SAFETY HEADS. THESE ARE SPECIALISED STEEL FITTINGS FOR HOLDING BURSTING OR RUPTURE DISKS ONTO PIPE SYSTEMS OR PRESSURE VESSELS. THE DISKS WHICH ARE NOT THE SUBJECT OF THIS BTI ARE THIN PIECES OF METAL USED AS SAFETY DEVICES. THE DISKS BURST AT A SPECIFIC PRESSURE

GENERAL RULES 1 AND 6 FOR THE INTERPRETATION OF THE COMBINED NOMENCLATURE. THE TEXT TO TARIC CODES 7326, 7326 90, 7326 90 98 AND 7326 90 98 90. THE HARMONISED SYSTEM EXPLANATORY NOTES TO HEADING 7326.