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.

 

Marine Lighting - Explosion Proof Floodlight - Class I Division 2 - 40W to 200W

 

 

Marine Lighting - Anti-Corrosion & Anti-Explosionsive Light - UL Listed For Marine

 

 

Marine Lighting - Explosion Proof Fluorescent Lamp Replacement - Zone 1 Zone 2

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:

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.

Marine Grade Explosion proof LED Flood Light |  Class 1 Division 2 Light | Anti-Corrosion

CESP marine-grade LED lighting fixtures, through electrophoresis technology, are coated with a non-metallic paint-like coating on the surface of the lamp body, which makes the appearance of the lamp flat, smooth, corrosion-resistant and impact-resistant. Then, apply multiple coats of marine anti-corrosion paint to enhance corrosion resistance. In addition, the mounting brackets and accessories are made of 316 stainless steel to protect the lamps and lanterns from long-term harsh salt water and atmospheric corrosion in the marine environment.

Application:

• Applies to hazardous locations of Class I, Division 2 with explosive gas atmosphere.
• Applies to marine locations, non-recessed outside type (salt water).

Warning：

CUL for Hazloc:

• SUITABLE FOR WET LOCATIONS;
• THIS LUMINAIRE IS ACCEPTABLE FOR OPERATION IN AMBIENT CONDITIONS NOT EXCEEDING 40°C;
• FOR SUPPLY CONNECTION, USE WIRES RATED FOR AT LEAST90°C;
• NO SERVICEABLE PARTS” OR “NO USER SERVICEABLE PARTS. DO NOT OPEN FOR CLEANING.;
• CAUTION - ″TO REDUCE THE RISK OF IGNITION OF HAZARDOUS ATMOSPHERES, DISCONNECT THE LUMINAIRE FROM THE SUPPLY CIRCUIT BEFORE OPENING. KEEP TIGHTLY CLOSED WHEN IN OPERATION.″;
• THIS PRODUCT MUST BE INSTALLED IN ACCORDANCE WITH THE APPLICABLE INSTALLATION CODE BY A PERSON FAMILIAR WITH THE CONSTRUCTION AND OPERATION OF THE PRODUCT AND THE HAZARDS INVOLVED;
• “CAUTION – RISK OF SHOCK” and “DISCONNECT POWER BEFORE SERVICING”.

UL for marine locations:

• OUTSIDE TYPE or OUTSIDE TYPE (SALT WATER);

Marine Lighting | Corrosion Prevention | Explosion Prevention |  Zone 1 Zone 21 | 100W 120W 150W 180W 200W |

CESP marine-grade lights comply with China Classification Society (CCS) standards and have obtained UL1598A marine certificate. They can be used for the most demanding exterior lighting marine environments, including sea bridges, offshore drilling platforms, ships, seaside refineries, seaside shipyards, docks, or other acid rain, seawater and salt spray corrosive environments.

Product process:

CESP marine-grade LED lighting fixtures, through electrophoresis technology, are coated with a non-metallic paint-like coating on the surface of the lamp body, which makes the appearance of the lamp flat, smooth, corrosion-resistant and impact-resistant. Then, apply multiple coats of marine anti-corrosion paint to enhance corrosion resistance. In addition, the mounting brackets and accessories are made of 304 stainless steel to protect the lamps and lanterns from long-term harsh salt water and atmospheric corrosion in the marine environment.

Remark: Electrophoresis (EP) is the abbreviation of electrophoresis, which refers to the phenomenon in which charged particles move toward electrodes with opposite electrical properties under the action of an electric field. The technology that uses charged particles to move at different speeds in an electric field to achieve separation is called electrophoresis.

Explosion-proof standard:

Applies to hazardous locations of Zone 1 and Zone2 with explosive gas atmosphere, and hazardous locations of Zone 21 and Zone22 with explosive dust atmosphere.

ATEX: EN IEC 60079-0-2018; EN 60079-1-2014; EN 60079-28-2015; EN 60079-31-2014;
IECEx: IEC 60079-0-2017; IEC 60079-1-2014; IEC 60079-28-2015; IEC 60079-31-2013;

IECEx & ATEX :

• “CAUTION-USEFASTENER WITH YIELD STRESS ≥ 640 MPa”；
• “WARNING – DO NOT OPEN WHEN ENERGIZED”；
• “WARNING – DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE IS PRESENT”；
• “WARNING – ONLY USE CABLES SUITABLE FOR 85°C”；
• " WARNING - DETAILED TEMPERATURE CLASS - SEE INSTRUCTIONS”；
• “THE FLAMPROOF JOINTS ARE NOT INTENDED TO BE REPAIRED”;
• End user shall use certified cable gland or conduit with suitable type of protection for final installation purpose；
• External earthing wire shall be connected when used and the cross-sectional areashall be more than 4mm2 or 10AWG；
• Under rating condition, maximum temperature on the luminaire’s shell shall not be higher than 130℃ for T4.Temperature at cable inlet shall not be higher than allowable limit of the cable applied, to ensure the cable operation normally. The branch point is 83.6℃ and cable entry point is 69.4℃

1 Scope

This standard specifies the requirements for the classification, type, size, material, color, use and management of safety signs for mining products.

This standard applies to mining products that have been included in the management of safety signs and have obtained safety signs.

2 Terms and Definitions

The following terms and definitions apply to this standard.

2.1 Mining Products

The general term for equipment, materials, and instruments used in mines.

2.2 Mining Products Safety Label

Graphical and numerical codes for safety signs for mining products.

3 General requirements

3.1 The mining product safety sign management system is a mandatory management system for mining products involving workplace safety and worker health. All mining products included in the safety sign management can only be obtained after obtaining the mining product safety sign. production, sale and use.

3.2 The safety mark of mining products is a certificate that confirms that the mining products conform to national standards and industry standards, that production units are permitted to produce and sell, and that users purchase and use them.

3.3 The mining product safety sign consists of two parts: the mining product safety sign certificate and the mining product safety sign.

3.4 Mining product safety signs and logos (hereinafter referred to as "logos") are special signs that indicate that mining products comply with national standards, industry standards and relevant regulations on mine safety production.

For the production of mining products that are included in the management of safety signs, the signs can only be used after obtaining the safety signs of mining products.

3.5 Products that have obtained safety signs for mining products can only be sold by the production unit after the label is applied, and purchased and used by the user unit.

4 Identification Types

The identification is divided into safety signs for coal mine products and safety signs for metal and non-metal mine products, and there are standard and non-standard types.

4.1 Coal mine product safety signs

The standard identification is a hexagonal frame with the Chinese Pinyin abbreviation "MA", which means "coal safety". The frame line indicates that the scope of coal mines in the country is applicable, and the digital code is the safety sign number, as shown in Figure 1.

4.2 Safety signs for metal and non-metal mine products

The standard identification is a hexagonal frame with the Chinese Pinyin abbreviation "KA", meaning "mine safety", the frame line indicates the scope of the national metal and non-metallic mines, and the digital code is the safety sign number, as shown in Figure 2. 

5  Identification graphics and parameters

5.1 Standard identification

5.1.1 The standard logo graphics and parameters are shown in Figure 3 and Figure 4.

5.1.2 There are five specifications for the standard type identification, and the ratio of each specification size to the marked size in Figure 3 or Figure 4 is shown in Table 1.

5.1.3 The digital code (safety sign number) is marked below the hexagonal frame, at the center of the sign.

5.1.4 The standard logo is a yellow base plate, and the frame and "MA" and "KA" are black.

5.2 Non-standard identification

When it is inconvenient to use standard logos, non-standard logos can be applied to products by means of printing, molding, branding, etc. The position of the digital code, graphic size, color and whether to use a hexagonal frame can be determined according to specific circumstances.

6 Identify other requirements

6.1 Marking material

Standard signs should be made of materials permitted by mine safety, generally brass or stainless steel.

6.2 Identifying the surface quality

The identification should be clear and free of burrs.

7 Use of the logo

7.1 The logo should be applied to the obvious position of the outer body of the product, and the selected specifications should be compatible with the overall dimensions of the product.

7.2 For cables, conveyor belts, pipes, air ducts (cloth) and other products, the distance between the markings shall not be greater than 10 m, and there shall be no less than one marking in the minimum use unit of the product.

7.3 If the logo cannot be applied on the product body, the logo should be applied on the smallest package of the product.

7.4 Mining products that have obtained safety signs shall be marked before leaving the factory; imported mining products that have obtained safety signs in batches shall be marked before the products are delivered for use.

8 Management of logos

8.1 The labels shall be uniformly managed by the state-authorized mining product safety label review and issuance agencies.

8.2 For non-standard signs, the production unit that has obtained the safety sign shall apply to the state-authorized mining product safety sign review and issuance agency, and can only be used after confirmation and filing.

8.3 Mining products managed by Vanner Safety Signs shall not use the signs without obtaining the safety signs of mining products.

This explosion proof work light is Ex d type, 30 watt can replace to the traditional fluorescent lamps, 360 beam angle of optics design, rated for Zone 1&21, Zone 2 &22, and it's ideal for general work activities in hazardous location requiring explosion proof protection. In addition, this hand light’s lighting effects are particular good in the horizontal and vertical plane, no glare, no flicker, to improve the safety of the working at night.

Part 1: General floor plan

1. Class A and B workshops and warehouses with explosion hazard should be set up independently, and should be open or semi-open, and the load-bearing structure should be reinforced concrete or steel frame, bent frame structure.

2. The layout of the factory building with the danger of explosion should preferably be rectangular, which should be perpendicular to the dominant wind direction or the included angle should not be less than 45°, so as to effectively use the wind through the hall to disperse the explosive gas.

3. The explosion-proof workshop should be set up separately. If it must be adjacent to the non-explosion-proof workshop, it can only be adjacent to one side, and the two should be separated by a firewall or an explosion-proof wall. There should be no direct communication between two adjacent workshops to avoid the impact of explosion shock waves.

Part. 2: Plane and Spatial Arrangement

1. Main control room and sub-control room

1) The general control room of Class A and B workshops with explosion hazard shall be set up independently.

2) The sub-control rooms of Class A and B workshops with explosion hazard should be set up independently. When set adjacent to the outer wall, a fire partition wall with a fire resistance rating of not less than 3.00h should be used to separate them from other parts.

2. Parts with explosion hazard

1) Class A and B production sites with explosion hazard should be arranged near the pressure relief facilities near the outer wall of the single-storey factory building or the pressure relief facilities on the top floor of the multi-storey factory building near the outer wall.

2) The equipment with the danger of explosion should avoid the main load-bearing components such as beams and columns in the workshop.

3) Protective measures such as door buckets should be installed in the stairwells, outdoor stairs in the explosion-hazardous area, or the connection between the explosion-hazardous area and the adjacent area. The partition wall of the door bucket should be a fire partition wall with a fire resistance rating of not less than 2.00h, and the door should be a Class A fire door and should be staggered from the door of the stairwell.

3. Plants that emit flammable gas and flammable vapor

1) For Class A workshops that emit flammable gas and flammable vapor lighter than the air, light roof panels should be used as the pressure relief area. The ceiling should be as flat as possible without dead ends, and the upper space of the workshop should be well ventilated.

2) Class A workshops that emit flammable gases and flammable vapors heavier than air and Class B workshops that have the danger of dust and fiber explosion shall meet the following requirements:

A non-sparking ground should be used. When using insulating material as the overall surface layer, anti-static measures should be taken.

For workshops that emit combustible dust and fibers, the inner surface should be flat, smooth and easy to clean.

It is not advisable to set trenches in the workshop. When it is really necessary, the cover should be tight. The trenches should take effective measures to prevent the accumulation of combustible gas, combustible vapor, dust and fibers in the trenches, and should be sealed with fireproof materials at the connection with the adjacent workshop.

4. Plants and warehouses that use, produce or store Class A, B and C liquids

1) For workshops that use and produce Class A, B and C liquids, the pipes and trenches should not be connected with those of the adjacent workshops, and oil separation facilities should be set up in the sewers.

2) Class A, B, and C liquid warehouses should be equipped with facilities to prevent liquid from spreading. Measures to prevent water immersion should be taken in the warehouse of goods that will burn and explode when wet. 

5. Underground and semi-basement

1) Class A and B production sites should not be set up underground or semi-underground.

2) Class A and B warehouses should not be set up underground or semi-underground.

The intrinsically safe system is a circuit system that achieves electrical explosion-proof by limiting electrical energy, and does not restrict the use of places (where the ia level is applicable to dangerous places in Zone 0, Zone I, and Zone II) and explosive The type of gas mixture (limited to include all flammable gases); with a high degree of safety, maintainability and economy. A schematic diagram of an intrinsically safe system.

Part 3 Pressure Relief

1. Pressure relief facilities should be set up in the workshop with explosion hazard or in the part with explosion hazard in the workshop.
2. The pressure relief facilities should use lightweight roof panels, lightweight walls, doors and windows that are easy to relieve pressure, etc., and materials such as safety glass that do not produce sharp fragments during explosion should be used.
3. The pressure relief facilities should be set away from crowded places and main traffic roads, and should be close to the parts with danger of explosion.
4. The mass of lightweight roof panels and walls used as pressure relief facilities should not be greater than 60kg/㎡. The pressure relief facility on the roof should take measures to prevent the accumulation of ice and snow.
5. For Class A workshops that emit flammable gas and flammable vapor lighter than the air, light roof panels should be used as the pressure relief area. The ceiling should be as flat as possible without dead ends, and the upper space of the workshop should be well ventilated.

Part 4 Calculation pf Pressure Relief Area

Calculation formula of pressure relief area:

A=10CV2/3

A--pressure relief area (㎡);

V--the volume of the workshop (m³);

C - pressure relief ratio

1) Length-to-diameter ratio: the ratio of the product of the longest dimension in the geometric dimensions of the building and its cross-sectional perimeter to 4.0 times the cross-sectional area of the building.

2) When the aspect ratio of the factory building is greater than 3, the building should be divided into multiple calculation sections with an aspect ratio not greater than 3, and the common section in each calculation section shall not be used as a pressure relief area.

This explosion proof work light is LED type, 30 watt can replace to the traditional fluorescent lamps, 180 beam angle of optics design, rated for Zone 2 &22, and it's ideal for general work activities in hazardous location requiring explosion proof protection. In addition, this hand light’s lighting effects are particular good in the horizontal and vertical plane, no glare, no flicker, to improve the safety of the working at night.

This 360 beam angle explosion proof drop light is LED type, 30 watt can replace to the traditional fluorescent lamps, 360 beam angle of optics design, rated for Zone 2 &22, and it's ideal for general work activities in hazardous location requiring explosion proof protection. In addition, this hand light’s lighting effects are particular good in the horizontal and vertical plane, no glare, no flicker, to improve the safety of the working at night.

CESP portable LED explosion proof drop light (explosion proof hand lamp ) is 30W, rated for Zone 2 Zone 22, and it's ideal for general work activities in hazardous location requiring explosion proof protection. In addition, this hand lamp’s lighting effects are particular good in the horizontal and vertical plane, no glare, no flicker, to improve the safety of the working at night.

Application

• Wastewater treatment, oil and gas refineries, drilling rigs, petrochemical facilities, food and beverage facilities, tunnels, outdoor or indoor mounted general area lighting, and where flammable vapors, gases, ignitable dusts, fibers or flyings are present.

Standard

ATEX: EN IEC 60079-0-2018; EN 60079-7-2015; EN 60079-18-2015; EN 60079-31-2014;

Warning

ATEX :

• “WARNING – DO NOT OPEN WHEN ENERGIZED”；
• “WARNING – DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE IS PRESENT”；
• “WARNING – POTENTIAL ELECTROSTATIC CHARGING HAZARD – SEE INSTRUCTION”;
• End user shall use certified cable gland suitable type of protection for final installation purpose；
• The end user should be able to ensure that the product is not affected by the risk of static electricity.
• External earthing wire shall be connected when used and the cross-sectional area shall be more than 4mm²or 10AWG；
• Under rating condition, maximum temperature on the luminaire’s shell shall not be higher than 128℃ for T4.Temperature at cable inlet shall not be higher than allowable limit of the cable applied, to ensure the cable operation normally. The branch point is 51.4℃ and cable entry point is 47.3℃