Dear Nabilia,
Could you please share the following documents?:
API API/IP STD 1542 : Identification markings for dedicated aviation fuel manufacturing and distribution facilities, airport storage and mobile fuelling equipment
API API/IP SPEC 1581 : Specifications and qualification procedures for aviation jet fuel filter/separators
API API/IP SPEC 1590: Specifications and Qualification Procedures for Avaiation Fuel Microfilters

Thanks in advance