Despite recent revelations that PG&E at times has boosted the pressure in its natural gas lines to the legal limit — including the pipeline that exploded in San Bruno — many experts say they don’t ...

The US Pipeline and Hazardous Materials Safety Administration issued an advisory bulletin to pipeline owners and operators to verify records relating to their pipelines’ maximum operating and ...

On Nov. 17, new rules took effect increasing the maximum allowable operating pressure (MAOP) for natural gas transmission pipelines beyond that allowed by previous regulations. On Nov. 17, new rules ...

Pipeline opponents are raising new concerns about the safety of Energy Transfer/Sunoco Logistics’ Mariner East 2x natural gas liquids line, which the company says will have a maximum operating ...

Federal investigators have determined that the natural gas in the pipeline that exploded in San Bruno was running at a higher pressure than the maximum limit PG&E has told the public it maintained. At ...

The Pipeline and Hazardous Materials Safety Administration proposed a rule today that would increase the maximum allowable operating pressure in some gas transmission pipelines above what its ...