Forum Technical Discussions Re: lamination vs stringer Posted by: Ryan Burns (PID_3330), E-mail: Address, on June 20, 2008 at 06:24 : In Reply to: lamination vs stringer posted by : jason hewett , E-mail: Address, on June 19, 2008 at 23:30 : Hi Jason, My opinion is that it would depend on the depth of the stringers. What is the product and pressure in the line? If you are finding multiple indications at varying depths in the area of the anchor welds, then yes, I'd be concerned. Is there any chance you may be seeing HIC (Hydrogen Induced Cracking)? Have you done shearwave to find any step cracks? I'd also suggest using a delay line transducer to ensure near surface indications are not missed, as well as black on white MT to ensure there is no SCC present. Good luck, Ryan ----------- Start Original Message ----------- : My client has specs for welding close to laminations but none in regards to stringers. I'm currently inspecting 12" x 6.4mm late 1950s pipe that is full of inclusions/stringers. It's not much of an issue when doing a tie in on dead pipe, but welding line stoppers (fillet welds) onto live pipe with stringers present is making me nervous. Should I have cause for concern? : Cheers : Jason ------------ End Original Message ------------ Follow Ups: Re: lamination vs stringer David Hermanutz 21:55 Aug-22-2008 (0) Post a Followup: Name: E-Mail: Subject: Comments: ----------- Start Original Message ----------- : Hi Jason, : My opinion is that it would depend on the depth of the stringers. What is the product and pressure in the line? If you are finding multiple indications at varying depths in the area of the anchor welds, then yes, I'd be concerned. Is there any chance you may be seeing HIC (Hydrogen Induced Cracking)? Have you done shearwave to find any step cracks? I'd also suggest using a delay line transducer to ensure near surface indications are not missed, as well as black on white MT to ensure there is no SCC present. : Good luck, : Ryan : : My client has specs for welding close to laminations but none in regards to stringers. I'm currently inspecting 12" x 6.4mm late 1950s pipe that is full of inclusions/stringers. It's not much of an issue when doing a tie in on dead pipe, but welding line stoppers (fillet welds) onto live pipe with stringers present is making me nervous. Should I have cause for concern? : : Cheers : : Jason ------------ 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