System Integrity - DIMP
Requirements & Cross Bores
New DIMP requirements bring new focus to Cross Bore
elimination.
- Distribution Integrity Management Program -
click here for webcast of program background by Michael
Thompson, NAPSR. (7 minutes)
- PHMSA - Regulations require plans to be
submitted by Aug. 2, 2011 by gas distribution utilities
- operators of gas distribution systems for
requirements of 192.1005 -192.1011
- For operators of gas distribution systems
- For requirements of 192.1005 - 192.1011
- Click here for
DIMP Inspection form ( Word format).
Key Elements of DIMP
- Corrosion
- Natural Forces
- Excavation Damage
- Other Outside Force Damage
- Material or Weld Failure
- Equipment Malfunction
- Inappropriate Operation
- And any other concerns that could threaten the integrity of
the pipeline
Cross Bores and DIMP, Same Goals - Safety
- Integrity of gas distribution system is compromised if a cross bore is in a
sewer line
- Subsequent sewer cleaning efforts can cut gas line allowing pressurized
gas to flow into structure with resulting explosion, injury and damage.
- Risk analysis for cross bores is prudent.
- Where a risk of cross bores is determined, often where trenchless
installations have been made, verifications are appropriate
- Proactive evaluation and inspection has been found to be cost effective.
- Where evaluation is appropriate, visual confirmation is most widely accepted
methods. CCTV cameras or potholing have proven effective.
- Data management to offer long term availability of risk evaluations and
verification inspections is essential to a successful program.
