Design & Selection
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Design & Selection
ISO 15848, TA-Luft and a new five-valve manifold
TA-Luft is well-known in the German and European processing industries as the guarantee for high quality stem sealings. But what guarantee do customers get from TA-Luft compliant Industrial Valves and what's behind the relatively new ISO 15848 standard? Markus Haffner (Franz Schneider GmbH) reports....
Tightness in gasketed flanged unions
In this article, ESA member Francisco Montero looks at the background and challenges in gasketed flanged unions. Also considered are new standards for calculating and testing in the USA, Germany and Europe....
Answers to fugitive emission problems
At the moment, the attention of standards is mainly concentrating on the sealing criteria. According to Thierry Ledauphin (R& D Manager at Latty International) other functional aspects of the sealing system should not be overlooked, such as easy manoeuvre, fire safe solution, chemical compatibility, no corrosion, without forgetting the needs on the field: the imperative of better and cheaper production which obliges the companies to optimise their maintenance and rationalise the various qualities of sealing products....
Cutting leaks from control valves
Limiting fugitive emissions from control valves is desirable for both environmental as well as economic reasons, explains Samson's Peter Scheermesser. A range of solutions is available, depending on the specific valve application....
DBB vs. DIB
Double block and bleed functionality has long been available, but the term is often incorrectly applied. Jeff Partridge explains all, and also suggests that sometimes double isolation and bleed might be a better alternative....
Emission control achievable with proper maintenance and selection
Emission control is an issue which remains in the spotlight for valve manufacturers and end users alike. With an increasing volume and diversity of legislation in place around the world, preventing emissions through correct product selection and appropriate maintenance has become a priority. Mr. Michael Adkins from Swagelok shares his views on this hot topic....
Expanded supply at Gasket International
Paolo Bergamini (CEO of Gasket International) discusses his company’s expanded range of supply....
Factory Practice on Latest Fugitive Emission Standard
The most widely used standards to detect fugitive emissions of valve packing are ISO15848-1 standard and API622 standard. The two standards are used to evaluate the fugitive emissions of valve packing, but their test conditions and evaluation methods are different, says George Gao, Neway Valve (Suzhou) Co. Ltd....
Innovative sealing solutions for LFE standards
Meeting low fugitive emissions (LFE) standards presents a difficult challenge in applications under harsh environmental conditions make reliability of a sealing system of paramount importance. Read on as Christophe Valdenaire discusses innovative sealing solutions that withstand extreme temperatures and pressures, and comply with stringent LFE standards....
Management considerations in choosing valves to curb fugitive emissions
In this article, Michael Adkins (Swagelok) presents possible solutions for fugitive emission control management for valve users. After a general introduction, the focus is shifted to LDAR programs, which are broadly used in US facilities and some supporting examples are given....
Minimising fugitive emissions: LNG best practice
Ask any LNG plant manager their number one priority, and the answer will be the same: safety. It is closely followed by – and linked to – further important priorities such as productivity and supply chain management. It is widely accepted that control valves play a critical role in each of these areas. After all, optimum valve performance is vital in the prevention of fugitive emissions, as well as maximising plant performance. By Tim Webb, Severn Glocon....
Oil and Gas Valve Sealing: Time for a rethink
Oil and gas exploration and production continues to push the boundaries of elastomer valve sealing performance as companies operate in more aggressive locations and downhole environments. Christophe Rodriguez believes recent advances in elastomer sealing technology will assist valve manufacturers in meeting these challenges. In this article, he reviews the key performance criteria for valve seals in oil and gas, before considering the implications for valve design and manufacture....
The development of effective fugitive emissions control for valves
This article discusses development and testing work to help reduce fugitive emissions of VOCs through valves. As restrictions tightened, the scope of the programme was widened to include the development of a new stem packing design. This packing was subsequently evaluated in the lab and during field trials....
Zero seat leakage tolerance: the benefits of reducing seating area
Reducing valve seats on in-body gate and check valves in pure water nuclear plant systems is a relatively simple procedure which can save nuclear utilities a substantial amount of personnel radiation dose and money, while contributing to a reduction in system voiding. By Curt R. Dupill, US Nuclear Sales Manager, Automatic Valve Corporation & Timothy Calvert, Valve Maintenance Supervisor/Outage Planner, First Energy, Davis Besse NPS...
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