Heat, Light & Power For Hazardous Area Offshore HVAC Systems
Published 06 Oct 2016
- By Chris Dodds : estimated reading time 5 minutes
Thorne & Derrick, The Explosive Atmosphere Experts, distribute products to provide safe Heat, Light & Power to hazardous area locations.
In this post we shall outline the scope of our hazardous area certified Electrical, Process Control & Instrumentation products suitable for offshore HVAC systems and temporary accommodation modules.
We consult with our clients to supply explosion-proof Heat, Light & Power solutions for offshore vessels – this includes FPSO, Gas Production Platforms, Jack Up Units, Drilling Rigs, Cable Laying Vessels and Offshore High Voltage Stations.
HVAC and Power systems must handle harsh weather, turbulent waves, explosive atmospheres, extreme temperatures, seawater splash and hydrocarbon exposure – the hazardous area certified equipment supplied by T&D ensures safe and reliable service to compressor halls, switchboard rooms, instrument rooms, battery rooms, transformer rooms and low voltage/high voltage electrical distribution rooms.
Safety Offshore
T&D can meet the certification challenges posed by hazardous area locations by ensuring all heating, lighting and power distribution equipment is safe for use in potentially explosive atmospheres – we are experienced in servicing offshore accommodation and workspace modules with ATEX and IECEx approved equipment.
hazardous area Heating
T&D are Main Stockists and Distributors for EXHEAT – we hold extensive stocks of EXHEAT FAW 240/425v, single phase, 1kW-3kW hazardous area air warmers with T class rating, T3.
EXHEAT FAW heaters provide comfortable working conditions in hazardous areas where the potentially explosive atmosphere is classified as a Zone 1 or Zone 2 (IIA, IIB, IIC) gas group.
Hazardous area room thermostats provide frost protection and condensation prevention and Zone 1 and Zone 2Â anti-condensation space heaters are also available.
EXHEAT HEF hazardous area anti-condensation and space heaters provide frost protection and condensation prevention and Zone 1 and Zone 2 applications. Hazardous area (flameproof) room thermostats are available but not for use with anti-condensation heaters as these are self-regulating type.
For non-hazardous area, safe location heating we stock industrial convector heaters suitable for floor or wall mounting with optional adjustable 0- 40°C room temperature controlled thermostat.
- Air Heaters & Air Duct Heaters – Ex d Flameproof & Ex e Increased Safety Electrical Heaters (Zone 1 & Zone 2)
- Immersion Heaters – Ex d Flameproof Rod, Flanged & Removable Core Heaters (Zone 1 & Zone 2)
- Water Heaters – Point Of Use Ex d Flameproof Calorifiers & Bulk Storage Heaters (Zone 1 & Zone 2)
- Line Heaters – Hazardous Area Ex d Flameproof Line Heaters Maintain Process Liquid Flow (Zone 1 & Zone 2)
Hazardous Area Room Flameproof Thermostats – EXHEAT HFT / AFT / RFT thermostats are certified according to ATEX & IECEx where a potentially explosive atmosphere is designated as a Zone 1 or Zone 2 (IIA, IIB, IIC) gas group
Flameproof Ex d or Increased Safety Ex e ?
Whether the hazardous area classification is Flameproof Ex d and Increased Safety Ex e we can provide explosion-proof heating equipment for safe operation according to ATEX and IECEx certification with suitable T-Class Rating and Gas Groups compatibility.
- EXHEAT FWD Flameproof Heater Ex d IIC T2 to T4 Gb suitable for Zone 1 and Zone 2 – ATEX / IECEx CertifiedÂ
 II 2 G/D - EXHEAT FAW Increased Safety Heater Ex e IIC T2 to T4 Gb suitable for Zone 1 and Zone 2 (IP67) – ATEX / IECEx Certified  II 2 G
EXHEAT Hazardous Area Heaters – Zone 1 & Zone 2 Offshore Heating
hAZARDOUS AREA POWER
Marechal Electric are world leading manufacturers of industrial and Ex hazardous area plugs and sockets: the explosion-proof Marechal DXN Decontactor range of compact and watertight connectors are rated for operation up to 63A with integrated load-break switch.
Marechal DXN hazardous area plugs and sockets with ATEX certification are rated from 20-63amps, IP66/67 watertight ingress protected and with 
socket-outlet safety shutter providing IP4XÂ protection.
- ATEX Certification: II2GD Ex de IIC Gb – Ex tb IIIC Db
T&D can assist with the specification and supply of all power distribution requirements for Zones 1 & 2 (Gas) and Zones 21 & 22 (Dust) – we are Approved Distributors for Marechal and our trained sales engineers are available to discuss your requirements.
Hazardous Area Lighting
Petrel are leading manufacturers of hazardous area lighting and control equipment for use in potentially explosive atmospheres – safe, reliable, high quality lighting certified by ATEX and IECEx. T&D are Approved Distributors for Petrel lighting providing reduced maintenance and higher light levels for explosive atmospheres.
- Fluorescent Luminaires Ex Ed (including LED) – Zone 1Â 18W to 58W
- Floodlights Ex de – Zone 1 & Zone 2Â 150W to 500W
- Wellglass Ex de – Zone 1 up to 250W
- Breakglass Ex de – Zone 1Â up to 200W
- Bulkhead – Ex nR Submersible  Bulkead Luminaire
âž¡ More Info: Hazardous Area Lighting Zone 1Â and Hazardous Area Lighting Zone 2
H2S Sour Gas detection
T&D also distribute H2S gas detectors to check and monitor atmospheric presence of flammable and toxic gases including hydrogen sulphide (H2S) and toxic sour gas mixtures to guarantee safety of maintenance crews and workers.
T&D Distribute Crowcon Gas Detectors
H2S Risk Areas
H2S gas can be expected in all areas of the offshore rig where drilling fluid and associated equipment is located – rig floors, substructures, shale shakers, mud cleaners, mud pit rooms, mud pump rooms and well test equipment.
Being heavier than air, H2S will settle in low-lying and poorly ventilated areas and will dissolve in oil and water present in those areas.
H2S Physiological Effects
The primary route of H2S gas exposure is by inhalation – in gas concentrations less than or around 50 parts per million (ppm), H2S acts as a mucous membrane and respiratory tract irritant; symptoms include coughing, shortness of breath, eye and throat irritation.
At concentrations of approximately 100 ppm, H2S paralyses the olfactory nerve and the sense of smell – the toxic gas is rapidly absorbed by the lungs and transferred to the blood circulation, where it inhibits the cytochrome oxidase enzyme system, which regulates the uptake of oxygen at the cellular level.
Process Instrumentation
T&D are Explosive Atmosphere specialists distributing Process & Instrumentation Equipment to the hazardous area industries where ATEX & IECEx certified equipment is required (Class/Division/Zones 1 & Zone 2).
Hazardous Area Process Instrumentation – contact us to discuss your requirements
See Infographic for further details of how T&D support the international oil and gas industry.
MOBILE COMMUNICATIONS FOR HAZARDOUS AREASÂ 
Ecom Instruments are world-leading manufacturers of ATEX certified hazardous area mobile phones, laptops and tablets for use in explosion protected areas, including hazardous areas Zone 1 and Zone 2 – contact T&D to discuss your mobile communication requirements.
T&D UK & International: Project Suppliers To The Onshore & Offshore Oil, Gas, Petrochem & Hazardous Area Industries.
More Reading
- Portable ATEX Heaters – Hazardous Area Heating (Zone 1 & Zone 2 – ATEX Certified)
- ATEX Transmitters For Hazardous Area Temperature & Humidity Measurement From Rotronic
- ATEX Solenoid Valves – ASCO Valves for International Hazardous Area InstallationsÂ
Invitation – network, engage, promote
Thorne & Derrick are inviting you to join LinkedIn’s fastest growing Discussion Group – Process & Hazardous Area Industries : Heat Tracing, Gas Detection, Fluid Control & Flow Measurement. News, projects, videos, promotions, whitepapers, jobs, webinars, press plus much more. 
ABOUT US
Thorne & Derrick International are your single-source supplier of Electrical, Mechanical, Process & Instrumentation Equipment. T&D provide an outstanding service to UK and international customers – we are highly customer responsive and absolutely committed to providing a world-class service.
T&D supply utilities, power, renewable energy, construction, rail, manufacturing, food/beverage, mining, oil, gas and petrochemical industries – distributing 100,000+ products from 100+ manufacturers from multi-million pound stocks. Since 1985 we have established a solid reputation based on service, integrity and trust.
