PRODUCT - How to find a serial number and test date on a cylinder Cylinder. Cylinders. Serial Numbers. Test Date. Link: https://swagelok.sharepoint.com/:w:/r/sites/SSC_MINN-CSRIAM/_layouts/15/Doc2.aspx?action=edit&sourcedoc=%7Ba79c4359-d999-4f30-a611-d979791b9f31%7D&wdOrigin=TEAMS-MAGLEV.teamsSdk_ns.rwc&wdExp=TEAMS-TREATMENT&wdhostclicktime=1759501976997&web=1