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NEW Recommended Practice Published: API RP 1182, Construction, Operation and Maintenance of Large Diameter Rural Gas Gathering Lines

The American Petroleum Institute (API) announced it has published a new recommended practice (RP) for rural gas gathering pipelines with outside diameters (OD) greater than 12.75-inches.  This RP is expected to be incorporated by reference into Part 192 when the Safety of Gas Gathering Pipelines rule is finalized by PHMSA. 

API RP 1182 creates two new categories of rural gas gathering lines.

  • Type C is a gas gathering line with the following attributes
    • Not categorized as a Type A or B gas gathering line
    • OD greater than 16-inches
    • MAOP >20% SMYS for metallic lines or MAOP >125 psig for non-metallic line
    • Gas gathering lines with OD’s between 12.75 and 16 inches and contains a building intended for human occupancy or “other impacted site” within 660-feet or within the pipeline’s potential impact radius (PIR)
  • Type D is a gas gathering line with the following attributes
    • Not categorized as a Type A or B gas gathering line
    • MAOP <20% SMYS for metallic lines or MAOP <125 psig for non-metallic line
    • OD is between 12.75 and 16 inches and does not contain a building intended for human occupancy or “other impacted site” within 660-feet or within the pipeline’s potential impact radius (PIR)

The RP defines an “other impacted site” as a small, well defined outside area (such as a playground, recreation area, outdoor theater, or other place of public assembly) that is occupied by 20 or more persons, on at least 5 days a week for 10-weeks in any 12-month period (the days and weeks need not be consecutive) and freeways, interstates, or other principal 4-lanes or more arterial roadway.

Once Type C and D gas gathering lines have been identified, the RP outlines practices pipeline operators should take for the following.

  • Design, construction and testing for new gathering pipelines
  • Corrosion control on new and existing Type C gathering lines
  • MAOP for Type C and type D gathering lines
  • Operations and maintenance for Type C and Type D gathering lines
  • Conversion of service
  • Change of service
  • Acquisitions

For more information regarding this RP, contact Jessica Foley.