In the case of transport of this substance, the following additional requirements are applicable:

(a) The outside of the cargo tanks shall be equipped with insulation of low flammability. This insulation shall be strong enough to resist shocks and vibration. Above deck, the insulation shall be protected by a covering. 

The outside temperature of this covering shall not exceed 70 °C.

(b) The hold spaces containing the cargo tanks shall be provided with ventilation. Connections for forced ventilation shall be fitted.

(c) The cargo tanks shall be equipped with forced ventilation installations which, in all transport conditions, will reliably keep the concentration of hydrogen sulphide above the
liquid phase below 1.85 % by volume. 

The ventilation installations shall be fitted in such a way as to prevent the deposit of the goods to be transported. 

The exhaust line of the ventilation shall be fitted in such a way as not to present a risk to personnel.

(d) The cargo tank and the hold spaces shall be fitted with outlets and piping to allow gas sampling.

(e) The outlets of the cargo tanks shall be situated at a height such that for a trim of 2º and a list of 10º, no sulphur can escape. All the outlets shall be situated above the deck in the open air. Each outlet shall be equipped with a permanently fixed closing mechanism.

One of these mechanisms shall be capable of being opened for slight overpressure within the tank.

(f) The piping for loading and unloading shall be equipped with adequate insulation. They shall be capable of being heated.

(g) The heat transfer fluid shall be such that in the event of a leak into a tank, there is no risk of a dangerous reaction with the sulphur.