Wash. Admin. Code § 296-24-92011 - Internal inspection
(1) You
must ensure that cylinders are inspected internally at least every time the
cylinder is periodically retested. This examination must be made with a light
of sufficient intensity to clearly illuminate the interior walls.
(2) A hammer test consists of tapping a
cylinder a light blow with a suitably sized hammer. A cylinder, emptied of
liquid content, with a clean internal surface, standing free, will have a clear
ring. Cylinders with internal corrosion will give a duller ring dependent upon
the amount of corrosion and accumulation of foreign material. You must
investigate such cylinders . The hammer test is very sensitive and is an easy,
quick, and convenient test that can be made without removing the valve before
each charging. It is an invaluable indicator of internal corrosion.
Notes
Order 73-5, § 296-24-92011, filed 5/9/73 and Order 73-4, § 296-24-92011, filed 5/7/73.
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