1、This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. AUGUST 2009 Page 1 of 5 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECIF
2、ICATION) NUMBER: CEMS BT-47 TITLE: Stability Test For Distillate Fuel CURRENT ISSUE DATE: August 2009 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: October 2001 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specificati
3、on may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits prior to
4、use. Change Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This method covers a procedure to determine stability of distillate fuels under accelerated oxidizing conditions. 2.0 APPARATUS 2.1 A bath capable of maintaining the tes
5、t temperature within + 2F (1C). 2.2 Analytical balance with a sensitivity of 0.1 mg. 2.3 Test cell - Pyrex glass test tube, 38 x 300 mm with Ts 34/45 standard female ground joint. 2.4 Condenser - Allihn type, Pyrex glass, 300 mm jacket with Ts 34/45 standard male ground joint to fit test cell. 2.5 A
6、ir tube - Pyrex, H.S. Martin M-23640-EC, or equivalent (see Figure 1). 2.6 Ring rod - (see Figure 2). 2.7 Plastic or stainless steel forceps. 2.8 Flowmeter capable of measuring 50 + 5 ml of clean, dry air per minute. 2.9 Apparatus to measure color per ASTM D 1500. 2.10 Apparatus and materials to det
7、ermine insoluble by filtration per ASTM D2276, Appendix A2. 2.11 Glass or stainless steel hooks. 3.0 MATERIAL 3.1 Copper, cold rolled sheet, deep drawing annealed, Alloy 110 per ASTM B 152, (CA 110 per SAE J463) or Type 110 per Navistar CEMS C-3. See Figure 3 for dimensions. 3.2 Flushing fluid, Petr
8、oleum Ether, 30 to 60C. 3.3 Isopropyl alcohol, reagent grade. 3.4 Alundum, 90 mesh, RR Crystalline, Blue Label. 3.5 Rubber or plastic gloves. 3.6 Cleansing tissue, Kleenex or equivalent. 3.7 Cotton, absorbent non-sterile. 4.0 PROCEDURE 4.1 Measure and record color of test fluid as received per ASTM
9、D 1500. 4.2 Clean two copper specimens (handle with gloves) using cotton moistened with isopropyl alcohol and dipped in alundum. Use enough pressure to remove all surface imperfections or films which NUMBER: CEMS BT-47 TITLE: Stability Test For Distillate Fuel CURRENT ISSUE DATE: August 2009 This do
10、cument is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. AUGUST 2009 Page 2 of 5 may be present. Handle the specimens with plastic or stainless st
11、eel forceps and rinse with isopropyl alcohol. Allow the specimens to dry on glass or stainless steel hooks. Wipe both sides of the specimens with tissue to remove any grains of alundum which may be adhering to the surface. 4.3 Assemble the ring rod on the air tube and place the copper specimens on t
12、he ring rod hooks opposite of each other, see Figure 4. Place the air tube assembly into the test cell. 4.4 Add 125 ml of the test fluid to the test cell. Install the condenser and place the test assembly in the bath maintained at the test temperature in such a manner that the top of the fluid in th
13、e test cell is at least 25 mm below the surface of the heating medium, (see Figure 5.) Start clean, dry air through the cell and adjust the flow rate to 50 + 5 ml per minute. Start flow of water through the condenser. 4.5 At the end of the test period, shut off the air and water and remove the test
14、assembly from the bath. Remove the specimens and allow the test fluid to stand at room temperature for one hour. 4.6 Filter and collect all the fluid from the test cell using a vacuum of 10 + 0.5 in. (255 + 15 mm) of mercury per ASTM D 2276, Appendix A-2. Remove the filtrate for color determination.
15、 Then wash the residue in the test cell on to the filter membrane with four 50 ml portions of petroleum ether. Proceed with ASTM D 2276 Section A2.8.3.4. Weigh the amount of sediment to the nearest milligram and visually determine, then record the color of the sediment. 4.7 Measure and record the co
16、lor of the filtered test fluid per ASTM D 1500. 5.0 REPORT 5.1 Color of test fluid per ASTM D 1500, before and after test. 5.2 Weight in milligrams of sediment collected on membrane filter disc. 5.3 Color of sediment on membrane filter disc; tan, grey, brown, black, etc. NUMBER: CEMS BT-47 TITLE: St
17、ability Test For Distillate Fuel CURRENT ISSUE DATE: August 2009 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. AUGUST 2009 Page
18、3 of 5 NUMBER: CEMS BT-47 TITLE: Stability Test For Distillate Fuel CURRENT ISSUE DATE: August 2009 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009
19、by Navistar, Inc. AUGUST 2009 Page 4 of 5 NUMBER: CEMS BT-47 TITLE: Stability Test For Distillate Fuel CURRENT ISSUE DATE: August 2009 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. AUGUST 2009 Page 5 of 5
