_RP_1125-1991_scan.pdf

Overfill Control Systems for Tank Barges API RECOMMENDED PRACTICE 11 25 FIRST EDITION,FEBRUARY 1991 American Petroleum Institute 1220 L Street,NorthwestWashington,D.C.20005 19:49:14 l?Overfill Control Systems for Tank Barges Transportation Department API RECOMMENDED PRACTICE 1125 FIRST EDITION,FEBRUARY 1991 American Petroleum lnstitute 19:49:24 l?SPECIAL NOTES 1.API PUBLICATIONS NECESSARILY ADDRESS PROBLEMS OF A GEERAL NATURE.WITH RESPECT TO PARTICULAR CIRCUMSTANCES,LOCAL,STATE,AND FEDERAL LAWS AND REGULATIONS SHOULD BEREVIEWED.2.API IS NOT UNDERTAKING TO MEET THE DUTIES OF EMPLOYERS,MANUFACTURERS,OR SUPPLIERS TO WARN OR PROPERLY TRAINAND EQUIP THEIR EMPLOYEES,AND OTHERS EXPOSED,CONCERN-ING HEALTH AND SAFETY RISKS AND PRECAUTIONS,NOR UNDER-TAKING THEIR OBLIGATIONS UNDER LOCAL,STATE,OR FEDERALLAWS.3.INFORMATION CONCERNING SAFETY AND HEALTH RISKS ANDPROPER PRECAUTIONS WITH RESPECT TO PARTICULAR MATERIALSAND CONDITIONS SHOULD BE OBTAINED FROM THE EMPLOYER,THE MANUFACTURER OR SUPPLIER OF THAT MATERIAL,OR THE MATE-RIAL SAFETY DATA SHEET.4.NOTHING CONTAINED IN ANY API PUBLICATION IS TO BE CON-STRUED AS GRANTING ANY RIGHT,BY IMPLICATION OR OTHERWISE,FOR THE MANUFACTURE,SALE,OR USE OF ANY METHOD,APPA-RATUS,OR PRODUCT COVERED BY LETTERS PATENT,NEITHERSHOULD ANYTHING CONTAINED IN THE PUBLICATION BE CON-STRUED AS INSURING ANYONE AGAINST LIABILITY FOR INFRINGE-MENT OF LETTERS PATENT.5.GENERALLY,API STANDARDS ARE REVIEWED AND REVISED,RE-AFFIRMED,OR WITHDRAWN AT LEAST EVERY FIVE YEARS,SOME-TIMES A ONE-TIME EXTENSION OF UP TO TWO YEARS WILL BEADDED TO THIS REVIEW CYCLE.THIS PUBLICATION WILL NO LONGER BE IN EFFECT FIVE YEARS AFTER ITS PUBLICATION DATE AS AN OPERATIVE API STANDARD,OR WHERE AN EXTENSION HAS BEENGRANTED,UPON REPUBLICATION.STATUS OF THE PUBLICATIONCAN BE ASCERTAINED FROM THE API AUTHORING DEPARTMENTTELEPHONE(202)682-8000.A CATALOG OF API PUBLICATIONS ANDMATERIALS IS PUBLISHED ANNUALLY AND UPDATED QUARTERLYBY API,1220 L STREET,N.W.,WASHINGTON,DC 20005.Copyright 0 1991 American Petroleum Institute 19:49:24 the FOREWORD This recommended practice has been prepared under the auspices of the API Marine Transportation Committee.The purpose of this publication is to provide guidance to users and manufacturers on the design and operation of barge loading systems and overfill control systems.API publications may be used by anyone desiring to do so.Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them;however,the Institute makes no representation,warranty,or guarantee in connection with the publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal,state,or municipal regulation with which this publication may conflict.Suggested revisions are invited and should be submitted to the director of the Transportation Department,American Petroleum Institute,1220 L Street,N.W.,Washington,D.C.20005.iii 19:49:25 CONTENTS PAOE.SECTION 1-INTRODUCTION 1.1 Background 1.1.2 Purpose 1 1.3 Scope.1.1.4 Referenced Publications.1 SECTION 2-GUIDELINES FOR OVERFILL.CONTROL SYSTEMS 1.2.1 General 1.2.2 Tank Barges.1.2.3 Terminals 2.2.4 Electrical Connection 2.2.4.1 Tank Barges 2.2.4.2 Terminals 2.2.4.3 Connector Pin Assignments 2.2.4.4 Operations 2 19:49:25 RP*LL25 B=Overfill Control Systems for Tank Barges SECTION 1-INTRODUCTION.I second-bargelterminal valve(s)and operation of barge loading systems and overfill con-trol systems.1.3 Scope This recommended practice is intended to supplement Coast Guard regulations on marine vapor control sys-tems;its scope is limited to terminals and barges fitted with overfill control systems in accordance with Title 33 of the Code of Federal Regulations(CFR)Section 154.812 and Title 46 CFR Section 39,20-9(b),respec-tively.This recommended practice may be used to en-sure the compatibility of overfill control system equip-ment used in non-dedicated tank barge and terminal operations.1.4 Referenced Publications The following publications are cited in this recorn-mended practice:U.S.Coast Guard Regulations on Marine Vapor Control Systems(46 CFR Part 39.20-9(b),39.20-7,and 33 CFR Part 154.812)Regulations on Oil Pollution Prevention for Marine Oil Transfer Facilities 33 CFR Part 154.550(c)Regulations on Electrical Engineering(46 CFR Parts 110-113)Btemational Electrotechoical(IEC)termLal9s International Standard IEC 309-1(Part 1)and 309-2 overfilI(Part 2);plugs,socket-outlets and couplers for indus-trial purposes National Fire Protection Association 1 Background The first level of protection against cargo tank overfills is careful monitoring and control of the cargo transfer by the barge tankerman.In a closed loading operation,the tankerman monitors cargo level by using a closed gaug-ing system;he controls cargo level by manipulating on-board valves and by signaling the terminal to slow down or stop the cargo transfer.Operator error or equipment malfunctions may lead