Chubb PEFS F3, Руководство по обслуживанию, Страница: 46 / 47

Maintenance Manual 46
PEFS F3 Maintenance Manual, Version 1.2, Feb 2018
© Copyright 2017 Chubb Fire & Security Pty Ltd
AS2337 Cylinder Visual Inspection Damage Limits
Name Definitions and illustrations
(with limits)
Limits and treatment
General C23 C30 C45 C65 C106
Bulge A swelling of the cylinder or vessel wall. Condemn where measured
circumference varies by more
than 1% between any two similar
sections of the cylinder. Variance
6.9mm Variance
10.1mm Variance
11.4mm Variance
11.4mm Variance
11.4mm
Dent A blunt impression where the surface
material has not been penetrated. Condemn where
––
(a) the depth of dent exceeds
10% of the average dent
diameter
(b) the average diameter of dent
exceeds 25% of the cylinder
diameter; or
(c) the dent impinges on a weld
and it exceeds 6.5 mm in depth
Average dent diameter B is
taken to be (y + x)/2
Dent OD
55mm Dent OD
80.5mm Dent OD
91mm Dent OD
91mm Dent OD
91mm
Dig A sharp impression where the surface
material has not been penetrated. Condemn where length of dig
exceeds 75 mm, or the depth of
the dig exceeds 25% of the
original wall thickness. Depth 0.5mm Depth 0.5mm Depth 0.5mm Depth 0.5mm Depth 0.5mm
Cut
(gouge)
A sharp impression where the surface
material has been penetrated. Condemn where the length of cut
exceeds 75 mm, or the depth of
the cut exceeds 25% of the
original wall thickness. Depth 0.5mm Depth 0.5mm Depth 0.5mm Depth 0.5mm Depth 0.5mm
Pit Local corrosion which does not exceed
6.5 mm mean diameter and is not nearer
than 85 mm to any other local corrosion. Condemn where depth of the pit
is greater than 50% of original
wall thickness. Where the
distance between adjacent pits is
less than 85 mm, treat as
general corrosion. Depth 1mm Depth 1mm Depth 1mm Depth 1mm Depth 1mm
Line
corrosion or
linear wear
or abrasion
Corrosion in a line and not wider than 6.5
mm at the surface.
NOTE: Line corrosion occurs most
commonly at a junction with an
attachment such as a foot-ring.
Condemn where the length
exceeds 75 mm, or the depth
exceeds 25% of the original wall
thickness. Depth 0.5mm Depth 0.5mm Depth 0.5mm Depth 0.5mm Depth 0.5mm
General
corrosion
Any corrosion more extensive than pit or
line corrosion. Condemn where mass check in
accordance with AS2337.1
Section 8 is failed, or where
depth of corrosion exceeds 25%
of the original wall thickness. Depth 0.5mm Depth 0.5mm Depth 0.5mm Depth 0.5mm Depth 0.5mm
Cracks A crack or rift in the metal. Condemn (see AS2337.1 Appendix H)
Gas
leakage
Any gas leakage through the cylinder, or
at the valve due to damaged or worn
cylinder neck threads.
NOTE: Areas around the base of the
cylinder are particularly susceptible to
gas leakage. Condemn where any leak is detected.
Where leakage is suspected, the cylinder shall be pressured to working pressure and either submerged in a water bath or
bathed with soapy water, and observed to determine whether or not leakage occurs.
Cylinders which have leakage due to damage to threaded openings may be repaired, provided that this is permitted by
AS2030.1 and the cylinder specifications. Otherwise, such cylinders shall be condemned.
Burns A localized heat-affected region of the
cylinder wall.
NOTE: Burns may result from contact
with an electric arc or an oxygen-
acetylene flame. Where surface damage is evident, either the cylinder shall be condemned or the affected surface ground smooth and any
remaining cuts and pits treated in accordance with ‘cut (gouge)’ and ‘pit’. Where the limits are not exceeded, the cylinder shall
then be re-heat treated in accordance with AS2337.1 Clause 9.4, and then hydraulically pressure tested in accordance with
AS2337.1 Section 7. For cylinders with heat affected regions but no evidence of surface damage, treat as fire damaged as
specified in ‘Fire damage’ below.