EX-equipment is electrical equipment certified to safely operate in explosive atmospheres. EX-certified equipment will not cause an explosion, even if the equipment fails. Securing the system usually means encapsulating components, but even filling components with sand or oil or even an inert gas with an over pressure are used.
Offshore rigs on the Norwegian continental shelf use NORSOK classification of equipment. NORSOK is a cooperation between the industry and Norwegian government and is supervised by Standard Norge.
An offshore rig or an offshore production plant are commonly divided into Hazardous Area Zones 1, 2 and 3, depending on the explosion hazard. Equipment used in these areas has to be certified for use in the current zone, or higher. Lighting, electrical equipment and accumulators all have to be certified. The certificate itself are issued by e.g. DNV GL or Lloyds. Alternatively, equipment may be ATX-certified, i.e. it is acquired from a retailer that are licensed to certify its own equipment.
Stabo AS are agents for Orga BV in Norway. Orga is a Dutch company with more than 40 years of experience on the Norwegian continental shelf. Besides exceptional service and maintenance, Orga is one of the most competent producers of EX-certified equipment for offshore installations. Orga also hold the important ATX-certificate, enabling production and certification of their own specialty equipment.
Being the Norwegian agents for Orga BV, we offer customized and cost-efficient solutions. By reaching out to us at an early stage in your process, we can offer insights on equipment and solutions, saving your project both time and money. Contact us for a quote on spare parts for Orga equipment and accessories.
Navaid, Helideck lights, Flood lights and aeronautical obstruction lights
Regulatory compliance and other considerations needs to be taken when lighting up an offshore rig or installation. The highest points should be equipped with obstruction lights; lamps communicating the structure of an installation to airplane and helicopter traffic. These obstruction lights are often mounted in inaccessible places, making maintenance difficult. Orgas produce maintenance free aeronautical obstacle lighting.
Lights are also required to be installed on ‘cold installations’; installations no longer in use but not removed. We can deliver solutions with 24 months maintenance free use with no external power supply.
A complete navaid system consists of ‘one beacon in each corner’ and should make the offshore installation visible to aeronautical and nautical vessels. If the distance between the corner beacon are over a defined length, additional lighting is required. The lights signal ‘U’ in morse code (on the Norwegian continental shelf). Different rules apply to different areas. On the Norwegian continental shelf, 10 nautical miles visibility is required. The navaid solutions provided by Orga are unique in that the same cable are used for both the signal and power, streamlining installation and maintenance.
For helidecks, perimeter lighting is used in order to highlight the landing circle (C lights) and the H landing marker (H lights). On the Norwegian continental shelf, using flood lights to illuminate the Center and H is still permitted, but in most areas, it is required to follow CAP437 standards. From a safety perspective, we highly recommend following CAP437 on new helideck installations, or when renovating or upgrading old installations.
Through Orga we deliver diode lighting systems for perimeter-, C- and H lights. Diodes are superior to conventional lighting when it comes to durability and energy consumption. These systems can be delivered with either one, or two, control panels – and can be controlled by photo cells. The system Orga delivers are constructed so that it can be mounted on steel and aluminium rigs, with or without safety nets. Staubo recommend combining helideck upgrades with other maintenance work. Orga will send a supervisor to oversee installation and it is therefore advantageous that the project is well planned in advance.
EX Battery Cases
Batteries are often a necessity in offshore installations since many systems are not allowed to fail. These batteries are usually encapsulated since they are often located in explosion hazardous areas; the casing should also protect the battery from harsh marine environments. Sometimes referred to as EX-batteries, these batteries with its own termination, are custom fitted to EX battery cases. Orga delivers both battery cases certified for zone 1 and 2 and can be delivered in stainless- or galvanized steel. The cases are internally covered with an anti-static PVC material and can withstand temperatures from -40°C to +55°C.