_API_MPMS_19.3C-1998_2002.pdf

Manual of PetroleumMeasurement StandardsChapter 19.3-Evaporative LossMeasurementPart C-Weight Loss Test Method for theMeasurement of Rim-Seal Loss Factorsfor Internal Floating-Roof TanksMeasurement CoordinationFIRST EDITION,JULY 1998AmericanPetroleumInstituteHelping YouGet The JobDone Right.M93seeenA9Licensee-Technip Abu Dabhi/5931917101No reproduction or networking permitted without license trom IHSot for Res8e,0222200601H226M5TFOREWORDThis standard provides rules for testing the rim seals of internal floating roofs under lab-oratory conditions to provide evaporative rim-seal loss factors.It was prepared by TaskGroup II of the API Environmental Technical Advisory Group(ETAG).Testing programs conducted by API,which began in the mid-1970s and extendedthrough 1982,provided the information on which the current evaporative rim-seal loss fac-tors are based for common,generic types of external,covered,and internal floating-roofrim seals.These rim-seal loss factors are published in API Publication 2517,EvaporativeLoss From External Floating-Roof Tanks;API Publication 2519,Evaporation Loss FromInternal Floating-Roof Tanks;and in API Manual of Petroleum Measurement Standards,Chapter 19.2,Evaporative Loss From Floating-Roof Tanks,for use in estimating theevaporative loss of petroleum stocks from external,covered,and internal floating-rooftanks.These rim-seal loss factors and the test methods used to develop them have beenwidely accepted by oil companies,manufacturers,industry groups,regulatory agencies,and general interest groups.API has not,however,tested or developed evaporative rim-seal loss factors for proprietary designs of individual manufacturers.By publishing thistest method,APl is making the test method available to interested parties who wish to testparticular rim seals under the auspices of API.API certification of an evaporative loss factor developed through this program is subjectto the following three-step process:(a)The testing shall be performed in laboratories licensed by API.The requirements toqualify for licensure are presented in API Manual of Petroleum Measurement Stan-dards,Chapter 19.3,Part G,Certified Loss Factor Testing Laboratory Registration;(b)Testing and determination of test results shall be performed as specified herein;and(c)The evaluation of these test results and the certification of an evaporative loss factorfor the item tested shall then be conducted in accordance with API Manual of Petro-leum Measurement Standards,Chapter 19.3,Part F,Evaporative Loss Factor forStorage Tanks Certification Program.API publications may be used by anyone desiring to do so.Every effort has been made bythe Institute to assure the accuracy and reliability of the data contained in them;however,theInstitute makes no representation,warranty,or guarantee in connection with this publicationand hereby expressly disclaims any liability or responsibility for loss or damage resultingfrom its use or for the violation of any federal,state,or municipal regulation with which thispublication may conflict.Suggested revisions are invited and should be submitted to the Measurement Coordinator,American Petroleum Institute,1220 L Street,N.W.,Washington,D.C.20005.Licensee=Technip Abu Dabhi/5931917101No reproduction or networking permittod without license from IHSNot for Resale,02/222006 01:12:26 MST