Refill Recharge and Cylinder Testing
Hazards associated with compressed gas cylinders:
All compressed gases are hazardous because of the high pressures inside the cylinders. Gas can be released deliberately by opening the cylinder valve, or accidentally from a broken or leaking valve or from a safety device. Even at a relatively low pressure, gas can flow rapidly from an open or leaking cylinder. Relevant Specifications are Occupational Health and Safety ACT No. 85 SABS 1825 and SABS 019 ISO/IEC 17020 All industrial and medical cylinders are legally required to be high pressure tested to the specification as in SABS 019, Table 9.
Non-corrosive gas (other than acetylene)
Cylinders at a development pressure not exceeding 3500kPa (35 Bar) every 10 years (Internal Inspection and Hydrostatic Test)
At a development pressure exceeding 3500kPa (35 Bar)
Cylinders every 10 years (Internal Inspection and Hydrostatic Test)
If a system has been discharged inspection at 5 years
All high pressure vessels have to be tested according to SABS 1825 and all inspections have to be performed by trained professionals. An accredited test facility, which is in compliance with the SABS 1825 and ISO/IEC 17020, can apply for accreditation by SANAS and will be issued with a SANAS ACCREDITATION NUMBER, which must be prominently displayed on the CYLINDER TEST CERTIFICATE. CYLINDERS may not be tested or certificates of compliance issued by facilities not accredited with SANAS. It is important to remember, this is from "DATE OF MANUFACTURE", not as is sometimes believed "DATE OF PURCHASE" or "FIRST USE". So for example if a cylinder is manufactured May 2007 (05/07) but is only sold in April 2008, the date of first Visual is still MAY 2007 - one month after purchase.
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