[Johannesburg, 26 January 2018]: Now available in Southern Africa through Energas Technologies, a leading supplier of high-end and specialised equipment to the oil and gas industries in the region, is a new, innovative range of detonation flame arresters from leading US-based manufacturer, Protectoseal, which sets a new era with its ability to act as a deflagration and detonation flame arrester simultaneously.
Technology is developing fast, and while innovation is taking centre stage, versatility remains right up on the checklists of both manufacturers and end users alike. With that in mind, the new Protectoseal Series 26000E / 36000E bi-directional overdriven / unstable detonation arresters, now available in southern Africa through Energas Technologies, effective August 2017, usher in a new era in flame arrester technology with their versatility, allowing them to withstand both deflagration and detonation flame fronts.
Deflagration and detonation are two forms of combustion. If the combustion process propagates outward at subsonic speeds and pressures less than 0,5 bar, it’s a deflagration. If the explosion moves outward at or above the speed of sound (343 m/s), it’s a detonation. On the other hand, a detonation is a dramatic, often destructive form of an explosion. Detonation is divided into two types: stable detonation and unstable detonation. Stable detonation is characterised by the speed of sound, while unstable detonation is characterised by supersonic speed in excess of the speed of sound and up to 2 000 m/s with significant overpressure of up to 40 bar. In piping applications, selecting the right flame arrester – whether for deflagration or detonation – often involves the trouble of determining the probable type of combustion, location and other factors.
“The beauty of our new Series 26000E / 36000E bi-directional overdriven / unstable detonation arresters is that the flow and pressure drop performance for these units are extremely competitive compared to other manufacturers’ devices,” says Lavenda Sekwadi, Process Engineer at Energas.
“Protectoseal’s Series 26000E / 36000E detonation flame arresters are designed to withstand deflagrations, as well as stable detonations overdriven/ unstable detonations. These arresters are bi-directional, capable of stopping a flame or detonation approaching from either direction of a piping system,” adds Sekwadi. Available in sizes from 2 inches (DN50) to 12 inches (DN300), the new range has a maximum operating pressure of 1,22 bar and maximum operating temperature of 60 ⁰C.
Series 26000E / 36000E in detail
The Series 26000E / 36000E detonation flame arrester designs utilise improved-flow, crimped metal flame arrester elements. The range comes with high-strength, welded housing, both hydrostatically and pneumatically tested.
Protectoseal’s Series 26000E / 36000E detonation arresters are suitable for short time burn when additional external safety equipment is properly used in accordance with the requirements of EN ISO 16852. Short time burn arresters are equipped with two half-inch FNPT taps for the installation of ATEX-approved, intrinsically-safe temperature probe assemblies. The temperature probes are used to detect a burn on the flame arrester element and send a signal that will trigger emergency functions within a burning time of 50% of the specified burning time.
Stable vs. unstable detonation arresters
Unstable detonation arresters are required for safety in piping containing flammable vapours, as encountered in vapour recovery or manifolded tank systems. “A confined flame front will accelerate from the point of ignition, quickly reaching the speed of sound in the pipe run. During the unavoidable transition period from subsonic to supersonic speeds, flame front pressures and velocities are far greater than before or after the transition (an unstable detonation),” explains Sekwadi.
Devices approved under ISO 16852 as “stable detonation arresters” have not been tested against the severe mechanical and thermal effects of multiple unstable detonations. The use of stable detonation arresters is based on the premise that, firstly, it is unlikely that the unavoidable high pressure and velocity transition will occur as the flame front reaches the detonation arrester and, secondly, all of the independent safety systems required to be installed when stable detonation arresters are used will function properly.
About Energas Technologies:
Energas Technologies has been a leading supplier of high-end and specialised equipment to the oil and gas industries in Southern Africa since 2001 and is the distributor for Mokveld in South Africa.
The company’s core focus is to support and supply equipment to the natural gas industry and its products find application from the gas well, through the distribution network right up until the end user. Applications include, next to the Mokveld axial valves, pressure reduction and metering stations, pipeline ball valves, HDPE pipes and fittings, pig launching and receiving stations to domestic metering and regulating units. Energas can provide complete skid-mounted high pressure reduction and metering stations with gas-fired or electric heaters.
Energas Technologies offers a range of new products from its supplier, HTT energy GmbH in Germany. Products include fired heaters, indirect heating and cooling units from -80°C to 400 °C, and heat recovery products.
Energas’ secondary focus is on liquid storage tank protection equipment, such as conservation vents, flame arresters and emergency vents. Its products, such as valves, filters, flange insulating kits and process heaters, also find application in other industries, such as liquid pipelines, petrochemical and chemical industries.
Energas Technologies is a member of Southern African Gas Association NPC, is 26% black owned and recently obtained its ISO 9001 accreditation.
[Johannesburg, 6 February 2018]: In line with international standards, thermoplastic piping specialist, Plasti-Tech has introduced high-density polyethylene stub ends labelled with a Lynx laser printer using invisible laser-radiation. Plasti-Tech becomes the first supplier to offer HDPE butt ends with this sort of labelling in South Africa, moving away from the conventional white marker approach.
Highlighting the significance of traceability and accountability in the manufacture of stub ends, Plasti-Tech managing member Brad Chamont states that the local thermoplastic piping company has become the first supplier in South Africa to offer high-density polyethylene (HDPE PE100) stub ends labelled by means of a Lynx laser printer which utilises laser-radiation.
He highlights the worrying lack of traceability in the market for HDPE stub ends in South Africa, owing to the fact that there is no identification and marking tools for these products. This creates room for manufacturers to turn a blind eye on the quality of their products, bearing in mind that there is no traceability and, subsequently lack of accountability for failures that may occur as a result of installing poor quality HDPE fittings.
Chamont highlights that the importance of labelling stub ends using the Lynx laser machine is that the manufacturer’s mark, size and pressure rating markings are permanently visible, and these cannot be tampered with without damaging the butt ends. This helps holding manufacturers accountable for the quality they produce.
“The labelling method currently being used across the local market is a white marker. The obvious shortcoming of this approach is that this can be rubbed off during regular handling of the butt ends,” says Chamont.
Internationally, the European Standards Association compels that manufacturer names and fittings information be clearly marked on all HDPE fittings. Barcodes also form part of the standards to facilitate easy of traceability. In line with these international standards, the Installation and Fabrication Plastics Pipes Association (IFPA) is, in the next few months, scheduled to pass a regulation that compels labelling of stub ends using permanent markings such as the Lynx laser printer locally. Chamont is confident that Plasti-Tech’s labelling model will conform to the IFPA standards.
Plasti-Tech has been in the business of supplying stub ends for the past four years. In line with its best-practice approach, the company engaged the services of a local manufacturer that has agreed to manufacture and label the stub ends using the Lynx laser printer. These are available in sizes of between 50 mm and 355 mm in diameter with diverse pressure classes. “The IFPA has requested suppliers to have manufacturers’ names and all the necessary identifiable markings regarding the size pressure and STR,” explains Chamont.
He further explains that these standards are very crucial, bearing in mind the criticality of stub ends in applications they are used. Stub ends form parts of a mechanical joints that comprise two components: namely, the stub end, which essentially is a short length of pipe which has one end that is flared outwards and the other prepared to be welded to a pipe of the same thermoplastic material and of a similar wall thickness, as well as the lap joint flange, which is a ring backing flange.
The combination of stub ends and backing flanges is an alternative to the use of a conventional pipe to pipe butt-weld. Typical applications include slurry pipelines where sections of the pipeline can be easily removed and replaced in sections due to the stub and flange mechanical connection.
“Once pipes are welded, you can’t remove sections or repair them. With a stub and flange system, the stub ends are bolted together to join pipe lengths. So, basically a stub end is a mechanical connection of an HDPE pipe,” concludes Chamont.
Plasti-Tech Piping Systems contact:
Tel: +27 (0) 11 609 5511
MoonDawn Media & Communications
Hydraform helps Free State community meet sustainable development goals
[Johannesburg, 24 January 2018]: As part of its objective to support the Naledi Village, settled at the Rustlers Valley Farm in Ficksburg, Eastern Free State, in pursuing a holistic approach to the development of a sustainable community through eco-farming, the Earthrise Trust also acquired a Hydraform blockmaking machine to help the community self-build the much-needed houses.
[Johannesburg, 12 February 2018]: Skills and knowledge are the motivating force of the growth of any business. They have become even more so given the increasing pace of technological advancement in the workplace. On the back of that understanding, Monitech, a South African industry leader in mining safety and monitoring solutions, views skill building as a device to improve the efficacy and contribution of its personnel to overall production of its customers.
To have skilled personnel is every company’s key objective to ensure that any skills gaps that its customers may experience at any time are addressed timeously to avoid unnecessary production losses, explains Jarrod Hassett, CEO of, Monitech. Consequently, Monitech – as a leading mining safety and monitoring solutions provider – has always placed a major priority on developing its skills base.
Resource-saving technologies are more in demand than ever before. The Wirtgen cold recycling process has been proving its credentials for many years – and already meets the demands of tomorrow.
Roads that are subjected to continuous and heavy traffic often show signs of damage that extend down to the road base. To eliminate this damage, the entire road needs structural rehabilitation. Full re-use of the milled material as well as its cost-effective treatment make cold recycling with foamed bitumen – a process pioneered and decisively shaped by Wirtgen over the past 30 years – environmentally friendly and economical.
Camps Bay Drive is a major scenic route within the City of Cape Town and provides access to Camps Bay and Hout Bay. Based on the project brief and geometric analysis, Camps Bay Drive required widening to safely accommodate the high volumes of tourists and MyCiti bus traffic. In order to minimize the impact on traffic, the design brief targeted construction outside the summer peak tourist season and also required investigation into shortened construction periods. The key role was played by Wirtgen cold recycling technologies. In action: the mobile cold recycling mixing plant KMA 200.
[Johannesburg, 9 November 2017]: Giba Business Park, a unique development set in the Giba Valley just outside Westmead in KwaZulu Natal, has developed its facilities for a variety of its successful businesses using innovative Hydraform block making technology. The Hydraform technology has since proved to be the ideal solution for Giba, not only from a cost perspective, but more importantly in meeting its sustainable ‘green’ business practices.
Following the recent launch of its Kleemann MS 703 EVO screen, Wirtgen SA is expanding its tried-and-tested Kleemann MOBISCREEN EVO series available for the local market with the arrival oof the new MOBISCREEN MS 953 EVO classifying screen in South Africa. Having recently rolled off the Kleemann production line in Germany to make its official international debut at the SteinExpo trade fair in Homberg from August 30 to September 2, the new MS 953 EVO screen made its first appearance in South Africa on September 15. The media launch was arranged by MoonDawn Media & Communications.
[Johannesburg, 05 August 2017]: Tight working areas are the order of the day in Mburg Mini Plant’s line of work, and to prevail over space-constrained jobsites, the Western Cape-based company recently took delivery of a 3 t Kubota U30-6 mini-excavator from Smith Power Equipment (SPE), South African importers and distributors of leading global specialist machinery, turf maintenance equipment and off-road vehicles.