BS ISO 21072-2:2020 pdf free.Ships and marine technology — Marine environment protection: performance testing of oil skimmers.
1.This documentspecifies a methodology for establishing quantitative performance data for oil skimmersfor recovery of oil with light and medium viscosity (up to 50 000 cP), so the end user can objectivelyjudge, compare, and evaluate the design and performance of different skimmers. The methodologyapplies to testing in a basin and requires control of oil properties and oil slick characteristics.
The method is applicable to all types of skimmers provided that the equipment dimensions are withinthe physical limitations of the test basin. The test procedure provides the full-scale test results for theunit tested, under controlled conditions, and for one or more classes of oil. Attention is drawn to thecare required when applying the test results to predict skimmer performance under field conditions.For dedicated/in-built systems, the test procedures outlined in this document can only be used for theskimming device as such, not for the entire skimming system.
2.The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies.Forundated references, the latest edition of the referenced document (including any amendments) applies.
3.Throughout testing, there shall be sufficient clearance between the skimmer and the tank walls and anycontainment device, so as not to restrict oil flow to the skimmer or otherwise impede normal operationof the unit.
Since the necessary clearance varies with oil viscosity and unit recovery rate, adequate oilin-flow to theskimmer shall be demonstrated in each specific case, through oil flow observations or slick thicknessmeasurements.Ensure that the clearance between the tank wall and outer limit of the skimmer is at nopoint less than 50 % of the greatest width (diameter or equivalent dimension) of the skimmer under test.Iln considering the depth of the water on which the oil layer is floating, the skimmer or its oil/waterinterface shall at all times be able to free-float on the water.The clearance between the unit and thetank floor shall be sufficient to not interfere with normal operations of the skimmer.BS ISO 21072 pdf download.