Tips on inspection of Ex equipment;
(A full checklist is provided in the handout)
• Equipment is correct for Zone • All cables must be armoured • Glands for Exd should be Exd or Exde • Glands for Exe should be Exe or Exde • Armour to be clamped by the gland • For Ex equipment blanks to be Ex rated • For Exe equipment the glands and
• IEC standards are not frozen in time but evolve for many reasons such as new materials being produced, technical advances are made and findings from disaster enquires to name but a few
• Bell nipple –
zone 1
Байду номын сангаас
• Shale shakers -
zone 1
• Heli fuel area -
zone 1
• Battery locker -
zone 1
• Paint locker -
zone 1
• Below heli deck -
zone 1
• Crown
zone 1
project will be to IEC standards
The IEC has over a century of experience producing electrical standards
• The first hazardous area standards were created for the mining industry and then expanded to include the oil and gas sector
Both far away – Deepwater Horizon, Gulf of Mexico, April 2010
And close to home - Pingyu Coal & Electric Co Ltd, Yuzhou, Henan Province, October
2010
This presentation is based on the International Elecrotechnical Commission’s publication IEC60079
• Mud pits -
zone 2
• Drill floor -
zone 2
• Riser storage -
zone 2
• Vents from enclosed hazardous areas
zone 2
• Loading stations port and starboard
zone 2
• all equipment in exterior locations which is capable of operation after a shutdown is to be suitable for installation in Zone 2 locations.
All regulations MUST be adhered to =============
There can be no exceptions
The zones for this vessel can be found on drawing M40188-1030015 - Hazardous Area Plan
Note; There is a philosophy hierarchy, Zone 0 equipment can be used in Zones 1&2, Zone 1 equipment can be used in Zone 2
List of Hazardous Areas on Hai Yang Shi You 981
There are other publications such as the National Electric Code (NEC) in the USA
that have also produced standards for hazardous areas but the equipment in this
危险区域电气设备安装注意事 项-101021蔡文
• It cannot be stressed how important the philosophies followed to deny ignition sources to flammable gases are.
• The smallest ignition source can lead to the most dire consequences……,
• These standards are written to provide the best possible protection in the event of a gas escape utilising
experience of prior disasters and the leading experts in the hazardous area field
Flammable gases require ONLY ONE source of ignition
All equipment MUST comply with the regulations
Disaster news stories usually say there was AN explosion
Plus - all equipment in exterior locations which is capable of operation after a shutdown is to be suitable for installation in
Zone 2 locations
There are various philosophies that are defined by the IEC to deny source of ignition