Control of Volatile Organic Compounds Emissions from Manufacturing

ased on an equation in the Chemical Engi neer's -~andbbok41 and simpli fied
as suggested by Chontos.42,43~44 The next larger size (inner diameter')
of schedule 40 pipe was selected unless the calculated size was within
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10 percent of the difference between the next smaller and next larger
standard size. For flows of 700 scfm and greater, duct sizes were
calculated assuming a velocity o f 2,000 fpm for flows of 60,000 acfm
or less and 5,000 fpm for flows greater than 60,000 acfm. Duct sizes
that were multiples of 3-inches were used.
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E.6.2 Piping and Ducting Cost Estimation Procedure -
Pipi ng costs were based on those given in the Richardson Engineering
Services Rapid Construction Estimating Cost systed8 as combined for
70 ft. source legs and 500 ft. and 2,000 ft. pipelines for the cost
analysis of the Distil lation NSPS.~~(see Tables E-18 and E-19)
Ducting costs were calculated based on the instal led cost equations 1
,
given in the GARD Manual -46 (See Tab1 e E-20 .)
Costs of source legs were taken or calculated directly from the
tables. Costs of pipelines for flares were intei-poldteb for 'the safe'
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pipeline lengths differing by Lore than 10 pkrcen* from the itandard
lengths of 70, 500, and 2,000 ft. Installed were updated
to June 1980 using the Chemicil Engineering p and fittings
index for pi ping and the fabricated equipment index for ducti ng.
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*