“Vapor pressure”

44.1 The Reid Vapor Pressure of an oil cargo is an indication of the propensity of that cargo to gassify at normal atmospheric pressure and temperature. There are some generically described cargoes, for example, naphtha, which may sometimes have a high Reid Vapour Pressure. Whilst not necessarily a dangerous cargo when carried under correct conditions, it may be difficult to pump in high ambient temperatures without the use of deepwell pumps. Special care and precautions therefore need to be taken and thus cargoes with a Reid Vapour Pressure in excess of 13.5 pounds are excluded cargoes under the Asbatankvoy form, although the parties may stipulate in Part I of the charterparty for cargoes of higher Reid Vapour Pressure if they so wish.