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Safety and environmental standards for fuel storage sites
Final report
48
194 Top entry pipes can be considered for filling tanks to avoid wall penetrations. For tanks that are
emptied on a regular basis however this should be avoided as splash filling cannot be avoided at the
start of the filling operation. This is particularly important where flammable static-generating products
are being handled.
Pipe penetrations: new builds/major upgrade work
195 The BSTG puddle flange design (as shown in the following figures) inherently provides fire
resistance and offers industry a sound design.
Figure 4
Example puddle flange cast into a bund wall
Figure 5
Example puddle flange for 14” BS pipe
250NB ANSI 150LB C/S
RF. blind flange drilled
to suit 200NB 219 mm
O/D pipe in the CL of flange
250NB ANSI
150LB C/S
RFSO flange
C/S plate puddle flange 6 mm THK
406 mm O/D drilled to suit 250 NB
273 mm O/D pipe in the CL of flange
500
250
INSIDE OF
BUND WALL
INSIDE OF
BUND WALL
250NB SCH.30 AP1 5L
Grade B C/S pipe
Pipe welded to flange
to form an anchor/seal
250
Bund
250
372
550
INSIDE OF
BUND WALL
OUTSIDE OF
BUND WALL
(Pump raft)
ø355,6
14”NS pipe
ø406,4
16”NS pipe SCHED.30
ø597
ASA 150# flange
16”-ASA150# Blind flange
Bored to suit 14”NS pipe
Flange welded to line pipe
with complete fillet weld
(by MECH)
Puddle plate bored to suit
16”NS pipe and welded
where shown
16”-ASA150# SORF flange
Welded to puddle pipe