|
|
My DH is new to pipe welding and has a welding test coming up. He has had no issues passing BEND tests, but this will be an X-ray test.Are x-ray tests harder to pass?
Reply:Just make sure he watches his tie ins and stops, and keeps the slag out of the weld. The x-rays show defects within the weld in a way that a bend test cant do, so slag pockets and porosity must be ground/burned out
Reply:Xray tests essentially give you a view of whats going on inside your weld. Its kind of hit and miss at times, for instance sometimes you can get away with trapping a little bit of slag and she will still bend clean, whereas an xray would pick this up. Generally depending on the test you may be allowed a certain amount of weld discontinutities. Say 5 to 10%, but usually atleast in my particular field its always 100% xray. If he doesnt have issues with bend test i can just about garuntee he has clean welds. is this a tig test? if so watch out for tungsten inclusions, if you dip that tungsten once STOP grind out the area with an inclusion and continue.
Reply:He is a new combo welder, so he is tested on both TIG and stick on carbon steel & stainless pipe. It's really hard getting/keeping a job when you're fresh out of school..
Reply:hell do fine! nothing to be afraid about regarding an xray its just another form of testing.
Reply:If he passes one he should have no issues with the other.
Reply:I wonder how they weld in outer space....you'd be welding upside down all the time virtually, except there was no gravity to keep the puddle in place......you could end up with a slag tunnel if you used stick.......pretty cool for alluminium with no O2 to cause oxidation.Ian.
Reply:Originally Posted by puddytatI wonder how they weld in outer space....you'd be welding upside down all the time virtually, except there was no gravity to keep the puddle in place......you could end up with a slag tunnel if you used stick.......pretty cool for alluminium with no O2 to cause oxidation.Ian.
Reply:RadioGraph Interpretation - Click here to see What is Called in Xrays Now I believe that if you are good enough to complete a weld in a timely manner without trouble and can pass the bend test clean, then you will have absolutely no problem passing xrays.46 sae30047 sa200 w/Wisconsin VF451 shorthood56 shorthood56 shorthood68 redface69 redface07 ranger 305G13 sae300Inconel/Hastelloy SS Duplex Chrome/Carbon Tig F3Downhand STT/RMD F3F4 B Pressure
Reply:i'd rather take an x ray test any day. you can get one little porosity bubble in a strap that might not be called on x ray, but that tiny bubble can ruin your day on a bend test.not to mention all that cutting and grinding, but most places do that for you these days |
|
发表于 2021-8-31 23:39:01