| Phillips 66 Pipeline coastal use permit P20100505 pipeline | Phillips 66 Pipeline LLC | LA | | |
| Phillips 66 Pipeline coastal use permit P20110059 pipeline | Phillips 66 Pipeline LLC | LA | | |
| Phillips 66 Pipeline coastal use permit P20120197 pipeline | Phillips 66 Pipeline LLC | LA | | |
| Phillips 66 Pipeline coastal use permit P20140794 pipeline | Phillips 66 Pipeline LLC | LA | | |
| Phillips 66 Pipeline coastal use permit P20141302 pipeline | Phillips 66 Pipeline LLC | LA | | |
| Phillips 66 Pipeline coastal use permit P20150901 pipeline | Phillips 66 Pipeline LLC | LA | | |
| Phillips 66 Pipeline coastal use permit P20210811 pipeline | Phillips 66 Pipeline LLC | LA | | |
| Phillips Petroleum coastal use permit P19951348 pipeline | Phillips Petroleum Co | LA | | |
| Phillips Petroleum coastal use permit P19960747 pipeline | Phillips Petroleum Co | LA | | |
| Phillips Petroleum coastal use permit P19970722 pipeline | Phillips Petroleum Co | LA | | |
| Phoenix Expansion-Phoenix P/L / San Juan '08 Exp | Transwestern Pipeline Company, LLC | AZ, NM | In service 2009 | |
| Phoenix Exploration coastal use permit P20100585 pipeline | Phoenix Exploration Company | LA | | |
| Phoenix Exploration coastal use permit P20110398 pipeline | Phoenix Exploration Company | LA | | |
| Piceance Compression Expansion Project | Wyoming Interstate Gas Co | | In service 2009 | |
| Piecance Basin Expansion Project | Wyoming Interstate Company, L.L.C. | CO, WY | In service 2006 | |
| Pierce Junction Crude Oil Project | | TX | | |
| Pierce Junction Crude Oil Storage facility | Fairway Energy Partners, LLC | TX | | |
| Pierz Compressor Station Unit No. 3 | Northern Natural Gas Company | MN | 2021 | |
| Pilar Project | | NM | | |
| Pine Prairie Chalk Line Loop | Pine Prairie Storage Co | LA | In service 2011 | |
| Pine Prairie Energy Center CP16-468 | Pine Prairie Energy Center, LLC | LA | | |
| Pine Prairie Energy Center Phase IV Expansion Project | Pine Prairie Energy Center, LLC | | Started 2026 | |
| Pine Prairie Pipeline Replacement Project | Texas Gas Transmission, LLC | LA | | |
| Pine Prairie Storage Laterals | Pine Prairie Storage Co | LA | In service 2007 | |
| Pinedale Expansion - Phase 1 | TEPPCO | WY | | |
| Pineville Compressor Station Replacement | | | | |
| Pinyon Pipeline & NV Meter Station | Pinyon Pipeline Company LLC | NV | | |
| Pioneer Exploration coastal use permit P20081439 pipeline | Pioneer Exploration, LLC | LA | | |
| Pipeline Compressor Addition Project | Trunkline LNG Co | LA | | |
| Pipeline Compressor Addition Project | Dominion Cove Point LNG, LP | MD | In service 2009 | |