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. 2014 by Navistar, Inc. FEBRUARY 2014 Page 1 of 1 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPEC
2、IFICATION) NUMBER: CEMS F-1 TITLE: Fluid Connections (Liquid/Gas/Hose/Tube) CURRENT ISSUE DATE: FEBRUARY 2014 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: DECEMBER 2013 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This sp
3、ecification 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
4、prior to use. Change Notice: Made VOID. This specification is VOID, and has been replaced by MPAPS F-1. For questions, contact MaterialsEngineeringN VOID This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppli
5、ers are required to assume all patent liability. 2012 by Navistar, Inc. DECEMBER 2012 Page 1 of 8 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECIFICATION) NUMBER: CEMS F-1, APPX TITLE: Fluid Connectors - Appendix CURRENT ISSUE DATE: December 2012 WRITTEN/REVIEWED BY: Materials Engineering
6、APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: April 2012 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated w
7、ith its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits prior to use. Change Notice: Revised cleanliness spec for D15. APPENDIX JOINT DESIGN CHECK SHEET The following check sheet must be filled and approved for e
8、ach joint design. The sheet contains five sections: 1. Hose 2. Connector end one / Connector end two 3. Clamp on end one / Clamp on end two 4. Hose Assembly NUMBER: CEMS F-1, APPX TITLE: Fluid Connectors - Appendix CURRENT ISSUE DATE: December 2012 This document is restricted and may not be sent out
9、side Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2012 by Navistar, Inc. DECEMBER 2012 Page 2 of 8 Design Checklist: Coolant Hose Joints Issue Date: 04/06/2012 Revision Date: NR For Vehicle & Engine Coolant
10、 Hose Connections Engine Program: _ Engineer: _ Reviewing Supervisors Signature: _ Review Date: _ Color Key Code Status GREEN - Within Design Manual requirements G YELLOW-Violation of Design Manual intent Y RED- Unresolved Quality Issue R NOT ACCEPTABLE AT RELEASE Grey - Not applicable to this part
11、N/A White - Work in Progress W NOT ACCEPTABLE AT RELEASE Notes: “*“ Starred items designate a Design, Engineering, and Manufacturing Parameter that, if deviated, requires approval from Seal Technology Group. Bold Italicized Design Parameters are imperatives which may not be violated. All dimensions
12、are in millimeters unless otherwise specified (inch dimensions specified in parentheses) Function: Hoses contain & transfer pressurized coolant at or below the target restriction value. Hoses allow flexibility between 2 fixed components containing coolant passages. NUMBER: CEMS F-1, APPX TITLE: Flui
13、d Connectors - Appendix CURRENT ISSUE DATE: December 2012 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. 2012 by Navistar, Inc. DECEMBER 2012 Page 3 of
14、8 1. HOSE PART NUMBER_ Parameters Description Status Signature (if required) Remarks Design D1 Design Review: Minimize hose joint connections. Perform design review and determine that the hose joint is required. Hose joints should be avoided whenever possible. *D2 Material Selection (for coolant app
15、lications): Confirm material to rated temperatures with Materials Engineering and evaluate the need for external shielding. Evaluate application using maximum of operating, hot soak, and skin temperatures. Measurements to be taken as operating in application. NOTE: If steam is possible in applicatio
16、n, Grade 2 should not be used. *D3 Construction Suffix: Ensure proper suffix (per CEMS D-30) is specified based on hose diameter and application parameters. NOTE: If vacuum is possible in application, suffix D should be considered. *D4 Approved Suppliers: Whenever possible, use approved suppliers pe
17、r CEMS D-30s. In addition, print must have note: “Approved suppliers per CEMS D-30s. No changes without engineering approval.“ Suppliers listed in CEMS D-30s have already been qualified to the parameters of D-30. If other suppliers are selected, they must be qualified. *D5 Pressure Burst Strength: M
18、inimum burst pressure shall be 4X the maximum application pressure. Maximum application pressure implies any possible engine condition including engine overspeed. Application pressure also includes any pressure spikes. NUMBER: CEMS F-1, APPX TITLE: Fluid Connectors - Appendix CURRENT ISSUE DATE: Dec
19、ember 2012 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. 2012 by Navistar, Inc. DECEMBER 2012 Page 4 of 8 Parameters Description Status Signature (if r
20、equired) Remarks Design D6 Minimum Burst Pressure Note: Print must define minimum burst pressure of hose. No additional note required if the hose rating meets the requirements of D5. D7 Reinforcement Definition: Number of plies, stitching pattern and reinforcement material must be defined on print.
21、In addition, a note must be on print stating: “No change to reinforcement material, stitching pattern or number of plies without engineering approval.“ No additional note required if the hose rating meets the requirements of D3. D8 Hose Sizing: Hose must be sized to meet the application flow require
22、ments. Minimize the hose diameter in order to decreases hose stress, improve packagability, and decrease cost. *D9 Hose to Connector Interference: Hose ID to connector OD must always have interference at extremes of tolerances 0.1 mm interference Min. to 1.5 mm interference Max. (Recommended). Robus
23、t joint design requires an interference fit between the hose and the connector. D10 Print Dimensions and Tolerances: Print must define hose ID and tolerance along with wall thickness and tolerance. D11 Hose End Straight Length: For formed hoses, the minimum straight length before any bends or diamet
24、er changes must be specified. Confirm connector length does not exceed min hose end length (both ends) D12 Hose End Squareness: Max allowable hose end squareness must be defined on print. NUMBER: CEMS F-1, APPX TITLE: Fluid Connectors - Appendix CURRENT ISSUE DATE: December 2012 This document is res
25、tricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2012 by Navistar, Inc. DECEMBER 2012 Page 5 of 8 Parameters Description Status Signature (if required) Remarks Design D13 Min
26、imum Bend Radii: For formed hoses, minimum bend radii must comply with CEMS F-1. D14 Hose Packaging Clearances: Require 20 mm nominal clearance to other engine components. Require 35 mm nominal clearance to chassis components (including full engine roll). If clearances do not meet the requirements,
27、a minimum clearance tolerance stack-up is required including expected hose swell. D15 Cleanliness: Print must define CEMS F-2 requirement and proper level must be specified. D16 Hose Alignment and Orientation: Whenever possible hose to be symmetric. If not possible, hose to be designed such that it
28、can only be installed one way. Lastly, if close to symmetric but not symmetric, hose must have some printed alignment mark defining proper orientation. NUMBER: CEMS F-1, APPX TITLE: Fluid Connectors - Appendix CURRENT ISSUE DATE: December 2012 This document is restricted and may not be sent outside
29、Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2012 by Navistar, Inc. DECEMBER 2012 Page 6 of 8 2. CONNECTOR #1 PART NUMBER_ CONNECTOR #2 PART NUMBER_ Parameters Description Status Signature (if required) Rem
30、arks *D17 Connector Style: Connector design must be defined as per CEMS F-1. Specifically Confirm Barb height (recommend 103.5-105%), OD and Connector Length are per standard. D18 Connector Construction: As-cast or as-forged connectors are not allowed. Plastic connectors must not have flash in the s
31、ealing area. D19 Connector Finish: Surface finish to be 3.2 Ra Max. D20 Corrosion Protection: Confirm print defines appropriate corrosion protection, when required. D21 Hose Stops: If a hose stop is used on both connectors, the hose length and tolerance must account for connector to connector variab
32、ility along with hose length variability. D22 Connector to Connector Distance: Must meet requirements defined in CEMS F-1. Maximum connector to connector centerline offset should be compared against hose suppliers max allowable stress requirements. NUMBER: CEMS F-1, APPX TITLE: Fluid Connectors - Ap
33、pendix CURRENT ISSUE DATE: December 2012 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. 2012 by Navistar, Inc. DECEMBER 2012 Page 7 of 8 3. CLAMP #1 PAR
34、T NUMBER_ CLAMP #2 PART NUMBER_ Parameters Description Status Signature (if required) Remarks D23 Clamp Sizing: Verify clamp sized properly for ease of assembly and adequate clamp load. Reference CEMS F-1 for recommendations on Hose-Fitting-Clamp assembly. D24 Clamp Load: Verify clamp design capable
35、 of application pressures. Obtain evidence that initial clamp load is sufficient to seal at max application pressure. NOTE: Mubea style hose clamps not to be used where operating pressures are expected to exceed 50PSI for 1“ ID. Silicone hoses use constant torque style clamp with rounded edges to pr
36、event cutting hose 4. HOSE ASSEMBLY #1 PART NUMBER_ HOSE ASSEMBLY #2 (IF APPLICABLE) PART NUMBER_ HOSE ASSEMBLY #3 (IF APPLICABLE) PART NUMBER_ HOSE ASSEMBLY #4 (IF APPLICABLE) PART NUMBER_ Parameters Description Status Signature (if required) Remarks D25 Hose Clamp Posititioning (Radial & Axial): M
37、ust follow CEMS F-1. Confirm radial & axial clamp placement is acceptable for assembly and service by properly defining printed marking on hose. D26 Clamp Assembly Instructions: For screw type clamps, assembly print must specify torque range and maximum allowable tool speed. Recommend multi stage to
38、rque and/or re-torque procedures to improve consistency of clamp loading. NUMBER: CEMS F-1, APPX TITLE: Fluid Connectors - Appendix CURRENT ISSUE DATE: December 2012 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Stand
39、ards. Suppliers are required to assume all patent liability. 2012 by Navistar, Inc. DECEMBER 2012 Page 8 of 8 D27 Hose Assembly Lubrication: If required, approved lubricants can be used to aid in hose assembly. Approved lubricants can be found in CEMS F-1. Currently approved lubricants include Merpol SH and P-80. Any other lubricants must be approved. D28 Hose Assemblies, No Leak Requirement: For any purchased hose assemblies, print must define EMD-3425 requirement and proper level must be specified.
