The International Organization for Standardization (ISO). First edition. 2008-04-15. 40p. This part of ISO 4706 specifies the minimum requirements concerning material selection, design, construction
and workmanship, procedure and test at manufacture of refillable welded-steel gas cylinders of a test pressure not greater than 60 bar1), and of water capacities from 0,5 l up to and including 500 l exposed to extreme worldwide temperatures (−50 °C to 65 °C) used for compressed, liquefied or dissolved gases.