API IP Spec 1590-2002 pdf download.SPECIFICATIONS AND QUALIFICATION PROCEDURES FOR AVIATION FUEL MICROFILTERS.
3.1.3 Flow rate Elements with a nominal 150 mm (nominal 6 in.) outside diameter shall meet the performance specification at a minimum flow rate of 10 /sec/m of effective media length (equivalent to 6 l/min/cm or approximately 4 US Gal./min/in). Manufacturers may qualify elements at higher flow rates if they wish. Note: This flow rate is specified for qualification purposes only. Since element life in a given application is a function of both dirt loading and flow rate, it is recommended that the purchaser consult with the microfilter supplier to establish the optimum flow rate/vessel size for that application. For elements with outside diameters different to that specified above it is not possible to prescribe a minimum qualification flow rate. Manufacturers offering such equipment are advised to qualify at a flow rate maximised for the level of influent dirt indicated in 5.4. 3.1.4 Differential pressure The manufacturer shall state the average differential pressure across a new element operating at the qualification flow rate with clean, dry fuel in technical literature intended to communicate differential pressure based change out requirements.
3.1.5 Fluid compatibility of elements The requirements of this publication for compatibility testing (Run 5) are: (a) The difference in existent gum between the blank run and element run shall be no greater than 8 mg/100 cm3. If the difference between the initial blank and the blank after the second 336 hour soak period is greater than 8 mg/100 cm3 then the whole compatibility test run shall be repeated. (b) The water interface rating shall be no greater than 1b. (c) Any colour decrease shall be no greater than 4 Saybolt colour units compared with the blank measured after the total soak time period. (d) There shall be no visual change in the test element. 3.1.6 Structural strength of elements The filter element shall be capable of withstanding a differential pressure of 500 kPa (72,5 psi) (Element structural test, 5.4.6) without element rupture, collapse or bypassing of seals. 3.1.7 Structural integrity Filter elements shall meet Run 1-5 performance tests without showing indications of media or structural deterioration as evaluated by the critical examinations specified in Section 5.
184.108.40.206 Materials of construction All metal parts in contact with the fuel shall be free of zinc, cadmium and copper. Metal components of elements shall be non-corroding. All materials shall be chemically compatible with the fuel. The element media, gaskets and sealing materials shall not deteriorate on exposure to fresh or salt waters. All seals shall be of Viton A, Buna N or equivalent. Under no circumstances is cork or rubber- impregnated cork an acceptable substitute. 220.127.116.11 Element identification Each individual element shall be permanently marked with the manufacturer’ s symbol, element model number and/or the nominal rating of the element (in μm) and the date of manufacture. Where possible, the identity of the element should be located so that it can easily be seen when installed in the vessel. Any materials used to mark the element shall not contribute to the contamination of, or be affected by, aviation fuels. 18.104.22.168 Element packaging ; Elements shall be packaged for shipment so that mechanical damage and contamination by dirt and water are prevented. The packaging shall include element installation instructions including, as a minimum, the recommended element fixing torque and, as necessary, information on fasteners for mounting adapters, end cap nut sizes, etc. 3.2.3 Vessel design and construction 22.214.171.124 General Approval of the mechanical design of a vessel is the responsibility of the purchaser. The purchaser should obtain assurance from the supplier with respect to the performance and design features covered in this Section.