Forum Technical Discussions Re: MT, PT in Sub zero Temp Posted by: Jan , E-mail: Address, on July 05, 2008 at 03:57 : In Reply to: MT, PT in Sub zero Temp posted by : RT. Jeyakumar , E-mail: Address, on July 01, 2008 at 08:10 : For MT is important what type of suspension you want to use (oil or water base). In oil case is problem with bad viscosity. The water suspension had to contain e.g. ethylalcohol to avoid freeze. For PT is existing a lot of codes. Each of them defined so-called range of default temperatures (c. 16 - 48 deg.C in ASME, 10 - 50 deg.C in EN and so one). If you want to carry out the PT below the min. required temperature, you will had to qualify your PT procedure on the appropriate comparative gauge (e.g. Al block according to ASME V art. 6 - I hope). At all events, you must use a longer time for penetration and developing. ----------- Start Original Message ----------- : Good day Everyone, : Is there any special chemicals available for doing above NDT in Sub Zero temperature. : And any code & Standard specifically for this kind of regions? : Please help me giving some tips. : Thanks in advance, : RT. Jeyakumar ------------ End Original Message ------------ Follow Ups: Post a Followup: Name: E-Mail: Subject: Comments: ----------- Start Original Message ----------- : For MT is important what type of suspension you want to use (oil or water base). In oil case is problem with bad viscosity. The water suspension had to contain e.g. ethylalcohol to avoid freeze. : For PT is existing a lot of codes. Each of them defined so-called range of default temperatures (c. 16 - 48 deg.C in ASME, 10 - 50 deg.C in EN and so one). If you want to carry out the PT below the min. required temperature, you will had to qualify your PT procedure on the appropriate comparative gauge (e.g. Al block according to ASME V art. 6 - I hope). At all events, you must use a longer time for penetration and developing. : : Good day Everyone, : : Is there any special chemicals available for doing above NDT in Sub Zero temperature. : : And any code & Standard specifically for this kind of regions? : : Please help me giving some tips. : : Thanks in advance, : : RT. Jeyakumar ------------ End Original Message ------------ Optional Link URL: Example: "http://www....html". Alternative write "http://www.ndt.net/wshop/attach/filename.htm" if you transfered a filename.htm via FTP Page Title: is important! Optional Image URL: http://www....gif Attention! Please click the button only once. This may take a moment to process Forum Technical Discussions Help