The Distribution Integrity Management Program (DIMP) Frequently Asked Questions have been posted on the PHMSA website recently. [Last Revised July 28, 2008] Click here to view the answers provided to the FAQs listed below.
General
FAQ-1. Why is PHMSA proposing integrity management requirements for distribution pipeline systems?
FAQ-3. Why aren’t distribution pipeline operators required to physically inspect their pipelines as are operators of other types of pipelines?
FAQ-11. Must an operator follow the Gas Piping Technology Committee (GPTC) DIMP guidelines?
FAQ-22. Why has PHMSA selected the performance measures that it has for periodic reporting?
Proposed Rule Scope
FAQ-2. Why aren’t the proposed distribution integrity management requirements focused on high consequence areas?
FAQ-4. Why are master meter and LPG system operators proposed to be subject to different requirements?
FAQ-12. The proposed rule requires that an operator know its system. Must an operator excavate simply to gather information about parts of its system where it may not now have complete knowledge?
Mitigating Risks
FAQ-5. Why not simply require distribution operators to replace old, risky pipe?
FAQ-14. Must an operator implement new actions to reduce risk from its pipeline?
FAQ-18. If an operator already has a leak management program, do they have to implement a new program in response to this proposed rule?
Excess Flow Valves
FAQ-6. Why are Excess Flow Valves included in integrity management requirements?
FAQ-8. Will an operator have to retrofit excess flow valves into existing service lines?
FAQ-9. Will excess flow valves provide protection for gas line breaks inside a residence?
FAQ-10. Will an operator still have to notify customers of the availability of excess flow valves after the final rule becomes effective?
Threat / Risk Analysis
FAQ-13. Must an operator use a computer-based risk analysis model?
FAQ-17. How will small operators, with limited staff, be able to implement the requirements for risk analysis and selection of risk control measures?
Reducing Intervals for Periodic Requirements
FAQ-15. May an operator reduce activities now being undertaken to comply with regulations if it finds that other actions would have a greater effect on reducing risk?
FAQ-16. How can operators use their DIMP programs to justify reductions in other periodic requirements?
Plastic Pipe
FAQ-20. Why is PHMSA proposing to require that plastic pipe failures be reported to PHMSA?
FAQ-21. Why is PHMSA seeking comments on marking of plastic pipe?
Performance through People (PTP)
FAQ-23. What is PTP, as referred to in the preamble to the proposed rule?
FAQ-24. What is PTP’s relationship with DIMP?
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