The lighting system is one of the branches of the power system of the offshore platform, which is directly related to the safety production of the platform and the quality of life of the staff. This paper briefly introduces the selection, installation method, lighting arrangement, system power supply requirements and control of the lighting system of the offshore platform.

CESP LED Explosion proof Lights for Drilling Platform

 

Part.1  How to select lighting fixtures for offshore platform

The protection level and explosion-proof level of the lamp housing shall be suitable for the installation site and shall meet the following requirements:

The minimum requirements for the protection level of indoor dry spaces should meet IP23;

• The minimum requirements for indoor large dripping spaces and mechanical damage hazard spaces shall meet IP34;
• The minimum requirements for ballast pump rooms, refrigerated rooms, galleys and laundry rooms should meet IP44;
• The minimum protection level for outdoor and open decks should meet IP55.
• When it is in the open air or exposed to rain and waves, the minimum protection level should meet IP56.

Positive pressure ventilation (Exp), flameproof (Ex d) and intrinsically safe (Ex "ia" or "ib") are available in Class 1 hazardous areas. Increased safety (Ex e), positive pressure ventilation (Exp), flameproof (Ex d) and intrinsically safe (Ex "ia" or "ib") are available in Class 2 hazardous areas.

Some marine lighting fixtures and explosion proof lights from CESP for you reference. or you can send the project requirement to us directly.

 

Part. 2 The type of lighting fixtures and installation

The types of lighting fixtures for offshore platforms can be divided into: fluorescent lamps, high pressure sodium lamps, metal halide lamps, emergency exit lamps, aircraft deck boundary lamps, windsock lamps, etc. Each type of lamps is used in different locations. The following mainly introduces fluorescent lamps and high pressure sodium lamps. , the installation of emergency exit lights.

1. Fluorescent lamps: embedded, pole-mounted, wall-mounted, ceiling-mounted, etc.; embedded spaces are used for indoor spaces with ceilings. The pole-mounted type is installed on the boundary of the platform, the wall-mounted type is installed on the firewall, and the hoisting type is installed in the indoor mechanical space.
2. High pressure sodium lamp: The high pressure sodium lamp on the platform is divided into flood light and flood light. The flood light is installed on the platform column with a height of 5.5~6 meters. The flood light mainly illuminates the interior of the platform. The floodlight should ensure that its movable part is within the illumination range required by the work, and the rotation is flexible and unobstructed, and the light is not obstructed. Flood lights are also installed on the border of the platform, mainly illuminating the sea surface.
3. The emergency exit light is the light fixture of the emergency lighting system. Installed at the door of the room, it is used to indicate the escape route and indicate the rapid evacuation of personnel.

 

Part.3 Illumination requirements for lighting fixtures

The number and location of lamps in each area depends on the average illuminance of the room. Different areas and rooms have different illuminance requirements. The average illuminance of each area on the platform is as follows:

Area	Normal lighting (average illuminance)
Staircase/passage area	100 Lux
Restrooms/toilets/changing rooms/other areas	100 Lux
material storage area	100 Lux
occupancy cabin	150 Lux
machinery spaces	150 Lux
Dining Room/Infirmary/Office/Control Room/Telegraph Room	200 Lux
kitchen	300 Lux
Frequency conversion room/electrician room/distribution room	300 Lux

 

Part.4  The layout of lighting fixtures

On the basis of the selected lighting fixture model, power and quantity, the cabin lighting fixtures can be arranged. While arranging, the environmental conditions of the cabin should be fully considered, and the main body should be illuminated evenly if possible. Due to the limited space in the cabin, in addition to lighting fixtures, there may be air conditioning vents, fire detectors, speakers, etc. on the ceiling. Therefore, the arrangement of lamps and lanterns must be carefully coordinated with the relevant professions. Make the lighting reasonable, beautiful and applicable as much as possible. When there is only one light in the cabin, it is generally arranged in the center, or close to the working position, and avoid placing it above the bed or in a position that may be severely blocked; when there are two or more lights in the cabin, it is In order to make the lighting of the whole room uniform, and considering the appearance of the cabin, the layout is often symmetrical. The arrangement of multiple lamps can be arranged in a right-angle or checkerboard arrangement as shown in the following figure:

The layout of other areas of the platform lighting fixtures should pay attention to the following aspects:

1. It should be ensured that there is sufficient lighting in places where frequent operations and maintenance are required.
2. The escape route, emergency escape and fire fighting equipment and other premises must have emergency temporary lighting.
3. The arrangement and installation position and height of the lamps should ensure that the lamps are easy to operate and maintain, avoid being arranged above the movable equipment, and do not affect the aisles and safety passages, and provide lighting for the platform to the maximum extent; lamps should not be arranged in the pipeline method. To avoid the gasket breaking and the medium in the pipe spraying to the lamp.
4. Emergency lighting should be arranged in the emergency equipment area so that the operation and maintenance of emergency equipment will not be affected when the emergency generator supplies power.
5. The light of the lamp is not affected by any obstacles.
6. The aircraft deck boundary lights and windsock lights shall ensure the safe take-off and landing of the helicopter on the offshore platform, and the arrangement and installation position shall comply with the relevant.
   

   

CESP Case: CNOOC - Oilfield & Offshore Lighting Engineering Project

 

Part.5 Lighting system power supply and control

Lighting can be divided into: normal lighting system, emergency lighting system, temporary emergency lighting system. The normal lighting switchboard shall not be placed in the same space as the emergency lighting switchboard. Except for personnel living spaces, the emergency light points in other spaces of the platform should be higher than at least 1/3 of the total number of light points in the room. Each lighting circuit shall be provided with overload and short circuit protection. Each lighting switchboard with a capacity greater than 16A should have no more than one last shunt power supply lamp.

The number of points of the last shunt-supplied lamps with a capacity less than or equal to 16A shall not exceed:

For circuits of 50V and below: 10 points

For 51~120V circuit: 14 points

For 121~250V circuit: 24 points

The power supply lamp head is close to the final shunt of the clustered cornice lighting, wall lamps, electric signs, etc. If the maximum working current does not exceed 10A, the lamp points supplied can be unlimited. The last branch of the lighting circuit should not supply power to electric heating and electrical equipment, but for small kitchen equipment (such as bread toasters, small mixers, coffee pots), small electric motors (such as desk fans, cabin fans, refrigerators) ), wardrobe heaters and the like may be excluded. For large machinery spaces, large galleys, passages (including entrances and exits), stairways leading to lifeboat decks and public spaces, the lighting is to be powered by at least two final branches for lighting. When any one of the routes is not powered, the other route should still be able to maintain the above necessary lighting.

The lighting system of the offshore platform directly affects the overall quality of the platform, so the lighting design must not only be meticulous, but also pay attention to methods, make overall arrangements, and follow specifications.