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Brendan10, That will be a perfect spot for slag to get trapped if your welders are not welding hot enough. Give the edge a quick grind to remove the bevel and bring it to a square edge and turn the amps up a bit and see what the RT is like on that. We have had welds in the past that have been...

metengr, I agree with your recommendations but who decides whether it is permitted or not ? I am unaware of anything in B31.3 that governs what processes can be welded where. There are numerous postings on the AWS website regarding the use of cellulose electrodes on steam piping and it seems to...

michigander, Not sure what code you are working to but if it is ASME VIII this might help. UW-52 SPOT EXAMINATION OF WELDED JOINTS Spot radiography in accordance with these rules will not ensure a fabrication product of predetermined quality level throughout. It must be realized that an...

Gentlemen, Can I first start by stating I totally agree with everyones comments about it being poor / unacceptable engineering practice. i have spent my whole career asking questions in order to broaden my knowledge and even at 47 years old I will continue to do so. To Lethargic, 1 Why was there...

I agree with metengr regarding the thickness and the size of the weld. I am definitely not an engineer but should you not have some form of compensating plate for the padeyes to weld on to.? Regards, BB

MetGecko, I cannot see it specifically addressed anywhere (maybe in an interpretation) IMHO, No he is not qualified. The branch to pipe weld is a totally different weld to the straight butt weld and the welder must prove his ability to weld it sucessfully. Regards, BB

IFRs, Thanks for your response. The last project I was on was a US$6 billion Nickel Refinery. We did 10% RT on an above ground open ended waterline and 5% Rt on 99.9% Sulphuric Acid piping.??? We had ASME VIII production plates required for B31.3 pipework ? We had B31.1 piping connecting...

BigInch, I am not looking for credibility, purely a response to this question. "If it is not noted in the project specifications or the code what basis can you use for rejecting it ?" Your opinion is not an acceptable response. I know perfectly well that there are metallurgical changes that...

BigInch, Please read my original post again. "If it is not noted in the project specifications or the code what basis can you use for rejecting it ?" I agree totally that the engineer can put any additional requirements in the specifications but if it is not put in the specifications prior to...

"You need to reject it and let the project managers fight about the final disposition." BigInch, If it is not noted in the project specifications or the code what basis can you use for rejecting it ? The fact that you don't think it is a good idea will not wash. This question has been around...

Gecko, The original qualification was a Multiple Qualification using SMAW. A new test is required for GMAW. It can be a Single or Multiple Qualification based on your requirements. Regards, BB

Qualityasia, To go back to the original question, if 99.9% was listed in the original PQR then 99.9% is all that is required in a revised WPS. If your owner requires 99.997% to be listed then you are limiting yourself when IMHO there is no reason to do this. Regards, BB

Qualityasia, If your specifications state a required gas purity or that the purity of the gas must comply with SFA5.32 then you are governed by those requirements. Otherwise, follow the industry norms - 99.995% and greater for carbon and stainless steel and 99.999% for Titanium and Zirconium...

DVWE, Had another look and AWS have a paper on "Recommended Shielding Gases for GTAW." This states "Welding grade Argon and Nitrogen sre supplied with a purity of 99.995% or greater." Is SFA 5.32 a mandatory document ? Cheers, BB

Hi DVWE, No I am not saying it is UHP. I don't have a copy of 5.32 so I am flying a bit blind but when I googled the various gas suppliers it was either 99.995 or 99.996% for commercial grade argon and 99.999% for ultra high purity. Does 5.32 list a minimum for UHP ? Cheers, BB

Bruv, A little bit confused with your statement as you seem to be discussing both WPS's and WPQ's. Will answer based on welder qualification. 1 20 mm plate with 20 mm weld metal is all that is required for unlimited thickness for welder quals. 40 mm thick coupon is for WPS. 2 QW403.6 is...

Qualityasia, As DVWE has pointed out QW-408.2(d) is refering to gas composition, and not gas purity. If you are welding titanium or other exotics that require ultra pure argon then yes, putting 99.997% minimum on your WPS would be correct. However,you state you are only welding carbon and...

Qualityasia, What materials are you welding ? Generally 99.9% Argon written on the WPS is acceptable (Usual welding grade argon is 99.995 or 99.996%) The only time I have heard of a specific percentage being noted on the WPS (99.999%) is Ultra high purity argon which is required for welding...

JStephen, Your amps, vots and travel speed will be recorded on the PQR.(Amps / Volts should be recorded with an ammeter/voltmeter, not reading what is showing on the machine) The travel speed is usually recorded with a tape measure, usually 15 seconds and then multiplied by 4 to give you a speed...

SJones, Not sure where you are getting your information but ASME IX QW 409.1 states "Heat Input = Volts x Amps x 60 divided by Travel Speed." AWS D1.1 Table 4.6 states exactly the same thing. Cheers, BB