Government

摘要

Six months after giving pipelines the green light to use high-stress pipelines more widely, the Pipeline and Hazardous Materials Safety Administration (PHMSA) is now highlighting safety concerns with new pipelines operating at 80% of specified minimum yield strength (SMYS). The concerns are the results of intensified inspections over the past 18 months. Prior to November pipelines could build lines at 80% if they were granted special permits from PHMSA. After the agency published a final rule in November, any pipeline could operate at 80% in a class 1 location - up from 72% of SMYS - without a special permit.