_RP_531M-1980_scan.pdf

Measurement of Noise From Fired Process Heaters API RECOMMENDED PRACTICE 531M FIRST EDITION,MARCH 1980 American Petroleum Institute 2101 L Street,Northwest Washington,D.C.20037 JP Measurement of Noise From Fired Process Heaters Refining Department API RECOMMENDED PRACTICE 531 M FIRST EDITION,MARCH 1980 OFFICIAL PUBLICATION REG.U.S.PATENT OFFICE API recommended practices may be used by anyone desiring to do so,and every effort has been made by the Institute to assure the accuracy and reliability of the information contained in them.However,the Institute makes no representation,warranty,or guar-antee in connection with the publication of API recommended practices and hereby expressly disclaims any liability or responsibility for loss or damage resulting from their use;for any violation of any federal,state,or municipal regulation with which an API recommended practice may conflict;or for the infringement of any patent resulting from the use of an API recommended practice.Copyright 1980 American Petroleum Institute FOREWORD This recommended practice is based on the accumulated knowledge and experience of petroleum refiners,fired heater manufacturers,and engineering contractors.The ob-jective of this publication is to provide a standard test procedure for the measurement of noise emanating from fired process heaters.The metric system is used exclusively in this book because it is the universally accepted system and was the system used in the CONCA WE report(see Acknowledgment)that served as the basis for this recommended practice.Although it is recognized that the purchaser may desire to modify,delete,or amplify sections of the practice,it is strongly recommended that all such changes be made by supplementing this practice rather than by rewriting or by incorporating sections into another complete practice.Suggested revisions are invited and should be submitted to the director of the Refining Department,American Petroleum Institute,2101 L Street,N.W.,Washington,D.C.20037.Ill ACKNOWLEDGMENT Acknowledgment is made to CONCA WE Report No.2/76,Detennination of Sound Power Levels of Industrial Equipment,Particularly Oil Industry Plant,prepared by Mueller-BBM GmbH for CONCA WE Special Task Force;and to the CONCA WE Report No.3/77,Test Method for the Measurement of Noise Emitted by Furnaces for Use in Petroleum and Petrochemical Industries,which was prepared for the CONCA WE Noise Advisory Group by Special Task Force No.5:Furnace Noise.These CONCA WE reports fonn the basis for this recommended practice.The name CONCA WE is an acronym for Conservation of Clean Air and Water-Europe and is an organization to which several European oil companies belong.Iv CONTENTS PAGE SECTION 1-GENERAL 1.1 Introduction.,.1.2 Purpose.1.3 Scope.1.4 Instrumentation.1 1.5 Nomenclature and Definitions.2 1.5.1 Nomenclature.2 1.5.2 Definitions.2 SECTION 2-REQUIRED ORIENTATION PRIOR TO MAKING FIELD MEASUREMENTS 2.1 General Requirements.2 2.2 Recommended Standard Test Conditions.3 2.3 Noise-Level Measuring Techniques.3 2.4 Vibration Measuring Techniques.3 SECTION 3-PROCEDURES FOR SOUND LEVEL MEASUREMENT 3.1 General Procedures.3 3.2 Correction for Background Noise.4 3.3 Floor-Fired Heaters-Burner Area.5 3.4 External Walls With Burners.5 3.4.1 The Wall as a Radiating Surface.5 3.4.2 Burner Rows as Line Sources.6 3.4.3 Burners as Point Sources.6 3.5 Heater Walls Without Burners.6 3.5.l Noise Measurements.7 3.5.2 Vibration Measurements.7 3.6 Multiple-Cell Fired Heaters:Areas Between Heater Sections.7 3.7 Forced-Draft Fans.8 3.8 Exhaust Ducting.9 3.9 Convection Section.9 3.10 Special Cases.9 3.10.1 Natural-Draft Heaters With Both Wall and Floor-Fired Burners.9 3.10.2 Forced-Draft Heaters With Unsilenced Fans.10 3.10.3 Fired Heaters With Noise Control.10 3.10.4 Roof-Fired(Down-Flow)Heaters.10 SECTION 4-EV ALUATION OF MEASUREMENTS 4.1 Calculation of Mean Sound-Pressure Level.11 4.2 Calculation of Octave Band Sound Power Levels.11 4.3 Addition of Octave Band Sound Power Levels.11 4.4 Calculation of Vibratory-Velocity L.evels.11 V SECTION 5-REPORTING OF DATA 5.1 General Requirements.11 5.2 Summary.11 5.3 Requirements for Data Sheet._ 11 APPENDIX A-MODEL FORMAT FOR NOISE TEST REPORT 13 APPENDIX B-ILLUSTRATIVE EXAMPLE WITH COMPLETED NOISE TEST REPORT.19 LIST OF ILLUSTRATIONS Figures I-Measuring Positions and Surfaces for Burner Areas and Walls Without Burners on Cabin-Type Heaters.4 2-Measuring Positions and Surfaces for Burner Areas and Walls on Vertical Cylindrical Heaters.5 3-Typical Measuring Positions-Walls With Burners.6 4-Measuring Positions and Surfaces for Annular Area Between Fired Heater Sections.7 5-Measuring Positions for Suction Openings of Forced-Draft Fans.8 6-Typical Measuring Positions for Exhaust Ducting.9 B-1-Example Sketch of Generalized Crude Heater-Showing Microphone Measuring Positions and Dimensions for Illustrative Example.19 Tables I-Corrections for Measured Noise Level.4 vi Measurement of Noise From Fired Process Heaters SECTION 1