FEATURE WHEN IS SAFE SAFE?
its pressure relief and explosion safety devices are designed in such a manner, that ensures a high degree of manipulation- proof safety is provided. For example, screw connections have been replaced by permanent
riveted joints and screws are designed to be self-locking and undetachable.
These design features are essential
for complex components such as flameless venting devices which are mostly used indoors, but always in
locations where a relief into the surroundings, for example through
rupture discs, would be unacceptable. If the arresting device of these flameless
Industrial Compliance finds out what needs to be considered, beyond the usual characteristics, when selecting explosion safety devices
I the KSt
t is common knowledge that the safety characteristics of products (for example, ) and the plant-specific
value or Pmax
marginal conditions (volume/design strength) will influence the selection of the proper safety device. Additionally, more plant engineers and operators are now placing an emphasis on a proper certification and marking of safety devices as well as system components. A largely ignored aspect is the tamper- protection of protective systems and
safety devices. In the recent past, REMBE engineers have been increasingly detecting evidence of such issues during on-site plant inspections. It has, for example, found protective systems that have disabled, electronic signalling and warning devices have been bypassed, and mechanical elements have been secured with an insufficient number of connecting elements and screws. The reasons for this are complex. For this reason REMBE now ensures that
LED floodlights for Zone 1 applications
R. STAHL has launched a new range of flexible, energy-efficient LED floodlights for use in hazardous areas. The 6125 series (for Zone 1) and 6525 series (for Zone 2) floodlights achieve luminous flux of 21,000 lm
in versions with 210 W power consumption and 12,000 lm in 120 W models. With a luminaire efficiency of 100 lm/W, the LED floodlights are said to be more efficient than conventional HID lights and also require less maintenance. TIR lenses minimise scattered light and glare effects and enable light distribution focussed on angles of
10°, 40° or 120°. This makes them suitable for both spot and wide-angle lighting, as well as for installation as pendant lights. The lens panel modules are equipped with hinges for easy installation, maintenance and repair of the removable components. Even under extreme conditions, the service life of the LED floodlights is specified at 50,000 hours of operation at maximum ambient temperatures. They are able to withstand challenging environments over long periods – for example in the chemical industry or in oil and gas extraction at temperatures of between -40°C and +60°C. For some applications, such as general lighting in production and storage facilities in the food industry,
the LED floodlights can also be ordered with scatter protection for the glass front panel. The enclosures provide IP66/67 ingress protection and have high shock and impact resistance (IK10). The floodlights are available in either powder-coated steel sheet or stainless steel.
www.stahl-explorers.com
| INDUSTRIAL COMPLIANCE
The Q-Rohr flameless venting device from REMBE is riveted, not bolted
venting devices fails or is not properly fixed it could have a devastating effect on the immediate environment, which would then be unprotected against the flames and pressure of the explosion. "This is precisely why the Q-Rohr, the
original flameless venting device from REMBE, is riveted and not bolted,” said Stefan Penno, managing director of REMBE GmbH. “Screws can become loose or they can be easily loosened. With a rivet, both described scenarios become very unlikely. The trend towards the use of signals and sensors, and therefore the utilisation of as many electrical and as few as possible mechanical safety devices, is slowly but surely reversing. This is solely and exclusively attributable to the reliability of mechanical systems, which can never be fully guaranteed with electronic components.” The Q-Rohr from REMBE offers even
more features. The pressure-bearing elements are flexibly interconnected which enables them to absorb the explosion pressure wave. "During our daily work, we have already seen many imitations of flameless venting devices which were rigidly welded. This resulted in the device tearing open at the welding seams when the pressure relief occured.” Penno compares it with the wings on an airplane. “If they were rigidly welded to the fuselage, they would break off in case of turbulence. But because they are flexibly riveted, they can absorb pressure shocks and withstand extreme loads very easy," he said.
REMBE
www.rembe.co.uk T: 01234 783366
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28
