Improved isolation of fluid systems for maintenance work

Infographic about DBB Valves in a Bypass Application.

Customer listening is an essential topic at AS-Schneider. AS-Schneider technicians often visit customers together with their sales colleagues to discuss daily challenges, issues and success stories. One point we came across at a customer visit of the gas storage plant “Jemgum” (astora GmbH & Co. KG) in northern Germany is how to take care of maintenance and repair operations in technical plants. In this article, we would like to describe how DBB Valves used in a bypass application provide a solution that can help you saving maintenance and replacement costs.

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YouTube: Upgrade your existing Single Isolate Ball Valve with a DBB Valve

Upgrade your existing Single Isolate Ball Valve with a Double Block & Bleed Valve DBB.

It is very easy to upgrade your existing Single Isolate Ball Valve installation. By simply using a Double Block and Bleed (DBB) Valve with Face-to-Face and End-to-End dimensions acc. to ASME B16.10, which is a specification standardises those dimensions.

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How to install a DBB Valve where a single isolation ball valve was previously installed?

DBB – How to install DBB Valves

For the most part, most engineers will start out by cutting the pipe in order to correct the dimension and weld new flanges on it. However, this daunting process can be avoided only if the DBB Valves conform to the ASME B16.10 End-to-End Dimensions. In other words, the DBB valves have to be manufactured or designed according to the ASME B16.10 Standard.

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ASME B16.10 – Exploring why it matters to DBB Valves

DBB - Installation and maintenance of compact valves in the gas industry.

Ever since 1922, ASME (American Society of Mechanical Engineers) has been defining pipeline safety upon demand from both industry and government. One of their standards has to do with face-to-face as well as end-to-end dimensions of straightway valves, centre-to-face and centre-to-end dimensions of angle valves. In this informative post, our primary focus will be on ASME B16.10 industrial valves.

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Replace a single ball valve by a Double Block & Bleed

DBB - Safe solution couse valve meet the face-to-face requirements of ASME B16.10.

When creating the design specification for our Taurus Series we came along the point ‘face to face’ dimensions. Immediately some colleague said “ASME B16.10 and EN 558 – but same length as a single ball valves for the Taurus DBB with 2 balls and a bleed in between?”

Well, we discussed that there might be a possibility to achieve this goal and we listed some values and benefits we could offer to our customers with such a short face to face dimension:

The major benefit would be that the new Double Block & Bleed (DBB) Pipeline Ball Valve (Taurus-Series) has the same face-to-face dimension as a single block ball valve. The length of a single block ball valve is specified in ASME B16.10 and APl 6D. As a consequence the valve can easily be installed into an existing pipeline without the need for any re-work on the pipeline.

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