NAR Hardware Subcommittee

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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
  components 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 matls
• 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 HB 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-2006.1.2 PRDs
(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