...

Reading time: 7 min

Author: Lea Schwenen

The basics of pressure tests on water pipelines

07. August 2020

The basics of pressure tests on water pipelines

This blog post on the basics of pressure testing on water pipelines is an introductory article and also suitable for students and non-experts. For experienced professionals, the next articles on successful water pressure testing will go further into detail on the various methods and their...

Reading time: 9 min

Author: Lea Schwenen

Use of existing measurement technology in gas distribution systems with hydrogen components

Use of existing measurement technology in gas distribution systems with hydrogen components

We are receiving more and more enquiries from our customers on the subject of hydrogen (H₂). After this topic was dealt with hesitantly at the beginning, it is now picking up speed. The first test networks are in operation and further networks are in preparation. At the beginning, we talked...

Reading time: 6 min

Author: Bernd Esders

Automated leak detection

Automated leak detection

– an advanced warning system that conserves water and human resources. Climate change and shortage of qualified staff dominate the social agenda and water suppliers also struggle with these challenges: Water is precious; more so than ever during hot spells. Leaks must therefore be found...

Reading time: 11 min

Author: Clemens Fentker

Sensor principles explained

Sensor principles explained

Many of our handheld devices work with different sensors to measure gas and pressure. We will explain these different sensor principles here: Infrared sensor (IR-sensor) An infrared sensor measures wavelengths that are not visible to humans because they are below the red light visible to humans....

Reading time: 10 min

Author: Lea Schwenen

Gas leak detection: Measurement in PPM range or LEL?

Gas leak detection: Measurement in PPM range or LEL?

Pipeline network inspection – Gas leak detection with carpet probe and triangle probe In our last blog post LEL versus PPM we looked at the differences between the two measuring ranges and noted that the ppm range is generally used to detect the smallest concentrations. This is the case...

Reading time: 6 min

Author: Bernd Esders

LEL versus PPM

LEL versus PPM

– The basics of measuring ranges – The abbreviation LEL stands for Lower Explosion Limit and it corresponds to the concentration of a substance in the air above which there is a risk of explosion. The LEL of flammable gases such as methane, ethane, propane and butane is relevant for us;...

Reading time: 4 min

Author: Lea Schwenen

Inaccessible service line connections

Inaccessible service line connections

When inspecting gas pipeline networks, inaccessible service line connections are a problem that causes a lot of trouble and it is time consuming. Times have changed here. In the past, there were hardly any problems to enter properties in rural areas; rarely were the properties completely fenced...

Reading time: 4 min

Author: Bernd Esders