PRV Support offers expert services on the Pressure Relief Valves and their applications in the heavy duty industries.
Customised training and expert support
on your pressure relief valves
Oil and gas
The company PRV SUPPORT has been established on the idea that safety is the business of all. However, how to make each actor accountable without the knowledge of security and the awareness of the risks incurred.
PRV SUPPORT responds to the training needs of employees of any company working on pressurized applications. Depending on the profiles, the training themes will be different but the objective will be the same: to make everyone aware of the importance of their role in the continuity of the chain of security.
Of course, it is all about cost. Beyond the security objectives, it is as important to master the way of implementing them. It is for this reason that PRV SUPPORT provides its expertise on the methods of sizing and selection of pressure relief valves, as well as the methods of installation and testing of these latter, in order to better control the acquisition costs and the costs of ownership.
Founder of PRV SUPPORT
The company PRV SUPPORT has been founded by David Alexandre in March 2018.
He has spent his whole career in the industrial valve industries, including sixteen years working for
two majors Pressure Relief Valves manufacturers.
He is a member of the following professional associations:
Address: PRV Support SAS
13 rue de l'érable
95540 Méry sur Oise
Tel: +33 (0)6 95 21 31 99 (available on Skype Enterprise & WhatsApp)
LinkedIn : fr.linkedin.com/company/prv-support
Your domestic representative is not far away from you:
PRV Support is a member of the following institutions:
The Oil & Gas Partnering Platform
The pressurised vessel and the obturator
As soon as the mankind was able to boil water to create steam, the requirement of control systems and safety(security) became an obvious fact.
The first cauldrons in terra-cotta were not by nature adequate for the boiling water. More than 3000 years ago, during the dynasty Shang (on 1600-1046 BC), emerge the first bronze cauldrons, with three (even four) feet and a simple cover.
In order to better control the steam generation in the cauldron, the Chinese had the idea 2000 years ago to use a hinged cover. This allowed to produce steam a (relatively) safer manner.
The direct load on the obturator
Early in the 14th, chemists began to use conical plugs, with later on the addition of a spring to act as a safety valve.
However, the first real safety valve appeared in 1680. In fact, Denis Papin (France, 1647-1712), installed in London from 1675 in order to follow the work of Robert Boyle (Ireland, 1627-1691) on the properties of the air, develops a steam engine. It happens to have all the attributes of a boiler, without bearing the name. It was called the Digester. It is equipped with a device that allows to control the pressure in a cylinder filled with water and exposed to the flame. The purpose of this one, whose adjustment was ensured by the choice of counterweight, was to ensure the exact cooking of the meats in the pot by maintaining the desired pressure. This device is, by its design, a counter-weight safety valve. This technology was still used in industries a few decades ago. It is now banned beyond 0.5 bar as it is possible for a third party to intervene on the setting in a fortuitous way.
In 1690, Denis Papin built the first steam engine in England by introducing the fluid under pressure into a cylinder with a sliding piston, thus recovering mechanical energy usable for industrial purposes. The story was on the move. Follow the steam engines of Thomas Savery (1698), Thomas Newcomen (1712) and finally that of James Watt (several evolutions between 1763 and 1788) which is one of the pillars of the industrial revolution. One of the last two copies in perfect condition is located in the city of Fumel (Dordogne, France).
In 1824, a young physicist named Sadi Carnot (France, 1796-1832) laid the groundwork for thermodynamics in his book "Reflections on the driving power of fire and on the machines to develop this power". William Thomson (England, 1824-1907), better known by the name of Lord Kelvin, will formally define the outlines. It is on these bases that the first calculations of safety valves were to be able to be seen.
The adjusting ring and the full lift
When dealing with the safety valve itself, one of the major revolutions was undoubtedly the invention of the concept of the accumulation chamber by Charles Ritchie (filing of the patent in Aberdeen on 2 March 1848, as a result of his work on the improvement steam locomotives). It is based on the expansive properties of the gases. The principle is as follows: When the pressure reaches the sealing limit of the range, the gas accumulates in a chamber formed between the seating area and a lip. This creates a second compression chamber (after the one in the nozzle) so that it increases the support surface under the disc to a point where this additional force helps to obtain a sudden and significant lift. This technical approach is taken up today through the spring-loaded safety valve adjustment ring type API STD 526. Sudden and significant lifting prevents the valve chattering phenomena at the same time as it preserves the nozzle and the disc. In fact, at the fastest and higher the disc rises, at the most it limits the phenomenon of erosion on the seating area due to the high velocity of the fluid when the two seats are close (beginning of opening). In addition, the quicker and higher is the lifting of the disc, at the fastest is the obtaining a significant flow favorable to the stability of the opening cycle. This is especially true for the steam. Here we understand the whole point of this innovation of the time of the first steam engines, where the contribution of the calories generated by the flame was probably difficult to control and therefore the cases of overpressure probably recurring.
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Foundation of some internationally known brands
PRESSURE RELIEF VALVE HISTORY
The industrial valvesare used in various shapes, in different applications, in different sizes and materials. Even though some valve types may seem technically and dimensionally basics, it is nonetheless essential to know how to select, use and repair them.
In fact every type of industrial valves:
PRV Support sets up personalised training according to the participants profiles. From the simple understanding of the terms used and the types of industrial valves to the sizings and selections of pressure relief devices on complex applications (dual phase process, corrosive fluids, different temperature types on the same service, etc.) through the installations and maintenance phases, each actor needs to master the requirements of his own job. What about the regulations and standards when they impose constraints that can have serious finacial consequences if they are not known and under control upstream the emission of the needs.
Without going so far as to talk about the risks control about industrial accidents, the simple fact of sizing, selecting, installing, using and maintaining valves has a significant impact on the proper functioning of Industrial equipment. Each actor is sensitised about the good performance of the equipment and the low impact on the environment. A valve organ may, if poorly selected, misused or poorly maintained, cause leakage, fugitive emissions and also unexpected unit shutdowns for safety reasons.
PRV SUPPORT offers theoretical and practical trainings. They can be implemented according the customer requirements and priorities. Several existing training modules allow to achieve the training sessions whatever the participant profils.
Sizing, operating, selection, storage, commissioning
Operating, storage, troubleshooting, maintenance
Fundamentals of the industrial valves (ref FT1)
Trainings examples. Please ask us in order to prepare a training program according to your qualitative and budgetary criteria.
This training program gives an overview of all the main aspects of the industrial valves. As such the participant will be able to understand and participate to any general discussions about the industrial valves (daily business purpose, understanding of other trainings at higher level, junior level, etc.).
Required level : junior
Fundamentals of the pressure relief valves (ref FT2)
This training allows to understand the main wordings and requisitions. The participant will be able to understand an intermediate level discussion (exchange with specialists, particpate to higher level trainings, etc.).
Required level : junior + training FT1 understood
Sizing and selection of the pressure relief valves (ref FT3)
This training allows to understand ho to size and select, which are the difficulties and traps and how to by-pass the obstacles. Above all it allows the understand the stakes of the safety on site, as well as to know how to select the best technico-economical solutions according the needs.
Required level : junior + trainings FT1 + FT2 understood
Maintenance of the pressure relief valves (ref FP1)
A good maintenance operation is not to only test a pressure relief valve without a thorough inspection of all components. This is a crucial operation, not only to prevent the risk of incident on site, but also to anticipate the supply of certain components for a future service.
This also makes it possible to check whether the valve has been subjected to inappropriate conditions in order to allow the proposal for corrective actions.
The practical training is set according to the customer needs : cryogenics service, oxygen service, steam service, etc.
Required level : Junior + theoretical trainings FT1 & FT2 understood
CONSULTING / ASSISTANCE
In general, PRV Support accompanies you in the process of determining and supplying your pressure relief valves.
The expertise after an incident (even light) or a disaster requires professional skills that cannot be improvised.
Our years of experience, both with the design offices and the service centres and yards, allow us to have an overall view of the most frequent errors associated with the use of pressure relief valves. Of course, it all starts with a perfect knowledge of the products in their applications.
PRV Support accompanies the various players in the industrial sectors and delivers diversified services both in France and internationally. The know-how and experience of PRV Support enables us to meet the needs of risk assessment and expertise after an event related to the use of pressure relief valves.
PRV Support is the local partner of global companies working with the same values: strong and recognised expertise and commitments achievement.
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