According to the alert, agents from the U.S. DOT Inspector ... about 5,900 high-pressure compressed gas cylinders with test dates and Requalifier Identification Number H557 in 2011 and 2012 ...

on DOT high-pressure gas cylinders. Only high-pressure cylinders serviced by ASFES bearing these markings are affected," the notice states. Anyone possessing one of these cylinders filled with gas ...

Even though compliant cylinders should bear the DOT specification marking, the serial number, a symbol registered with the associate administrator, and the inspector's official mark, along with the ...

In a rule issued May 8 titled “Hazardous Materials: Requirements for Maintenance, Re-qualification, Repair and Use of DOT Specification Cylinders,” the DOT amended the requirements for hazardous ...