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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

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

Basics – Pressure tests on gas pipelines

Basics – Pressure tests on gas pipelines

– Physical properties of a gas – gases heat up during compression – For pressure tests on gas pipelines, which are carried out with air or nitrogen, there are some physical effects, which we will try to explain here in a very simple way. Physical properties of gas: If the...

Reading time: 3 min

Author: Bernd Esders

Introduction – Why we write a blog

14. August 2019

Introduction – Why we write a blog

Dear colleagues and interested parties in the field of measurement technology in gas and water supply! Why do we write a blog? - We are asked the same questions in conversations time and again. Quite often we are asked for our opinion on current topics, such as new and amended regulations.

Reading time: 2 min

Author: Bernd Esders