3 Criteria for identifying "benign crude oil"
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1421 – Guidelines on Exemptions for Crude Oil Tankers Solely Engaged in the Carriage of Cargoes and Cargo Handling Operations not Causing Corrosion – (13 June 2012) - Annex – Guidelines on Exemptions for Crude Oil Tankers Solely Engaged in the Carriage of Cargoes and Cargo Handling Operations not Causing Corrosion - 3 Criteria for identifying "benign crude oil"

3 Criteria for identifying "benign crude oil"

 The following criteria should be used when identifying "benign crude oil". A ship which is built to be engaged solely in the carriage of such oil and cargo handling operations not causing corrosion may be exempted from the requirements of SOLAS regulation II-1/3-11.3.

  • .1 The hydrogen sulphide (H2S) content of the crude oil shipment is below recognized detectable limits, i.e. it does not contain this vapour type as transforming into the vapour phase of the cargo tank.

  • .2 It is a no heat crude oil whose carriage temperature does not exceed 25°C.

  • .3 The water content of the crude oil is less than 500 ppm.

  • .4 The salt content of the crude oil is not more than 25 ppm.

  • .5 The Acid Number of the crude oil is less than 0.05 mg KOH/g. This level of concentration is developed from a review of hundreds of crude oil assays reporting this concentration and represents a "reasonable worse case" scenario for what could be considered a benign crude oil, including Alaskan North Slope Crude Oil.

Parent topic: Annex – Guidelines on Exemptions for Crude Oil Tankers Solely Engaged in the Carriage of Cargoes and Cargo Handling Operations not Causing Corrosion
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