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NAR Hardware Subcommittee

NAR Hardware Subcommittee. Wednesday, October 11 th 2006. NAR Hardware Subcommittee. New Chairman – Joe Perez 5 Docket Task Forces, 0 New TF 1 Docket Task Force will present recommendations 2 Previously Closed in April ’06- No Recommendations. NAR Hardware Subcommittee Docket Structure.

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NAR Hardware Subcommittee

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  1. NAR Hardware Subcommittee Wednesday, October 11th 2006

  2. NAR Hardware Subcommittee • New Chairman – Joe Perez • 5 Docket Task Forces, 0 New TF • 1 Docket Task Force will present recommendations • 2 Previously Closed in April ’06- No Recommendations

  3. NAR Hardware SubcommitteeDocket Structure

  4. NAR Hardware Team – I.F.A.R.R. • ISSUEs – Issues established with discussions by subcommittees • FACTs – What does the data show? Deal with the facts!! • ANALYZE – What is the root cause of the component’s NAR. Is the problem really attributable to the design of the component? • RECOMMENDATIONs - Develop potential conceptual solutions addressing the root cause. What can be done to the component to ensure it does not leak? • RESULTS - NAR Subcommittee makes recommendation to AAR TCC to start a Task Force to look at potential new requirements

  5. NAR Hardware SubcommitteeNH-2005.2 Hinged & Bolted MW Covers Actions • Push for torquing standards through other subs. – NOT Established Further Discussion/Investigation/Research • Recommend or mandate use of softer gasket mat’ls • Recommend the use of 8 bolt manway covers • Reduce the use or eliminate the use of classic hinged and bolted manway covers

  6. NAR Hardware SubcommitteeNH-2005.2 Hinged & Bolted MW Covers Elimination of H & B manway covers • Query shippers on need for convenient use of the manway cover. • Frequency of opening • Splash loading vs. closed loop • Venting purposes • Tank entry, Cleaning, and Visual Inspection access • Suggested distribution of ACC & API members for survey. • IS THERE A NEED FOR H&B MANWAY??

  7. NAR Hardware SubcommitteeNH-2005.3 Shear Plane Arrangement Actions • Use of gaskets that allow for centering and better sealability (e.g. pinwheel gaskets) with fasteners and arrangements that accommodate shearing of the valve to nozzle connection Closed in April '06

  8. NAR Hardware SubcommitteeNH-2005.4.1 Eliminate VRVs Actions • Decision to allow car manufacturers and owners continue to require Vacuum Relief Valves as standard on non-pressure cars. Shipper can request their elimination based upon knowledge and control of the operation of the cars. Closed in April '06

  9. NAR Hardware SubcommitteeNH-2005.4.2 VRV Design Concerns NAR Trend 2001 -2005 * Estimated

  10. NAR Hardware SubcommitteeNH-2005.4.2 VRV Design Concerns • MANY Potential Recommendations. • Provide design that is less prone to leak in a roll over condition • Enhanced Seal Design – Quad Seal Rings vs. O-Rings • Review Test Protocol for New Valves (Reseating Capabilities) • Use of Corrosion Resistant Seats/Valves (e.g. Stainless Steel) • Providing the Stem Profile Below the Body Casting • Tying the Cap to the Valve Body and not the Stem • Investigate whether higher Vacuum Rating Pressures may assist the seating and reseating characteristics of the valve

  11. NAR Hardware SubcommitteeNH-2005.4.2 VRV Design Concerns • WHERE TO FOCUS? No progress on recommendations • VRV NAR is not high compared to other NARs on NON-Pressure cars • Still warrants subcommittee to move forward on recommendations, but WHICH ONE

  12. NAR Hardware SubcommitteeNH-2005.4.2 VRV Design Concerns WHERE TO FOCUS? 2003-2005 Causes

  13. NAR Hardware SubcommitteeNH-2005.5 Threaded Connections • Rich Phelps

  14. NAR Hardware SubcommitteeNH-2006.1.1 PRDs Springs on AA Cars Proposal: Mandate the use of a Corrosion Resistant Spring on an AA PRD (was written as Aluminized) Background: SCC issues on carbon steel springs in AA service DOCKET T90.13 ALREADY EXIST Research and Data: • Stainless steel (or other alloys) springs • Other protection (coatings, etc.) • Increased inspection intervals • Enhanced inspection techniques • Lower O2 levels in tank (N2 pads) • Lower stress levels in springs

  15. NAR Hardware SubcommitteeNH-2006.1.1 PRDs Springs on AA Cars • AAR/BOE database – the use of aluminized, SST (or other alloy) springs, protective coatings can not be queried. • Also inspection intervals, enhanced inspection, Oxygen level in cars can not be queried. • Low Activity from this subgroup

  16. NAR Hardware SubcommitteeNH-2006.1.2 PRDs (Valves) O-Rings Discussion: Issues with O-Rings in service on PRDs (Valves) Research and Data: Where is the problem? • Deterioration • Misalignment • Missing • Incompatible • Incorrect Size Low Temperature capabilities of common elastomers

  17. NAR Hardware SubcommitteeNH-2006.1.2 PRDs (Valves) O-Rings

  18. NAR Hardware SubcommitteeNH-2006.1.2PRDs (Valves) O-Rings • AAR/BOE Database – O-ring material can not be queried. Can not conclude, unless shippers/owners provide the information. • What causes deterioration? Need to investigate • Qualification Dates (age of O-ring) – Need to investigate. • Low Temperature capabilities of common elastomers • DuPont (Chief Engineer) consultant added to team

  19. NAR Hardware SubcommitteeDocket Structure

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