The Zone Control System incorporates alarm pedestals and gas detectors placed in a perimeter around a hotwork zone. Detectors continuously monitor for the presence of hazardous gases while data is wirelessly transmitted to a monitored control console, tracking trends in atmospheric conditions. In the event that an atmospheric condition is detected outside the desired range for safe working conditions, the system will initiate and automatically shutdown all integrated hotwork components tied to that zone.

An additional fail-safe measure is added to initiate a shutdown should a malfunction be detected within the system, used or set up improperly.

The Motor Shutdown Gas Detector is designed as an intake based motor watch, hotwork equipment integrated shutdown system for open air welding operations on an offshore hydrocarbon producing facility. The detector monitors Hydrocarbons while connected to the “run” signal. In the event that an atmosphere is detected outside the desired range for safe working conditions, the system will initiate an automatic shutdown of the equipment. The shutdown is automatic and requires no human input.


Possible shutdown scenarios: If an undesirable atmospheric condition is detected by a gas detector, if a hot work ESD is initiated at a P3 Global ESD locations, if the Console operator initiates a master shutdown. In a master shutdown situation all Zones will shut down. Lastly the system is designed to Failsafe.

Comprehensive procedures and monitoring plans are provided by P3 personnel to prevent and mitigate hazards.

ZONE CONTROL COMPONENTS

failsafe

Wireless gas detection can include PID sensors to detect and VOC if requested, with Visual and Audible Alarms will be placed in a perimeter around a hot work zone. One Zone is assigned to each hot work area. Gas detectors will be placed in a perimeter around the hotwork area. Gas detectors will monitor for Oxygen, Hydrocarbons, Carbon Monoxide and H2S. Data is sent wirelessly to control console that is monitored by P3 Global system supervisor as to track any trends in atmospheric conditions. In the event that an atmosphere is detected outside the desired range for safe working conditions the system will initiate and automatic shutdown of all integrated hot work components tied into that zone. The shutdown is automatic and requires no human input.

Operators Control Console (OCC)

Located in a remote, non classified location. This is the location of the P3 Global Zone Control Operator.

Welding Controller System (WCS)

Located in a classified area of the facility. This component is the central hub for controlling the hot work equipment. Includes ESDs.

Shutdown Alarm Controller (SAC)

Located in a classified are and in a perimeter around the area to be hot worked. This is considered to be the alarms, wireless gas detectors, alarm horn and visual strobe.

Torch Solenoids

Located at the work site, solenoids control acetylene to the torch head. Bleed down time is less than 3 seconds.

Daily procedures include verifying control system integrity, testing equipment before hot work, continuous atmosphere monitoring, checking alarms and ESD systems, reviewing CSR plans, ensuring crew and equipment readiness, and logging data for safety, compliance, and operational monitoring.