_RP_1141-1994_scan.pdf

Guidelines for Confined Space Entry On Board Tank Ships in The Petroleum Industry API RECOMMENDED PRACTICE 1141 FIRST EDITION,MARCH 1994 Stratey,ies for Todays Environmental Partnership American Petroleum Institute1220 L Street,Northwest Washington,D.C.20005 ii?Guidelines for Confined Space Entry On Board Tank Ships in The Petroleum Industry Manufacturing,Distribution and Marketing Department API RECOMMENDED PRACTICE 1141 FIRST EDITION,MARCH 1994 American Petroleum Institute ii?SPECIAL NOTES I.API PUBLICATIONS NECESSARILY ADDRESS PROBLEMS OF A GENERALNATURE.WITH RESPECT TO PARTICULAR CIRCUMSTANCES,LOCAL,STATE,AND FEDERAL LAWS AND REGULATIONS SHOULD BE REVIEWED.2.API IS NOT UNDERTAKING TO MEET THE DUTIES OF EMPLOYERS,MANUFACTURERS,OR SUPPLIERS TO WARN AND PROPERLY TRAIN AND EQUIPTHEIR EMPLOYEES,AND OTHERS EXPOSED,CONCERNING HEALTH ANDSAFETY RISKS AND PRECAUTIONS,NOR UNDERTAKING THEIR OBLIGATIONSUNDER LOCAL,STA.TE,OR FEDERAL LAWS.3.INFORMATION CONCERNING SAFETY AND HEALTH RISKS AND PROPERPRECAUTIONS WITH RESPECT TO PARTICULAR MATERIALS AND CONDITIONS SHOULD BE OBTAINED FROM THE EMPLOYER,THE MANUFACTUREROR SUPPLIER OF THAT MATERIAL,OR THE MATERIAL SAFETY DATA SHEET.4.NOTHING CONTAINED IN ANY API PUBLICATION IS TO BE CONSTRUED ASGRANTING ANY RIGHT,BY IMPLICATION OR OTHERWISE,FOR THE MANUFACTURE,SALE.OR t:SE OF ANY METHOD,APPARATUS,OR PRODUCT COVERED BY LETTERS PATENT.NEITHER SHOULD ANYTHING CONTAIKED INTHE PUBLICATION BE CONSTRUED AS INSURING ANYONE AGAINST LIABILITY FOR INFRINGEMENT OF LETTERS PATENT.5.GENERALLY,API STANDARDS ARE REVIEWED AND REVISED,REAFFIRMED,OR WITHDRAWN AT LEAST EVERY FIVE YEARS.SOMETIMES A ONETIME EXTENSION OF UP TO TWO YEARS WILL BE ADDED TO THIS REVIEWCYCLE.THIS PUBLICATION WILL NO LONGER BE IN EFFECT FIVE YEARS AFTER ITS PUBLICATION DATE AS AN OPERATIVE A.Pl STANDARD OR,WHEREAN EXTENSION HAS BEEN GRANTED,UPON REPUBLICATION.STATUS OF THEPUBLICATION CAN BE ASCERTAINED FROM THE API AUTHORING DEPARTMENT TELEPHONE(202)682-8000.A CATALOG OF A.PI PUBLICATIONS ANDMATERIALS IS PUBLISHED ANNUALLY AND UPDATED QUARTERLY BY API,1220 L STREET,N.W.,WASHINGTON,D.C.20005.Copyright l 994 American Petroleum Institute FOREWORD This recommended practice was prepared under the auspices of the API General Committee on Marine Operations.It is intended for use by API member companies and others to develop confined space entry procedures for work on board tank ships.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 this 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 Manufacturing,Distribution and Marketing Department,American Petroleum Institute,1220 L Street,N.W.,Washington,D.C.20005.iii-CONTENTS SECTION I-GENERAL.1.1 Scope.1.2 Conformance to API Environmental Mission and Guiding Principles.Page 1.3 Definitions.1 1.4 Referenced Publications.3 1.5 Supplementary Information.3 SECTION 2ADMINISTRATIVE CONTROLS.4 2.1 Written Procedures and Guidelines.4 2.2 Administrative Standards.4 2.3 Authority for Initiating Entry.4 SECTION 3-CONFINED SPACE HAZARDS ON TANK SHIPS.4 3.1 General.4 3.2 Oxygen Deficiency.4 3.3 Fires and Explosions.5 3.4 Toxic Substances.5 3.5 Physical Hazards.6 SECTION 4-PRE-ENTRY CONSIDERATIONS.6 4.1 Identification of Hazards.6 4.2 Permit.6 4.3 Isolation.6 4.4 Atmospheric Control and Ventilation Prior to Entry.7 4.5 Emergency Procedures for Inerting and/or Ventilating a Confined Space with an Explosive or Overrich Atmosphere or Which Contains Unexpected Hydrocarbons for Which the Space is Intended.7 4.6 Pre-entry Atmosphere Testing.7 4.7 Standby Personnel.8 4.8 Illumination.8 SECTION 5PERSONAL PROTECTIVE EQUIPMENT.8 5.1 General.8 5.2 Calibration and Maintenance.8 SECTION 6-PERMITTING AND ENTRY.9 6.1 General.9 6.2 Initial Entry Inspection to Confirm Entry Conditions.9 6.3 Safety Meeting.9 6.4 Work Procedures.9 SECTION 7-SPECIAL CONSIDERATIONS FOR PUMPROOMS.9 APPENDIX A-SAFETY AND HEALTH CONSIDERATIONS.11 APPENDIX B-SAMPLE CONFINED SPACE ENTRY PERMIT.15 Table A I-Concentration and Typical Characteristics RegardingHydrogen Sulfide Exposure.13 V Guidelines for Confined Space Entry On Board Tank Ships in the Petroleum Industry SECTION 1-GENERAL 1.1 Scope This recommended practice provides guidance for safely entering and working in confined spaces on board tank ships in the petroleum industry.The work procedures and recommendations described in this recommended practice are based on a consensus among marine operators of the essential elements needed in a confined space entry program to prevent accidents,injuries,and illnesses.In addition,marine opera