We use metal core extensively for several years without any more problems than other wires. Some metal core wires reqire flux core welders tickets if you are certified to CWB/AWS but require GMAW tickets if you are welding to ASME. What code are you working to and which metal core?
We still have a lot of engineers who will not accept 309 filler metal when the vessel is stress relived because of this note in the code. Even though it is not relevant in the past 20 yrs they still insist that we use ERNiCr-3 for dissimilar aloys when subject to PWHT. Engineers still work in...
weldtek
Our procedures must be aproved by TSSA and as far as I know they have always taken the stace that because the consumable can exceed the limits imposed by SFA 5.18 the wire is not aproved. Do you specify in your procedure that the MTR for filler metal is inspected and aproved before use?
E70 S6 does not meet the chemical analysis of A1. E70 S2 or S3 do meet this requirment so there is considerable difference and sice a change in the A number is an essential variable you always need separate procedures for these two wires.
I realize you posted this in the AWS forum but we weld lots of ASME pressure vessels with GMAW that are 100% RT inspected. there is no reason why GMAW welds should fail an RT inspection.
NB registration is never needed in Canada - CRNs are always required and they are a lot more difficult and expnsive. As fegenbush points out you can NB register if you want.
I do not have the years of experience that metengr has but when we started doing ASME procedures 5 yrs ago I researched several computer programs that claimed to write ASME welding procedures for you and none of them worked. By the time you adjust everything that you want to do so that the...
Thanks to all for the input. The pressure vessel is designed for full vacuum so that could be done but I do not believe it is necessary. They want the interior to be fully blasted and the nitrogen is only to prevent internal rusting during storage. They are suggesting that we insert nitrogen...
We have a large vessel that the engineer wants cleaned and shipped with 5 PSI nitrogen. Does anyone know of a procedure to purge and fill the vessel so that we can guarantee it contains nothing but pure nitrogen.
If our cost was $1000 we would mark it up but at the same time we often build 2 or 3 vessels so that we can divide the cost. Our AI typically makes one visit for MTR's and drawings (initial) one visit for RT and Hydro and the last for paperwork. Often another visit for fit up if required on...
The identical vessel with a "U" stamp will cost a small amount more but not two or three thousand more. Our AI generally makes 3 visits for the average vessel @ $150 each and a small amount of paperwork to register it with NB or CRN but in total it would be only $1000. But back to the original...
The weld symbol is a basic fillet weld so does not specify a filler metal but how else will you achieve the fillet size required. You cannot just melt the parent metal so you must add something.
We have a shop Holiday procedure for polyethylene coating that reads:
Dry film Mils Voltage
8 to 11 1,700
12 to 15 2,200
16 to 20 2,700
21 to 40 3,200
41 to 55 4,200
You first need to find out what the min required thickness is and set your Holiday tester accordingly. Note that...
