It is essential to understand the differences in the various calculation procedures practiced if discrepancies between cargo calculated as loaded and cargo calculated as discharged are to be correctly recognised as either real or spurious.

 

This new edition, which is completely revised, continues to assist the Chief Officer with this complex problems.

 

Author: SIGTTO.

Published: 1997

No Pages: 31

ISBN: 9781856091442 

PREFACE

1. INTRODUCTION

2. VAPOUR/LIQUID EQUILIBRIUM

3. TERMS AND DEFINITIONS

3.1 GENERAL-DENSITY IN AIR AND DENSITY IN VACUO

3.2 TRUE DENSITY – APPARENT DENSITY

3.3 RELATIVE DENSITY (SPECIFIC GRAVITY)

3.4 APPARENT RELATIVE DENSITY (APPARENT SPECIFIC GRAVITY)

4. VAPOUR DENSITY

4.1 GENERAL

4.2 PERFECT GASES

4.3 REAL GASSES

5. LIQUID DENSITY

5.1 INTRODUCTION

5.2 PRACTICAL DENSITY METHOD: THE PRESSURE HYDROMETER (ASTM D1657)

5.3 DENSITY FROM COMPOSITIONAL ANALYSIS

5.3.1 ASTM D2598

5.3.2 THE FRANCIS FORMULA

5.3.3 THE COSTALD EQUATION

5.3.4 SPECIFIC DENSITY CALCULATION METHODS AND TABLES

5.4 LNG

6. VOLUME AND TOTAL QUANTITY DETERMINATION

6.1 TANK INVENTORY

6.2 THE LIQUID QUANTITY

6.3 SUMMARY

6.3.1 FROM LIQUID DENSITY AT OBSERVED TEMPERATURE

6.3.2 FROM LIQUID DENSITY AT REFERENCE TEMPERATURE

7. SHORE TERMINAL CONSIDERATIONS

7.1 COMPARISON BETWEEN SHIP AND SHORE FIGURES

7.2 FLOWMETERING

8. FUTURE DEVELOPMENT

9. CONCLUSION

APPENDIX 1 PROPERTIES OF COMMERCIAL GASES

APPENDIX 2 WEIGHT IN AIR CONVERSION

APPENDIX 3 THE FRANCIS FORMULA

APPENDIX 4 THE COSTALD EQUATION

APPENDIX 5 QUANTITY CALCULATION OF LPG – AN EXAMPLE

APPENDIX 6 MEASUREMENT REPORT FOR LIQUEFIED GASES 

Title: Quantity Calculations LPG and Chemical Gases 2nd Ed
Number of Pages: 31
Product Code: 4400w050
ISBN: ISBN 13: 978-1-85609-144-2 (9781856091442), ISBN 10: 1-85609-144-9 (1856091449)
Published Date: September 1997
Binding Format: Paperback
Book Height: 300 mm
Weight: 0.20 kg