TK554 or TK555 is not certified to NFPA or EN standards. If the tender requirement is to have NFPA or EN certification, try to propose TK612 instead. TK612 is certified to NFPA 1994 Class 2. It is more expensive than TK554 but I believe it is still quite competitive than our competitors in terms of pricing.
Attached herewith the certificate of TK612. Also attached herewith the TK554 technical details anyway.