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Safety and environmental standards for fuel storage sites
Final report
50
Figure 8
Detaill for sheet pile bund wall penetration
198 The BSTG puddle flange arrangement has been used by operators for a number of years. As
long as the space between the pipe and external sleeve remains free from debris, allows visual
examination of the space and the pipe does not come into contact with the sleeve, it will provide
a crevice-free arrangement that is relatively easy to maintain.
199 For the alternative arrangement there is a higher possibility of crevice corrosion between
the pipe and the sleeve packing. For this reason pipe protective coatings and materials should
be carefully selected for this detail and regular inspections should be carried out to ensure that
protective coatings and seal arrangements remain in good condition and corrosion of the pipe is
not taking place.
200 It is recommended that the fire rating of the link seal is carefully considered and future
fire testing should be carried out to confirm the observed suitability of these pipe penetration
arrangements.
Pipe penetrations: existing pipe penetrations
201 The upgrading of existing pipe penetrations to provide a liquid tight, fire proof corrosion free
joint is more difficult to achieve. Any upgrade should be carefully reviewed to ensure that the
upgraded penetration does not affect pipe flexibility and integrity. A summary table is provided
below paragraph 206 outlining the main existing pipe penetrations details and methods of
upgrade.
202 Terminals have utilised several designs for existing pipe penetrations through bund walls.
Some of the methods are shown in Figure 9: straight-through; puddle flange; and sleeved
arrangement. These can be assessed and/or applied based on ALARP principles if the risk is
tolerable.
DETAIL FOR SHEET PILE
BUND WALL PENETRATION
Modular bolt compressible
seal (inside face
of bund wall)
Jacket pipe
Sheet piling
TANKPIT SIDE
Metal split collar fire
protection plates (removeable)