No
For items of pressure equipment manufactured in batches or series (such as portable extinguishers or valves) the identification may be limited to the batch or series number. It is not always necessary to provide an individual serial number on each item of pressure equipment.
Note:
1. When a national authority applies the safeguard clause the decision will relate to all products belonging to the same batch or series. Similarly if a manufacturer withdraws non-compliant or defective products from the market this will relate to all products belonging to the same batch or series.
2. Sufficient identification shall be possible according to the nature of the equipment.