The Advantantage of using a compact DBB Valve

DBB - Benefits and advantages of a DBB assembly in oil and gas industry.

In the Oil/Gas industry, although it has become very common, the use of a compact Double Block & Bleed (DBB) valve for pressure energy isolation is still not applied or adopted across the board. I have experienced a few times wherein the use of a DBB valve for process isolation is more of an option rather than a design requirement.

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The most important facts of an own Valve Test Center

DBB - Profit from German engineering, technology, testing, manufactoring and assembly.

When I think back 20 years, I nearly cannot imagine how we were able to provide such high quality valves without the means of testing them in such an extensive way like we do this today.

I remember very well the time, when I started at AS-Schneider as a design engineer. Fire Safe Approvals and Fugitive Emission Testing (TA-Luft) had to be done outside the company on a third party test rig. There was no chance to do a pre-testing and it was always very exciting when the third party like TÜV was witnessing the tests. Well, most of the approvals were passed successfully, but I also remember some Type approvals were we failed at the first stage. The disappointment was great and we lost time with the re-design and the second try.

Today we are very glad to operate our TechCenter with 2 Fire Safe test rigs, a fully automated valve test bench, a climate chamber, etc. Once we started our TechCenter, it was so exciting for us to learn what our valves are able to withstand and where they have their limits.

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DBB Valves in severe service applications

DBB - Usage of DBB valves in severe applications like oil and gas, process and refinery.

Having worked on many projects in the past, it seemed that many piping engineers tend to stereotype the term “severe service” on their valve requirements.

In a given process or system, only few can be considered as such, but they are the ones that pose the greatest design challenge. Each type of valve (and there are many of them) has several parameters to consider.

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