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Pressure vesel

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发表于 2021-9-1 00:07:16 | 显示全部楼层 |阅读模式
hey does anyone know any good practicei could do to get my ASME pressure vessel cert.?I have my d1.1 / d1.5 in stick and fluxcore and dualshield but want to start doing more of the pressure vessel work.any suggestions would be nice.And also to you pipe welders out there any suggestions on test practices =]thanks6G zirconium 702 GTAW 2" xxheavy6G P.E.D. carbon steel GTAW 2" xxheavy3G titanium Gr. 2 - Gr. 7 GTAW up to 3/4" 3G 316L stainless GTAW up to 1" 3G carbon steel GTAW up to 1" 3G Hastalloy GTAW up to 3/4"1G tantalum GTAW up to .060"
Reply:The certs are written by the shop, not ASME, and testing is usually done in house. They are (generally) non-transferable, so you change shops, you retest.As to what to practice, you really need to know what procedures the shop you are looking at use, what positions they do the work in, and what materials they work with.There will be plenty of other opinion of what to work on, but here's my takeA starting point is work on open root groove welds in all positions (flat, horiz, vert, overhead) and on 6G, using TIG and using 7018 over 6010. It probably isn't worth going beyond low carbon unless you know of a particular test with a different material. For the 6G, I'd practice with 2"SCH80 or 1.5" SCH80.Bevel to 37 degrees, and practice with everything from a butted up feather edge to maybe 3/32 land with 3/32 gap. Maybe even 1/8. Practice beveling yourself with a torch and grinder. I have seen a few shops that want to see you do this, so they hand you a hunk of pipe or plate and point to the torch. You torch cut the material, hand prep the bevel, then turn it back into one piece. Most shops will have prepped slugs for a pipe test.  Vary the angle of prep a bit, too, as many procedures have a pretty wide allowable range for the prep angle.
Reply:oh ok i didnt know that =/ but ok then about the aws pipe tests do you know anything about those because i like to replicate the tests and run them at work and check the tollerances of my tests thats how i practiced for my d1.1 and d1.5 sooo what are the pipe tests and hahaha what about the structural aluminum mig haha thanks again6G zirconium 702 GTAW 2" xxheavy6G P.E.D. carbon steel GTAW 2" xxheavy3G titanium Gr. 2 - Gr. 7 GTAW up to 3/4" 3G 316L stainless GTAW up to 1" 3G carbon steel GTAW up to 1" 3G Hastalloy GTAW up to 3/4"1G tantalum GTAW up to .060"
Reply:Unless YOU actually pay for the certs....Understand this..And make sure you do...Quoted..The certs are written by the shop, not ASME, and testing is usually done in house. They are (generally) non-transferable, so you change shops, you retest.Don't I know it......zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:ok becasue at a local school it says i can take a asme pressure vessel test so i was wondering, thanks6G zirconium 702 GTAW 2" xxheavy6G P.E.D. carbon steel GTAW 2" xxheavy3G titanium Gr. 2 - Gr. 7 GTAW up to 3/4" 3G 316L stainless GTAW up to 1" 3G carbon steel GTAW up to 1" 3G Hastalloy GTAW up to 3/4"1G tantalum GTAW up to .060"
Reply:ASME is a one shop ticket...always has been I think. AWS you can carry on yourself but now-a-days most shops still want their own test on you...at their expense.As for practice, the stuff I certed to when I was in that game was stick, mig and tig. You say you're D1.1 certed now so whatever tests they want shouldn't be a problem...as long as you're proficient in the process.Anything worth doing is worth doing RIGHT
Reply:I work in an ASME shop.  Applicants are given 1.5" sch40 test pieces (cut, beveled, and blasted).  Must fit them together, and weld per our applicable WPS.  Position is 6g to test all position, process is short arc mig.  Coupons are cut out at 0*(top), 90*, 180*, and 270*, and bend test.  After hiring, additional tests are given based on need to preform other processes (we use short-arc mig, spray-arc mig, dualshield, tig, and sub-arc), and for thicker metal.  Tests are given at 6g when possible and piratical.  Most tests are open root.  In practice, most the tanks and pressure vessels we build are welded on pipe rolls or rotary positioners, so the majority of welds are made rolled at 1G.  Practice on reasonable wall thickness pipe at 6g.  Practice both hotter and colder than you normally weld at, you'll have to test within a prospective employers WPS, which you probably won't know ahead of time.
Reply:Originally Posted by Static-XJCoupons are cut out at 0*(top), 90*, 180*, and 270*, and bend test.
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