In 1996, a survey was sent by the API subcommittee on Inspection, Coke Drum Task Force Group, to companies operating coke drums in the United States and abroad. This was the third survey of similar nature conducted by API. Fifty-four surveys were returned representing 17 operating companies and a total of 145 drums. The purpose of the survey was to collect data covering a broad range of issues including: 1) General Information2) Design3) Operating Information4) Inspection Practices5) Deterioration Experience6) Repair Procedures of three of the six areas, Operation Information, Inspection Practices and Deterioration Experience were not covered in previous industry surveys. Additionally, the survey requested more detailed information than previous surveys.