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API API/EI 1585 Document Information:
Title
Guidance in the cleaning of aviation fuel hydrant systems at airports
American Petroleum Institute
Publication Date:
Nov 1, 2007
Scope:
INTRODUCTION
This publication is intended to give operators of airport fuel
hydrant systems guidance in:
Determining the state of cleanliness of existing hydrant systems
and possible causes of contamination.
Methods of cleaning hydrant systems that are showing signs of
contamination with particulate material, water and microbiological
material.
Methods to be followed during construction of new systems or
extensions to existing systems to prevent the entry of unwanted
materials.
Commissioning procedures.
Operational practices to maintain the system in a clean
condition.
The design of hydrant systems to aid cleaning.
If the hydrant system is clean when placed in service and
adequate filtration is given to the fuel entering it, the hydrant
should remain clean in service. In general, only if users are
experiencing shorter than normal fuelling vehicle filter element
life, or are obtaining unsatisfactory samples upstream of their
filters, need action be taken. It should be recognised that
submicronic particulate will never settle and will eventually be
carried to the users' vehicles. On the other hand, larger debris
may never come out so ensuring that none is present is the best way
of preventing problems. Such material in the system may provide an
environment to trap moisture and promote microbiological
growth.
The key to successful cleaning of supply lines and hydrant
systems is to fully understand the subject facilities and to
develop a detailed implementation plan with objectives, expected
results and how the results will be measured. Hydrant operators
should formulate their own procedures, which should be incorporated
in manuals and operating procedures. In order to assist, it is
essential that 'as built' drawings and associated records are
produced after initial construction and that these are kept
up-to-date following any subsequent modification.
Training is very important; hydrant operators should be properly
trained to recognise signs of trouble and to act upon information
and advice regarding fuel quality and the state of pits etc. from
hydrant users.
It cannot be too strongly stressed that the key is to
ensure that the hydrant system is clean in the first
place.
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