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Verifying the absence of air during pressure tests

Verifying the absence of air during pressure tests

Pressure tests are an essential component in the field of pipeline construction. With the use of a pressure test, the proper execution of the installation of all pipeline parts and ultimately the tightness of the pipeline is determined. Without a successful pressure test, no newly laid pipeline...

Reading time: 6 min

Author: Dr. Johannes Hopster

Advantages of a pressure test for cable conduits in the area of fibre optic installation according to ZTV TKNetz 40

31. January 2022

Advantages of a pressure test for cable conduits in the area of fibre optic installation according to ZTV TKNetz 40

Fibre optic cables stand for the digital future like no other telecommunications technology. So far, the expansion of fibre optic infrastructure in Germany has been slow, partly because the cost of laying the lines is relatively high compared to copper-based lines. In addition, technical...

Reading time: 7 min

Author: Dr. Johannes Hopster

DVGW G 469 Amendments July 2019

02. August 2021

DVGW G 469 Amendments July 2019

Technical rule – Technical standard DVGW G 469 (A) July 2019 Pressure testing procedures gas transmission/ gas distribution – The changes compared to DVGW G 469: 2010-06 summarised and explained. Why did changes have to be made at all? First and foremost, it is certainly clear to everyone...

Reading time: 11 min

Author: Bernd Esders

Basics of hydraulic pressure test – Head loss method according to W 400-2

Basics of hydraulic pressure test – Head loss method according to W 400-2

In the following explanations we try to clarify the problems of pressure tests. For complete training courses, we offer practical seminars on our test track in Haselünne. For hydraulic pressure test, we consider the head loss method procedures in detail. These are: The accelerated procedure for...

Reading time: 13 min

Author: Bernd Esders

Pressure test behind a regulator

02. February 2021

Pressure test behind a regulator

One of our customers was surprised about the measurement data of the smart memo behind a gas pressure regulator. The customer wondered about fluctuating pressure data that were inexplicably high for him. He was not used to these large fluctuations from measurements with other pressure measuring...

Reading time: 6 min

Author: Dr. Johannes Hopster

Esders devices under extreme conditions

04. December 2020

Esders devices under extreme conditions

I know it is hard to believe, but there are situations on construction sites that push our devices to their limits and beyond. These include attacks from bulldozers, sand burials, swimming courses or fire. In order to prepare our measuring devices in the best possible way for all forms of everyday...

Reading time: 10 min

Author: Lea Schwenen

German DVGW G 469 B 3 testing and G 459-1 service line connection

30. November 2020

German DVGW G 469 B 3 testing and G 459-1 service line connection

Gas service connections are often treated somewhat stepmotherly. From time immemorial, these have tended to be simple pressure and leakage tests, for which less investment was often made in equipment technology. But when you look at the hazards and what is most susceptible to faults, is what is...

Reading time: 9 min

Author: Bernd Esders

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