20 EI 1581 5th Edition Specification Summary EI 1581 5th Edition Specification* Key Points 1. Category “C” filter/ separators are for use in commercial Jet-A or Jet-A1 fuel are tested in fuel containing anti-static additive Stadis 450 and corrosion inhibitor DCI-4A. 2. Category “M” filter/ separators are for use in military JP-8 or JP-5 fuel. They are tested in fuel containing Stadis 450, DCI4A, and anti-icing additive Di-EGME. (Note: testing to Category “M” also qualifies for Category “C”.) 3. Category “M100” filter/ separators are for use in military JP8+100 fuel. They are tested in fuel containing Stadis 450, DCI4A, Di-EGME, and thermal stability additive Spec Aid 8Q462. 4. Type “S” filter/separators are used at filtration points where significant levels of both dirt and water can be expected. (Note: testing to Type “S” also qualifies for both Type “S-LD” and Type “S-LW”.) 5. Type “S-LD” filter/separators are used at filtration points where significant levels of water but minimal amounts of dirt can be expected. 6. Type “S-LW” filter/separators can be used for mobile applications where minimal amounts of water can be expected in the jet fuel. 7. Multi-Stage Systems can be used at all filtration points in addition to filter/ separators where additional performance is desired. Multi-stage devices can include upstream pre-filters and downstream water absorbing filters. 8. The EI specification procedures qualify the entire filter/separator, not just the elements. Elements are used in an EI qualified filter/separator but the qualification would apply to the corresponding elements and vessels as a whole. 9. A filter/separator of similar geometry to the tested vessel can be qualified by similarity providing that a complex set of criteria are met. This is particularly significant in establishing EI qualification for existing equipment in the field. EI Specification 1582** details the similarity specifications that have to be met in order for a filter/separator to be qualified by similarity. 10. In order for a filter/separator to be accepted as meeting the EI specification, it must be tested to the specification with an official witness designated by the EI committee present. This witness ensures that all procedures are followed per specification and that all test results meet the specification requirements. EI then issues a qualification approval for the: a. Elements b. Housing c. Flowrate d. Fuel Category * EI Specification 1581, Fifth Edition, “Specifications and Qualification Procedures for Aviation Jet Fuel Filter/ Separators”, July 2002. Addendum 20th Dec. 2006: Added to section 3.2.2.7 – vessel sump design must allow for water drainage – flat sumps are not allowed. ** EI Specification 1582, “Specifications for Similarity For API/IP 1581 Aviation Jet Fuel Filter/Separators”, February, 2001 Category C Commercial Type S Type S-LD Type S-LW Category M Military Type S Type S-LD Type S-LW Category M100 Military w/+100 Type S Type S-LD Type S-LW EI SPEC 1581
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