| Phillips Compressor Station | Compressor station | Logan County, OK | Otter Creek Midstream | |
| Phillips66 Los Angeles Lubricants Plant terminal | Terminal | CA | Phillips66 | |
| Physical Services Plant | Gas processing plant | Tulsa County, OK | Univ Of Tulsa | |
| Picante CGF | Compressor station | NM | Delaware Basin Midstream LLC | |
| Pickton | Underground storage | Hopkins County, TX | Enbridge G&p | |
| Pierce Compressor Station | Compressor station | Mcintosh County, OK | Enerfin Gathering-East LLC | |
| Pierce Junction Salt Dome | Underground storage | Harris County, TX | Underground Storage, LLC | In service |
| Pike Baltimore Terminals Baltimore | Terminal | MD | Pike Baltimore Terminals LLC | |
| Pillans | Gas processing plant | Freestone County, TX | | |
| Pine Needle LNG Stokesdale LNG | LNG peak-shaving or storage | NC | Pine Needle LNG Company, LLC | In service |
| Pine Prairie | Underground storage | Evangeline Parish, LA | Pine Prairie Energy Center, LLC | In service |
| Pine Prairie Salt Dome LPG Storage | Underground storage | LA | | |
| Pine Prairie Salt Dome Natural Gas Storage | Underground storage | LA | | |
| Pineview Gas Plant | Gas processing plant | Summit County, UT | Citation Oil & Gas Corp | In service |
| Pink Compressor Station | Compressor station | Pottawatomie County, OK | Enable Oklahoma Intrastate Transmission, LLC | |
| Pioneer Cryogenic Plant | Gas processing plant | Lincoln County, WY | Enterprise Gas Processing, LLC | In service |
| Pioneer Dew Point Depression Plant | Gas processing plant | WY | Enterprise Gas Processing, LLC | |
| Pioneer Terminal | Terminal | ND | | |
| Piqua | Underground storage | Woodson County, KS | Southern Star Central Gas Pipeline, Inc. | In service |
| Pittsburg Compressor Station | Compressor station | Pittsburg County, OK | ET Gathering & Processing, LLC | |
| Plains LPG Services Bumstead terminal | Terminal | AZ | Plains LPG Services | |
| Plains LPG Services Rancho San Pedro Terminal | Terminal | CA | Plains LPG Services | |
| Plains LPG Services ST Clair terminal | Terminal | MI | Plains LPG Services | |
| Plains LPG Services Tampa terminal | Terminal | FL | Plains LPG Services | |
| Plains LPG Services Tulsa Terminal | Terminal | OK | Plains LPG Services | |
| Plains Marketing LP Yorktown terminal | Terminal | VA | Plains Marketing LP - Yorktown TRML | |
| Plant 1 | Gas processing plant | Canadian County, OK | Duit Construction Company Inc | |
| Plant 1 Cold Lay Plant | Gas processing plant | Comanche County, OK | HG Jenkins Construction Inc | |
| Plant 1 Guthrie | Gas processing plant | Logan County, OK | Logan County Asphalt | |
| Plant 112 | Gas processing plant | Stephens County, TX | | |
| Plant 2 | Gas processing plant | Comanche County, OK | T And G Construction Inc | |
| Plant 2 Cmi PTD 400 | Gas processing plant | Cimarron County, OK | J And R Constructors Group LLC | |
| Plant 2 Hot Mix Plant | Gas processing plant | Comanche County, OK | HG Jenkins Construction Inc | |
| Plant 27 3 Cameron | Gas processing plant | Le Flore County, OK | Job Construction Co Inc | |
| Plant 2709 Ada | Gas processing plant | Pontotoc County, OK | Cummins Construction Co Inc | |
| Plant 2713 Coleman | Gas processing plant | Atoka County, OK | Cummins Construction Co Inc | |
| Plant 2721 Enid | Gas processing plant | Garfield County, OK | Cummins Construction Co Inc | |
| Plant 2728 Hugo Sawyer | Gas processing plant | Choctaw County, OK | Cummins Construction Co Inc | |
| Plant 2752 Woodward | Gas processing plant | Woodward County, OK | Cummins Construction Co Inc | |
| Plant 2756 Cmi PTD 400 | Gas processing plant | Dewey County, OK | Cummins Construction Co Inc | |
| Plant 2791 | Gas processing plant | Murray County, OK | Paving Materials Of Southern Oklahoma LLC | |
| Plant 424 | Gas processing plant | Texas County, OK | Apac KS Inc Shears Div | |
| Plant 5 | Gas processing plant | Woods County, OK | Venture Corp | |
| Plant 606 | Gas processing plant | Kay County, OK | Evans And Assoc Construction Co Inc | |
| Plaquemine Plant | Gas processing plant | Iberville Parish, LA | Enlink LIG Liquids, LLC | In service |
| Plaquemines LNG | LNG export terminal | LA | | Under construction |
| Plastic Film Plant | Gas processing plant | Pittsburg County, OK | Pliant Corp | |
| Plateau Creek Plant | Gas processing plant | Mesa County, CO | Caerus Piceance LLC | In service |
| Plato Compressor Station | Compressor station | Stephens County, OK | Targa Pipeline Midcontinent LLC | |
| Platte Valley Gas Plant | Gas processing plant | Weld County, CO | Western Gas Partners, LP | In service |