Gas free is not optional before hot work
Hot work and enclosed-space entry demand a controlled tank atmosphere. Gas freeing ventilates and verifies that flammable and toxic vapour levels sit within agreed limits before permits are issued.
Core steps
- Isolate and prepare the tank after washing / demucking as required
- Ventilate with fans or inert-gas procedures per vessel system
- Test with calibrated instruments at multiple levels and locations
- Issue gas-free documentation for the work window
Demucking and sludge removal often come first — heavy residues continue to off-gas if left in place. See also tank gas freeing and our demucking topic cluster.
What to send operations
Last cargo, tanks involved, planned hot work scope and location. We align cleaning, gas freeing and waste handling in one mobilisation plan.
