API MPMS 3.1B-2001 Manual of Petroleum Measurement Standards Chapter 3-Tank Gauging - Section 1B-Standard Practice for Level Measurement of Liquid Hydrocarbons in Stationary Tanks .pdf

1、Manual of PetroleumMeasurement StandardsChapter 3Tank GaugingSection 1BStandard Practice for Level Measurement of Liquid Hydrocarbons in Stationary Tanks by Automatic Tank GaugingSECOND EDITION, JUNE 2001REAFFIRMED, AUGUST 2011Manual of PetroleumMeasurement StandardsChapter 3Tank GaugingSection 1BSt

2、andard Practice for Level Measurement of Liquid Hydrocarbons in Stationary Tanks by Automatic TankGaugingMeasurement CoordinationSECOND EDITION, JUNE 2001REAFFIRMED, AUGUST 2011SPECIAL NOTESAPI publications necessarily address problems of a general nature. With respect to partic-ular circumstances,

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16、ington, D.C. 20005.iiiCONTENTSPage3.1B.1 SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.1B.2 REFERENCED PUBLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.1B.3 DEFINITIONS. . . . .

17、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.1B.4 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.1B.4.1 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . .

18、. . . . . . . . . . . . . . . . . . . . . . 23.1B.4.2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.1B.4.3 Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33.1B.4.4 Use

19、 of ATGs For Custody Transfer or Inventory Control . . . . . . . . . . . . . . . 33.1B.4.5 Installation of ATGs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43.1B.4.6 Remote Readout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20、 . . . . . . . . . 93.1B.5 GENERAL PROCEDURES FOR INITIAL SETTING AND INITIAL VERIFICATION OF ATGs IN THE FIELD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.1B.5.1 Initial Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.1B.5.2 R

21、eference Manual Level Measurement Procedure . . . . . . . . . . . . . . . . . . . . 93.1B.5.3 Reference Measurement Tape and Weight Certication . . . . . . . . . . . . . . . . 93.1B.5.4 Effect of Weather . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.1

22、B.5.5 ATG TechnologySpecic Considerations . . . . . . . . . . . . . . . . . . . . . . . . . 93.1B.5.6 ApplicationSpecic Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.1B.6 INITIAL SETTING OF ATGs IN THE FIELD . . . . . . . . . . . . . . . . . . . . . . . . . . 103.1B.6

23、.1 Ullage-Based ATGs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.1B.6.2 Innage-Based ATGs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.1B.7 INITIAL VERIFICATION . . . . . . . . . . . . . . . . . . . . . . . .

24、 . . . . . . . . . . . . . . . . . . 103.1B.7.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.1B.7.2 Verication Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.1B.7.3 Initial Verica

25、tion Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.1B.8 RECORD KEEPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123.1B.9 SUBSEQUENT VERIFICATION OF ATGs FOR CUSTODY TRANSFER OR INVENTORY CONTROL . . . . . .

26、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123.1B.9.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123.1B.9.2 Frequency of Subsequent Verication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123.1

27、B.9.3 Procedure for Subsequent Verication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133.1B.9.4 Tolerance for Subsequent Verication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133.1B.10 DATA COMMUNICATION AND RECEIVING . . . . . . . . . . . . . . . . . . . . . . . . 13vP

28、ageAPPENDIX A SAFETY PRECAUTIONS: PHYSICAL CHARACTERISTICS AND FIRE CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15APPENDIX B ACCURACY REQUIREMENTS FOR ATGs . . . . . . . . . . . . . . . . . . . 17Figures1 Example of an ATG (Contact or Non-contact) Mounted on a Still Pipe

29、 Supported by Tank Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Example of an ATG (Contact or Non-contact) Supported by a Bracket Hinged to the Lower Tank Shell Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Example

30、 Installation of Top-Mounted ATGs on Fixed Roof Tanks Without Still Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 Example Installation of Top-Mounted Innage-ATG on Fixed Roof or Floating Roof Tanks Without Still Pipe . . . . . . . . . .

31、 . . . . . . . . . . . . . . . . . . . . . . . . 8vi1Manual of Petroleum Measurement StandardsChapter 3Tank GaugingSection 1BStandard Practice for Level Measurement of Liquid Hydrocarbons in Stationary Tanks by Automatic Tank Gauging3.1B.1 ScopeThis standard covers level measurement of liquid hydro-

32、carbons in stationary, aboveground, atmospheric storagetanks using automatic tank gauges (ATGs). The standard dis-cusses automatic tank gauging in general, accuracy, installa-tion, commissioning, calibration and verication of ATGsthat measure either innage or ullage. It covers both intrusiveand non-

33、intrusive ATGs used for either custody transfer orinventory control. The standard also covers the requirementsfor data collection, transmission and receiving.This standard does not cover the following:a. Hydrocarbons having a Reid vapor pressure above 15pounds per square inch absolute (100 kPa).b. M

34、easurement of weight or mass with ATG equipment.This is covered in Chapter 3.6 and Chapter 16.2 of the Man-ual of Petroleum Measurement Standards.c. Measurement of level in underground tanks or in pressur-ized tanks storing liquid hydrocarbons.d. Conversion of tank level to liquid volume. This is co

35、veredin Chapter 12.1 of the Manual of Petroleum MeasurementStandards.e. Measurement of temperature, sampling, density and sedi-ment and water (S b. not compromise the resolution of the measurement outputsignal; c. provide proper security and protection of the measureddata to ensure its integrity;d.

36、provide adequate speed to meet the update time requiredfor the receiving unit;e. be electromagnetically immune.15APPENDIX ASAFETY PRECAUTIONS: PHYSICAL CHARACTERISTICS AND FIRE CONSIDERATIONSPersonnel involved with handling petroleum-related substances and other chemical mate-rials should be familia

37、r with the materials physical and chemical characteristics, includingpotential for re, explosion, and reactivity and appropriate emergency procedures. Thesepersonnel should comply with safe operating practices of the individual company and local,state and federal regulations, including use of proper

38、 protective clothing and equipment. Per-sonnel should be alert to potential sources of ignition and should keep containers of materi-als closed when not in use.Note: Information regarding particular materials and conditions should be obtained from the employer,manufacturer, or supplier of that mater

39、ial, or the material safety data sheet.17APPENDIX BACCURACY REQUIREMENTS FOR ATGS (See Note)Requirement Custody Transfer InventoryFactory calibration 1 mm (1/16inch) 3 mm (1/8inch)Effect of installation 3 mm (1/8inch) n.a.Initial verication 4 mm (3/16inch) 25 mm (1 inch)Subsequent verication 4 mm (3

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