Every rupture disc lot made by Continental Disc Corporation is traceable; the Manufacturing Number (marked on the 3-D Tag or on the device) tells Continental Disc Corporation everything about that rupture disc, including the particular roll of metal it was made from. Supplying Continental Disc Corporation with the manufacturing number ensures that your new order will conform to the specifications of the previous order. Care should be taken, however, to notify Continental Disc Corporation if your process conditions has changed since the last order. For example, if the process temperature was increased 100 degrees Fahrenheit since the last order, the rupture disc materials you are reordering may be inappropriate and should be ordered to current requirements. Continental Disc Corporation will mark any customer-supplied tag number on the 3-D tag, but the Continental Disc Corporation manufacturing number (also on the tag) is what we use to trace a lot of rupture discs.