In order to create an acceptable safety level when executing hot work at potentially explosive locations, several safety barriers have to be in place. Equally vital is proper risk assessment and training of the operators.

Compliance with Norwegian regulations

StS gruppen's Flexi Habitat System complies with the Norwegian rules and regulations governing the oil & gas industry, one of the strictest legislative framework in the world.
The framework for hot work enclosures includes amongst other following internationally acknowledged rules and regulations:

  • NORSOK Standard Z-015 - Temporary equipment
  • NORSOK Standard S-001 - Technical Safety
  • Regulations by the Petroleum Safety Authority Norway


All relevant equipment used for the operation of the habitat is certified and approved for ATEX Zone 1.
The fans StS gruppen deploys are driven by Ex-certified air motors or Ex-certified electrical motors equipped with Ex-certified dampers.


StS gruppen had devised detailed procedures for the installation and operation of habitats.
Risk Management procedures include Safe Job Analysis and Toolbox Meetings.
All checklists and manuals in use are approved by the internationally recognised certification body DNV (Det Norske Veritas).

Automatic Shutdown

Key feature of StS gruppen’s safety system is the automatic system shutdown.
The shutdown is automatically triggered when one of the following criteria is met:

  • Gas detection
  • Loss of overpressure
  • High temperature
  • Rapid temperature increase
  • Equipment malfunction
  • Emergency stop
  • Change in installation status

StS gruppen’s
automatic habitat shutdown system is protected
by patent in several countries around the world.

Deluge System

In order to further improve safety, StS gruppen has developed a Deluge system that can be installed at the entrance of the habitat.
The deluge water curtain is designed to neutralise potential gas clouds. The deluge system is automatically activated when a loss of pressure is detected. The system is also equipped with manual intervention controls both inside and outside the habitat.
This habitat deluge system is worldwide the first of its kind.

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