CREOSOTIXG ri..lMS FOR TREATING CHESTNUT I'Ol.ES 2?<S 



time in tlu- IriMtiiiK tanks, thus rtsultinj; in lonsidirably li-ss steam 

 hoiler capacity thin would l>c necessary with a very lar^e single 

 treating tank unit. 



HandHnK poles .il smaller tanks is nuicli f,i>ier liec.ni>c less 

 l)<M)in action of the derrick is required and the men at the tanks can 

 reach all |)oles more easily for attaching and removinR the derrick 

 winch line. 



It was found that a \eriic.il c\ lintlric.il I. ink served hetter ih.m a 

 horizontal one for the storage of hot oil, while the horizontal c>lindrical 



,1 I'uK- R.ick 



tanks were preferable for cold oil storage. The radiation from a 

 vertical hj)t tank is i-onsitierably reduced l)y the jacket of hot air 

 rising ak)ng its side. 



Particularly during the summer months care must l)e taken to 

 keep dowi\ the temperature of the c(jld oil. It has been found that 

 the long cylindrical steel tanks when lying horizontally radiate heat 

 frf)m the oil to the atmosphere satisfactorily and thus keep the oil 



CCX)1 . 



Care has been taken in the design, to locate the various units so 

 that all hot oil leads would be as short as possible in order to minimize 

 radiation. Wherever jjossible, both the hot and cold oil are handled 

 by gravity. The steam boiler is located as near as practicable to 

 the heavy banks of steam radiators. 



Fn all cases, careful study has been gi\'en to facilitating the handling 

 of poles, since a considerable part of the cost of the pole treating 

 process is due to pole handling. 



