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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

Wednesday, October 11th 2006


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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


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NAR Hardware SubcommitteeDocket Structure


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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


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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


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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??


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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


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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


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NAR Hardware SubcommitteeNH-2005.4.2 VRV Design Concerns

NAR Trend 2001 -2005

* Estimated


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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


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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


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NAR Hardware SubcommitteeNH-2005.4.2 VRV Design Concerns

WHERE TO FOCUS? 2003-2005 Causes


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NAR Hardware SubcommitteeNH-2005.5 Threaded Connections

  • Rich Phelps


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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


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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


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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


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


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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


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NAR Hardware SubcommitteeDocket Structure


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