Tham khảo tài liệu 'handbook of shaft alignment part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 20 Shaft Alignment Handbook Third Edition alignment procedures final cold alignment procedures and hot alignment procedures. The general contractor was told to subcontract the alignment work to companies who specialize in machinery alignment. When the alignment specifications were sent to the alignment subcontractors several of the contractors did not understand many of the detailed specifications for the required work but submitted bids anyway believing that no one would check their work. The contract awards were dispensed and toward the completion of the project the company discovered that the alignment work was not performed to the written specifications and withheld payment to the contractors who performed the work or lack thereof . A company which was in the process of becoming ISO compliant requested information on who administers certification testing for their maintenance personnel for shaft alignment. Several of their people had been certified in vibration analysis and thermography and they wanted to show documentation that their personnel were adept at not only finding problems but also adept at fixing them. A petroleum company decided to sell one of their facilities and several of the prospective buyers were interested in retaining as many employees as possible. However they only wanted to hire the people who were adequately trained and were certified to do certain tasks. When asked to provide information on task certification of their employees the petroleum company was unable to provide the information. A steel company was having some problems with a fairly complex multiple element drive train where misalignment was found to be the root cause of the failures. No one in the plant knew how to align the drive system. An alignment service company was contacted and the technician said that they could align the drive system in less than 4 h. When the work was actually done the job took several days to complete. An electric utility company had experienced .
