Agree with kingnero. However, if you’re looking for a clause in the code that allows this, there isn’t one.
Just machine down your pipe to the desired thickness and record it on the PQR.
The devil is in the details; she also wears prada.
Agree with Ed.
The concern when welding chromium alloyed materials is hexavalent chromium exposure, but this is typically only a problem present with welding processes that use a flux (i.e. FCAW and SMAW). Generally not a problem with GTAW, and certainly not anything an N95 mask will help to...
If you just pay a welder’s helper to wire wheel the welds, I think you will be pleasantly surprised with the results, as well as the scale of economy to do so.
The devil is in the details; she also wears prada.
Perhaps you should ask them for a picture of what it is that “prettier” means or looks like to them. As professionals, we ensure the welds meet the code of construction.
The devil is in the details; she also wears prada.
You know what they say about assuming…but……
A part ordered from McMaster Carr is probably not going to be used for a critical application, but I digress. It definitely wouldn’t hurt to try.
For what it’s worth, my facility does about 1,000 spots welds a day on 4 machines and all different...
I agree on critical applications, but in those cases you will want to remove the oxide layer with a flapper disc or wheel. Scotch brite by hand after a few second scrub will only break down the oxide layer slightly. Spot welding is such a quick, intense heat from resistance that the oxide layer...
It is not. Settings may vary slightly between different work hardened levels, but not greatly.
Not by much. Because of its austenitic structure, it is not hardenable by heat.
Really more of a question for your customer. It will depend on its end usage. Perhaps they will need similar hardness...
I don’t know that I would say deadly poisonous, but it certainly isn’t good to breath. Most people who experience excessive zinc inhalation from welding describe it as a flu-like symptom, which is usually abated by a glass of milk or two.
It may become deadly after long term, high exposure...
When the header is the same diameter as a nozzle, the best solution is a Tee. Is this route a possibility?
The devil is in the details; she also wears prada.
Yes, it would. Typically, there are three required tests to qualify a CRO WPS. Chemistry, liquid penetrant, and bend tests. Customers may require hardness testing or others. Tensile testing, including yield strength, is not required.
No, it will not. See QW-250 for the specific welding process...
You’ll have to look in ASME section II, part A for that specific material and see if there is an associated P-number with it.
Cb is the old designation for Columbium, now known as Niobium (Nb).
The devil is in the details; she also wears prada.
I’m curious if you are reviewing an overlay only WPS, or the joining (groove weld) of CRO parts?
For joining, yield strength has never been a requirement for Section IX qualifications. Only Tensile. See QW-150 and 153.
Also, tensile tests, bend tests, toughness tests, etc. are not considered...
Good post, DekDee. But that horse named r6155 is already at the water trough, if you catch my drift……[wink]
The devil is in the details; she also wears prada.
I could be mistaken, but I think the code does talk about when to stop digging a hole; it’s in one of the mandatory appendices 🤣
The devil is in the details; she also wears prada.
