Page 520
CHAPTER 5
May/12
9107
SERVICE MANUAL
CHAPTER 5
Page 520
Feb/11
283
SERVICE MANUAL
ISO 9650
4.10.2 Chemical leak testing
Testing for leaks must be carried out as follows, as per Method A or
Method B:
Method A. 30-day quarantine period
(a) Check the weight of the cylinder at regular intervals during the
30-day quarantine period.
(b) After thirty (30) days the weight must be the same as when it
was first filled.
(c) If the weight has decreased, corrective action must be taken
and the above process repeated.
WARNING:
A CHARGED CYLINDER SHOWING LOSS OF WEIGHT,
CANNOT BE USED IN SERVICE.
(d) If weight is the same, the cylinder can be used in service.
Method B. Chemical leak test
(a) Before the gas cylinder is chemically leak tested, the mass
of the gas in the cylinder is to be recorded, ensuring that it is
within the limits specified in the service manual.
If there is insufficient gas in the cylinder, and/or a leak is de-
tected, corrective action should be taken to determine the cause
of the leak.
PTFE tape wrapping (Leaf eld)
Cylinder adaptor
PTFE tape
Plated
Unplated
Part No.
58-06168009
12 wraps
12 wraps
Description
12 mm wide × 0.076 mm thick
Part No.
58-5X3117
6-8 wraps
8-10 wraps
Description
3/4:
” wide × 0.002”-0.0025” thick
PTFE tape wrapping
TABLE 504
