Whenever there is bidding for new project, I always see customers restrict the using of pressure part (especially stainless steel) origin from China to build pressure vessels.
This restriction is still remaining like 10+ years as far as I've been in this field.
I am wondering that these days...
a never ending debate.
Follow TEMA tube to tubesheet joint design and you can get rid of the confusion of "light" "heavy" expand thing.
TEMA only requires seal weld + expand with groove OR strength weld + NO expand.
The rest is depended on your manufacturers' experiences and technique.
I go...
Lately, the customer asked to my boss if thickness check annually is required or not?
For pressure vessels that are construced by following ASME Sec8 Div1 in general.
I never heard of this requirement in the book before. Mostly, it comes from an additional requirement of each customer...
My client has inquiry about a dome roof, flat bottom tank with internal pressure of 340kpa.
The size is gigantic Dia=8m H=5m. (Their existing tank only ATM)
I don't think it's practical from my experiences. If I go for Sec VIII Div.1, the thickness will be skyrocket.
Is there any book that...
Looks like, originally, the leakage comes from nozzle-to-shell joint and they go to weep hole.
And if you replace new LWN nozzle same size, can you be able to pressurize the tower to confirm no leakage on that joint?
If yes, then go ahead.
Dear SnTMan,
Do you think there is anything to do about type of fluid in jacket such as hot oil, steam, cold water that affects on where we have to consider to weld spiral baffle to?
Dear r6155,
What if jacket design pressure is FV too?
Moreover, can we calculate the strength of spiral baffle (acts as reinforcement ring) the same way we do on typical reinforcement ring?
Yes sir,
I checked drawings and saw different design on several jacketed vessels.
So I just want to understand in which case we have to weld it to shell or in which case we have to weld it to jacket.
What I can think of is that most of jacketed vessels I've seen are made of CS jacket + SS...
What condition to decide where to weld spiral baffle (the thin plate to force direction of flow inside the gap between main shell and jacket) to outside of main shell side or to inside of jacket shell side?
I cannot find any book to support this. I saw some existing vessels in the same plant...
The reason is
1. The gasket at shell flange is broken and there is some vapor leakage when the media inside was heated.
2. It takes a long time to disconnect all piping and agitator on top of the vessel in order to replace a new gasket.
So my client would like to seal the gap between shell...
thanks SnTMan & quadtracker
Now proceeding plug welding.
Agitator maker doesnt accept to add adaptor. this agitator is kinda special and already fabricated to conform with vessel dimension.
This pad flange should be fabricated as per JIS10K 450A dimension. It is used for connecting with agitator motor.
But I just found that bolt holes quantity is not correct (16 holes instead of 20 holes) :(
Now the only repair procedure to come up with is by plug welding all hole follow AWS D1.1...
I'm not allowed to publicity post full detail drawing.
I'm now seeking for the experts also.
But I'll try to explain what I've done so far...
1. A vessel as mentioned in topic was already made but with different sight glass design and NO reinforcing pad for sight glass opening. (There is a...
Racookpe1978,
Refer to this catalog;
http://www.papenmeier.de/tl_files/lumiglas/pdf/en/datenblatt/3755.438.00.ovale.eng.pdf
I use 10bar model but increase dimension 'h1' to 50mm
