imdg - venting relief devices - t50 tanks

Doc titre : PRODUCT CALCULATION ACCORDING IMDGDoc Ref. 2009-029.XLS

Date :

Auteur : JEAN-LUC HEBERT

Pages : 1 / 3

Doc Index : venting,capacity,gases

Objectives, Calculation Methods, References

Page 2 Product Data and Calculations

Page 3 Tank Calculation

OBJECTIVES

The maximum quantity of product carried in order not to overload the tank ie : maxi gross weight.

The capacity of relieving the inside pressure in case of rapid increase of pressure in emergency situation.

CALCULATION METHODS

DATA SYMBOL METHODS

Pseudo Critical Temperature T'c

Pseudo Critical Pressure P'c

Pseudo Critical Compressibility Factor Z'c

Pseudo Critical Accentric Factor ω'

Pseudo Critical Volume V'c

Vapor Pressure Vp

Liquid Density LiqDens

Latent Heat of Vaporization at Boiling Pt HVAP Tb

Latent Heat of Vaporization at T HVAP

Critical Compressibility Factor Zc

Compressibility Factor at T Z

REFERENCES

IMDG CODE : amendment 33-06

Chen, N. H., "Generalized Correlation for Latent Heat of Vaporization", J. Chem. Eng. Data, 10(2): 207 (1965).

Rackett, H. G., "Equation of State for Saturated Liquids", J. Chem. Eng. Data, 15(4): 514 (1970).

Riedel L., Chem Ing. Tech., 26: 679 (1954).

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PRODUCTS CALCULATIONS FOR IMDG APPROVAL

GASES

The aim of these calculations is to qualify a tank to carry a chemical. 3 basic cases have to be checked :

The maximum pressure developped inside the pressure vessel during normal transportation if temperature increase.

Kay Mixing Rule

Kay Mixing Rule

Kay Mixing Rule

Kay Mixing Rule

Kay Mixing Rule

Lee-Kesler, Peng-Robinson EOS, Riedel Planck Miller, Mansoori, Antoine

Rackett, Guggenheim, Peng-Robinson EOS (Peneloux corr ), PTV

Chen, Riedel, Vetere

Watson, Pitzer

Peng-Robinson EOS, Pitzer, Lydersen, Nishiumi

Peng-Robinson EOS, SRK EOS

Kesler, M. G., and Lee, B. I., “Improve Predictions of Enthalpy of Fractions,” Hydro. Proc., 55, 153 (1976)

Kay, W. B., “Density of Hydrocarbon Gases and Vapor at High Temperature and Pressure,” Ind. Eng. Chem., 1014-1019, Sept. (1936).

Lydersen, A. L.: "Estimation of Critical Properties of Organic Compounds", Univ. Wisconsin Coll. Eng., Eng. Exp. Stn. 3,

Madison, Wis., April, 1955.

Peng, D. Y., and Robinson, D. B., “A New Two Constants Equation of State,”Ind. Eng. Chem. Fund., 15, 59 (1976).

Pitzer, K. S., D. Z. Lippman, R. F. Curl, C. M. Huggins, and D. E. Petersen, "The Volumetric and Thermodynamic

Properties of Fluids. II. Compressibility Factor, Vapor Pressure and Entropy of Vaporization", J. Am. Chem. Soc., 77:

3433 (1955).

Vetere, A., “New Generalized Correlations for Enthalpy of Vaporization of Pure Compounds”, Laboratori Ricerche Chimica

Industriale, SNAM PROGETTI, San Donato, Milanese, 1973.

Watson, K. M., "Thermodynamics of the Liquid State, Generalized Prediction of Properties", Ind. Eng. Chem., 35: 398

(1943). Pitzer, K. S., D. Z. Lippman, R. F. Curl, C. M. Huggins, and D. E. Petersen, "The Volumetric and Thermodynamic

Properties of Fluids. II. Compressibility Factor, Vapor Pressure and Entropy of Vaporization", J. Am. Chem. Soc., 77:

3433 (1955).

TANKCONTAINER-FR


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REFERENCES

UNIVERSAL GAS CONSTANT Ru Kpa*M3/KMol*°

K

8,31434

CONSTANTS SYMBOL UNITS DATA

PRODUCT DATA AND CALCULATION

CHEM NAME HEXAFLUOROPROPYLENE OXIDE

CAS 428-59-1

NAME ( UN )

BOILING TEMPERATURE Tb °K 246,150 DUPONT

2 896,00 DUPONT

CRITICAL TEMPERATURE

FILLING RATE TABLE T50 Kg/L NONE

MOLECULAR WEIGHT MW g/mol 166,00 NIST

DUPONT

CRITICAL PRESSURE P'c Kpa

T'c °K 359,15

PR Equation

PR Equation

CRITICAL VOLUME V'c cc/mol 281,00

CRITICAL COMPRESSIBILITY FACTOR Z'c 0,273

PR Equation

VAPOUR PRESSURE AT 55°C Vp 55C Kpa 1 441,00 LEE-KESLER equation

ACCENTRIC FACTOR Accf 0,373

GUGGENHEIM equation

UN NUMBER UN 3163 DUPONT

DENSITY AT 50°C LiqDens 50C Kg/L 1,19

= LIQDENS 50C*0,95

VAPOUR PRESSURE AT 55°C Vp 55C Kpa 1 441,00

FILLING RATE Required according

4.2.2.7FR Calc Kg/L 1,131

IMDG 6.7.3.1

MAWP Requested ( abs ) Kpa 1 476,00

HYDROSTATIC PRESSURE KPa 35,00

MAWP IMDG Requested ( Gauge ) Bar 13,76

TANKCONTAINER-FR


Date :


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TANK Mawp > IMDG Mawp

Bar > Bar

TANK Maxi Filling Rate > IMDG Filling Rate

>

TANK Saf. Rel. Dev. Capacity > IMDG Venting Capacity

M3 / H > M3 / H

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TANK CONTAINER CALCULATIONS

TANK CONTAINER DATA

MAXI GROSS WEIGHT MGW Kg 34 000,00

PAYLOAD PLD Kg 24 040,00

TARE WEIGHT TW Kg 9 960,00

MAWP PRESSURE VESSEL MAWP PV bar 34,40

TEST PRESSURE TP bar 44,72

TANK CAPACITY TCAP L 22 500,00

MAWP IMDG MAWP IMDG bar 27,50

PV VENTING CAPACITY M3/H 60665

TANK SURFACE TSURF M2 44,96

MAXI FILLING RATE Kg / L 1,069

BAFFLES (YES = Y / NO = N ) N

REQUIRED VENTING CALCULATION according IMDG paragraph 6.7.3.8

Surface A M2 44,96

ACCUMULATING PRESSURE ( gauge ) Bar 30,25

MAWP ( gauge ) Bar 27,50

ACCUMULATING TEMPERATURE T ° K 368,00 see Table below

ACCUMULATING PRESSURE ( abs ) Bar 31,25

see Table below

C C 0,607 default value

LATENT HEAT OF VAPORIZATION L KJ / Kg 187,96

see Table below

MOLECULAR WEIGHT M 166,000

COMPRESSIBILITY FACTOR Z 0,602

REQUIRED VENTING CAPACITY QM3 / S 2,845

M3 / H 10244

PHYSICAL DATA OF PRODUCT AT RELIEF DEVICES SETTINGS CONDITIONS

REDUCED TEMPERATURE Tr 1,025 = T / Tc

= P / Pc

VAPOUR PRESSURE VP Kpa 3128,000 LEE-KESLER equation

REDUCED PRESSURE Pr 1,080

COMPRESSIBILITY FACTOR Z 0,602 PENG-ROBINSON equation

REFERENCE TEMPERATURE T °K 368,000

LATENT HEAT OF VAPORIZATION HVAP KJ/mol 10,913

D Kg/M3 599,927 GUGGENHEIM equation

60665 10244 OK

1,069 Kg / L 1,131 Kg / L

TANKCONTAINER-FR

CHECK

CHECKING RESUME

27,50 13,76 OK

PITZER Correlation

LIQUID DENSITY

imdg - venting relief devices - t50 tanks

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