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HISTORY BACKGROUND DOCUMENT IP 8-1-1
Cooling Towers Page 1 of 1
Rev. 0 June 1997
THIS INFORMATION FORAUTHORIZED COMPANY USE ONLYEXXON RESEARCH
AND ENGINEERING COMPANY FLORHAM PARK, N.J.
INTERNATIONAL
PRACTICE
BACKGROUND HISTORY DOCUMENTATION
FOR CORRESPONDING PARAGRAPHS OF IP 8-1-1 (REV. 0)
R,E [H] 4.2 CTI STD WMS-112 procedures minimize the leaching of
treatment chemicals.
E [H] 5.10 Drift from cooling tower contains chemicals which can
deposit locally causing corrosion. Otherspecialized concerns are
fogging and freezing of water droplets escaping from tower. Lower
levels can beobtained with attendant high costs.
M,S [H] 5.14 Minimum fan stack height is to protect personnel on
fan deck from reaching over top of fan.
S,O [H] 5.18 Vent on return piping required to prevent surge due
to heat exchanger tube failure of high pressurehydrocarbon causing
return piping rupture. Two instances at Syncrude Refinery resulted
in extensivedamage and fire.
M,S [H] 5.21 Required egress from fan deck in emergency
situations.
R,S[H]
5.25 Guards are needed to prevent the typically long driveshafts
provided for cooling tower fans from flyingand to prevent against
coupling failure.
R,S [H] 5.28 Vibration monitor to avoid catastrophic damage
caused by 20+ ft fan blades restrained only by fiberglassfan stack.
Alternative for monitoring system in lieu of switch provided.
R,S [H] 5.30 Note to highlight exposure requirements for
electrical equipment.
Notes:
(1) Each paragraph to identify the Purpose Code(s) of the
corresponding paragraph number of the applicable International
Practice (IP).
(2) The symbol [H] shall be used to denote all History
Background Paragraphs which are for INFORMATION ONLY.
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