| Badger Energy coastal use permit P20130399 pipeline | Badger Energy LLC | LA | | |
| Badger Pipeline | | CO | | |
| Bahia NGL Pipeline | Enterprise Products Partners | TX | In service 2025 | |
| Bailey East Mine Panel 11J Project | Texas Eastern Transmission, LP | WV | In service 2022 | |
| Bailey East Mine Panel 2L Project | Texas Eastern Transmission, LP | | | |
| Bainville Class Change | TransCanada | MT | | |
| Baker Storage Enhancement Project | Williston Basin Interstate Pipeline Company | MT | In service 2011 | |
| Bakersfield Compressor Station Project | Northern Natural Gas Company | TX | Started 2017 | |
| Bakken Area Storage Hub - Williams Cnty | Tesoro - High Plains Pipeline Company | ND | | |
| Bakken Area Storage Hub - Williams County | Tesoro - High Plains Pipeline Company | ND | | |
| Bakken East Pipeline Project | WBI Energy Transmission, Inc. | ND | | |
| Bakken Hunter Gas Gathering Pipeline | Bakken Hunter, LLC | ND | In service 2014 | |
| Bakken Line 27 Expansion | MDU Resources Group | ND | In service 2018 | |
| Bakken NGL Pipeline | ONEOK Partners | ND, MT, WY | In service 2013 | |
| Bakken xPress Project | Wyoming Interstate Company, L.L.C. | ND, WY | | |
| Ballard Exploration coastal use permit P20070963 pipeline | Ballard Exploration Company,inc. | LA | | |
| Ballard Exploration coastal use permit P20081229 pipeline | Ballard Exploration Company,inc. | LA | | |
| Barilla Draw Crude Oil Pipeline Lateral | | TX | | |
| Barker Cypress Class Change Replacement Project | Tennessee Gas Pipeline Company, L.L.C. | TX | | |
| Barnhart LP Pipeline | Antero Midstream LLC | WV | | |
| Basin Exploration IN coastal use permit P19990384 pipeline | Basin Exploration IN | LA | | |
| Baton Rouge Expansion | Mid Louisiana Gas Co | LA | In service 1998 | |
| Bay Gas Storage Extension | EnergySouth Gas Co | AL | In service 2001 | |
| Bay Gas Storage Looping | | AL | In service 2001 | |
| Bayonne Delivery Lateral Project | Transcontinental Gas Pipe Line Company, LLC | NJ | In service 2012 | |
| Bayou Bridge Pipeline (Phase 1, Nederland to Lake Charles) | Sunoco Logistics | TX, LA | 2015–2016 | |
| Bayou Bridge Pipeline (Phase 2, Lake Charles to St. James) | Energy Transfer | LA | 2018–2019 | |
| Bayou Cane Apartments coastal use permit P20140702 pipeline | Bayou Cane Apartments LP | LA | | |
| Bayou Casotte Energy CP05-420 | Bayou Casotte Energy, LLC | | | |
| Bayway Lateral Project | Texas Eastern Transmission, LP | NJ | 2017–2018 | |