s2s CEI Workbook

8/10/2019 s2s CEI Workbook

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Read Me First

This workbook is a calculation method for the Dow Chemical's Chemical Exposure Index which gives a quick estimate of

the ERPG2 and ERPG3 footprint of a standard scenario described in the guidance book S2S_Chemical_Exposure_Index.doc

The scenarios are described in this guidnce book as is the mathematics of the method which are incorported into the

spreadsheet. There are 3 release types provided:

This calculation allows you to input hole sizes This calculation allows you to input hose sizes This calculation allows you to use known

for releases, but assumes that any pipe for releases. It assumes that 'full bore' discharge rates.

of a diameter greater than 2 inch will not failure occurs

fail in a guillotine fracture. See the scenario See the scenario

section of the guidance document section of the guidance document

S2S_Chemical_Exposure_Index.doc S2S_Chemical_Exposure_Index.doc

Emergency Response Planning Guidelines and Physical Properties are provided for many common materials.

The reference to level 2 Risk Analysis can be found in the Progressive Process Safety Management Systems within S2S.

Please note that several cases have been filled in on this spreadsheet as examples.

Piping release or

vessel nozzlerelease

Hose Release

Overflow or relief

when dischargequantity known.

11/21/2014 1 / 9 252387294.xls.ms_



Results Summary

Plant Chlorination

Unit Substance Scenario Distance ERPG2 (Liquid Release) Metres D

Case 1 store V101

Chlorine in pressurised

store Pipe leak 16932


store Hose leak 817


store Relief or overflow 5245

Other - write description

in this cell

Case 2 Pipe leak #VALUE!

Hose leak #VALUE!

Relief or overflow #VALUE!


in this cell

Case 3 Pipe leak #VALUE!

Hose leak #VALUE!



in this cell

Case 4 Pipe leak #VALUE! Hose leak #VALUE!



in this cell

Case 5

10 minute release of

anhydrous ammonia at

7000 kg/hr flow rate Pipe leak 126710 minute release of


7000 kg/hr flow rate Hose leak #VALUE!10 minute release of


7000 kg/hr flow rate Relief or overflow #VALUE!

0


in this cell

11/21/2014 2 / 9



ERPGs and Physical Properties

Molecular Boiling ERPG-1 ERPG-1 ERPG-2 ERPG-2 ERPG-3 ERPG-3 Vapour Liquid Heat

Weight Point Pressure Density Capacity

(°C) (mg/m3) (ppm) (mg/m3) (ppm) (mg/m3) (ppm) (kPa) (kg/m3) (J/kg-°C)

Acetone cyanohydrin * 85.1 - - - 35 10 - - - - -

Acrolein 56.1 52.5 - 0.1 1 0.5 7 3 36 835.1 2.00E+03

Acrylic acid 72.1 141.4 6 2 147 50 2210 750 0.5 1046.7 1.80E+03

Acrylonitrile * 53.1 77.2 22 10 76 35 163 75 14 778.7 2.06E+03

Allyl chloride 76.5 44.8 9 3 125 40 939 300 48.6 932.1 1.53E+03 Ammonia 17 -33.4 17 25 104 150 522 750 1013.1 602.2 4.74E+03

Benzene 78.1 80.1 - - - - - - 12.7 874.5 1.74E+03

Bromine 159.8 58.7 1 0.2 7 1 33 5 28.5 3106.4 4.65E+02

Butadiene 54.1 -4.4 22 10 442 200 11060 5000 - - -

n-butyl acrylate 128.2 - 0.26 0.05 131 25 1310 250 0.7 894.5 1.82E+03

n-butylisocyanate 99.1 - 0.04 0.01 0.2 0.05 4 1 2.6 886.6 1.60E+03

Carbon disulfide 76.1 46.3 3 1 156 50 1557 500 48.3 1256.3 1.09E+03

Carbon monoxide 28 -191.5 - 200 - 350 - 500 - - -

Carbon tetrachloride 153.8 76.8 126 20 629 100 4718 750 15.2 1582.9 8.24E+02

Chlorine 70.9 -34 3 1 9 3 58 20 779.4 1400.3 9.85E+02

Chlorine trifluoride 92.5 - 0.38 0.1 4 1 38 10 - - -

Chloroacetyl chloride 112.9 106 0.25 0.05 2.5 0.5 23 5 3.3 1410.8 1.17E+03

Chloroform * 119.4 61.7 - - 244 50 24413 5000 26.3 1480.8 9.54E+02

Chloropicrin 164.4 112 1 0.1 2 0.3 10 1.5 3.4 1646 8.55E+02

Chlorosulfonic acid 116.5 - 2 0.4 10 2.1 30 6.3 - - -

Chlorotrifluoroethylene 116.5 -28.2 95 20 476 100 1429 300 641.9 1292 1.20E+03

Crotonaldehyde 70.1 102.4 6 2 29 10 143 50 4.8 849.4 2.00E+03

Diketene 82.1 - 3 1 17 5 168 50 - - -

Dimethylamine 45.1 6.9 2 1 184 100 922 500 205.9 650.4 2.77E+03

Epichlorohydrin 92.5 116.4 8 2 76 20 378 100 2.3 1175.1 1.44E+03

Ethyl chloride * 64.5 12.3 - - 13192 5000 - - 160.3 893 1.62E+03

Ethylene dichloride * 99 83.5 - - 405 100 - - 10.6 1247.1 1.31E+03

Ethylene oxide * 44.1 10.5 - - 90 50 901 500 174.4 867.7 2.07E+03

Formaldehyde 30 - 1 1 12 10 31 25 515.6 728.7 2.55E+03

Hexachlorobutadiene 260.8 - 32 3 107 10 320 30 0 1673.9 6.83E+02

Hexafluoroacetone 166 - - - 7 1 339 50 - - -

Hydrogen bromide * 80.9 -66.7 10 3 66 20 248 75 2359.7 1760.3 1.02E+03

Hydrogen chloride 36.5 -85 4 3 30 20 224 150 4812.5 804.9 3.40E+03

Hydrogen cyanide 27 25.7 - - 11 10 28 25 - - -

Hydrogen fluoride 20 19.6 4 5 16 20 41 50 123 983.3 -7.04E+02

Hydrogen sulfide 34.1 -60.3 0.14 0.1 42 30 139 100 2022.4 767.2 2.33E+03

Isobutyronitrile 69.1 - 28 10 141 50 565 200 - - -

2-isocyanatoethyl methacrylate 155.2 - - - 1 0.1 6 1 0 1095.9 1.83E+03

Methacrylonitrile * 67.1 90.3 - - 27 10 - - 9.5 795.5 1.99E+03

11/21/2014 3 / 9 2



ERPGs and Physical Properties

Molecular Boiling ERPG-1 ERPG-1 ERPG-2 ERPG-2 ERPG-3 ERPG-3 Vapour Liquid Heat

Weight Point Pressure Density Capacity

(°C) (mg/m3) (ppm) (mg/m3) (ppm) (mg/m3) (ppm) (kPa) (kg/m3) (J/kg-°C)

Methanol 32 64.5 262 200 1310 1000 6551 5000 17 786.7 2.54E+03

Methyl chloride 50.5 -24.1 - - 826 400 2065 1000 577.3 916.9 1.62E+03

Methyl iodide 141.9 - 145 25 290 50 726 125 - - -

Methyl isocyanate 57.1 - 0.058 0.025 1 0.5 12 5 62 947.8 1.44E+03

Methyl mercaptan 48.1 6 0.01 0.005 49 25 197 100 202.2 857.7 1.89E+03Monomethylamine 31.1 -6.3 13 10 127 100 635 500 349.1 655.9 3.10E+03

Perfluoroisobutylene 218.1 - - - 1 0.1 3 0.3 - - -

Phenol 94.1 181.9 38 10 192 50 770 200 0.1 1070.6 2.05E+03

Phosgene 98.9 7.5 - - 1 0.2 4 1 190.3 1361.7 1.03E+03

Phosphorous pentoxide 141.9 - 5 1 25 4 100 17 - - -

Propylene oxide * 58.1 34.2 119 50 594 250 1782 750 71.9 823.7 2.09E+03

Styrene 104.2 145.2 213 50 1065 250 4259 1000 0.8 902 1.75E+03

Sulfur dioxide 64.1 -10 1 0.3 8 3 39 15 393.6 1352.4 1.41E+03

Sulfuric acid (Sulfur trioxide) 98.1 44.4 2 0.5 10 2.5 30 7.5 - - -

Sulfuryl fluoride * 102.1 - - - 417 100 1252 300 1748 1321 1.50E+03

Tetrafluoroethylene 100 - 818 200 4090 1000 40902 10000 3249.7 880.9 3.48E+03

Titanium tetrachloride 189.7 - 5 1 20 3 100 13 1.4 1715.8 7.43E+02

Toluene diisocyanate * 174.2 252.9 - - 1 0.2 - - 0 1210.8 1.52E+03

Trimethylamine 59.1 2.9 - 0.1 242 100 1209 500 221.5 625.5 2.29E+03

Vinyl acetate 86.1 72.8 18 5 264 75 1760 500 15.3 925.4 1.76E+03

Vinyl chloride * 62.5 -13.8 - - 2556 1000 12781 5000 395.7 903.2 1.55E+03

Vinylidene chloride * 96.9 31.7 - - 198 50 793 200 79.7 1204 1.16E+03

11/21/2014 4 / 9 2



Chemical Exposure Index Calculation

Plant:

Unit of Process Plant:

Calculation by:

Material in case studied Chlorine in pressurised store

Date:

Level 2 Risk Analysis is tr igg ered (Liquid

Release) Diameter of hole mm 50.8

L evel 2 Risk A nalys is is tr igg ered (Gas Release) Diameter of hole mm 50.8

Distance travel by ERPG2 concentration Metres (Liquid

Release)16932

Distance travel by ERPG2 concentration Metres (Gas

Release)3571


Release) Diameter of hole mm 100

L evel 2 Risk A nalys is is tr igg ered (Gas Release) Diameter of hole mm 100


Release)817


Release)891


Release) Liquid release rate L kg/sec 50

L evel 2 Risk A nalys is is tr igg ered (Gas Release) Airborne Gas Release (inventory exhausted within 5

minutes)100


Release) 5245Distance travel by ERPG2 concentration Metres (Gas

Release)3709

Piping release or vessel nozzle release

Hose Release

Overflow or relief when discharge quantity known. Please enter

Chlorination

store V101

Gowland

January 4 2006




Plant:


Calculation by:

Material in case studied

Date:

#VALUE! (Liquid

Release) Diameter of hole mm

#VALUE! (Gas Release) Diameter of hole mm


Release)#VALUE!


Release)#VALUE!

#VALUE! (Liquid




Release)#VALUE!


Release)#VALUE!

#VALUE! (Liquid

Release) Liquid release rate L kg/sec

#VALUE! (Gas Release) Airborne Gas Release (inventory exhausted within 5

minutes)


Release) #VALUE!Distance travel by ERPG2 concentration Metres (Gas

Release)#VALUE!


Hose Release





Plant:


Calculation by:


Date:

#VALUE! (Liquid




Release)#VALUE!


Release)#VALUE!

#VALUE! (Liquid




Release)#VALUE!


Release)#VALUE!

#VALUE! (Liquid



minutes)



Release)#VALUE!


Hose Release





Plant:


Calculation by:


Date:

#VALUE! (Liquid




Release)#VALUE!


Release)#VALUE!

#VALUE! (Liquid




Release)#VALUE!


Release)#VALUE!

#VALUE! (Liquid



minutes)



Release)#VALUE!


Hose Release





Plant:


Calculation by:

Material in case studied 10 minute release of anhydrous ammonia at 7000 kg/hr flow rate

Date:


Release) Diameter of hole mm 50.8

L evel 2 Risk A nalys is is tr igg ered (Gas Release) Diameter of hole mm 50.8


Release)1267


Release)1160

#VALUE! (Liquid




Release)#VALUE!


Release)#VALUE!

#VALUE! (Liquid

Release) Liquid release rate L kg/sec 2

L evel 2 Risk A nalys is is tr igg ered (Gas Release) Airborne Gas Release (inventory exhausted within 5

minutes)



Release)926


Hose Release


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s2s CEI Workbook