Thank you so much Trestala!
This is the flange with split ring, ring joint and tubesheet. In this case the RT can be done on the flange welding, but in the rear closure, as shown before, we would have a corner joint so no RT can be done.
Thank you, David. I noticed Note 8 in Table UW-12, but...
Thank you, R6155. This is the sketch. The weld I am referring to is the one connecting the shell nozzle to the flat cover on the right side
Thank you, Trestala! I now understand that I have a Category C joint, which is not required to be radiographed because there is no intersection with a...
Dear all,
I am currently designing a hairpin heat exchanger under ASME VIII-1 Ed. 2023 with the following design conditions:
Corrosion Allowance: 1.6 mm
Shell Side Pressure: 10 barg, Temperature: 280°C
Tube Side Pressure: 93 barg, Temperature: 280°C
Joint Efficiency Required by Client: FULL...
Hello everyone,
I would like to ask you for confirmation on a particular comment reported to us for UCS-66 - impact test requirements, specifically regarding the ASME SA-516 gr.70 fine-grained material produced and normalized.
Considering the ASME II Ed.2023, there is the note:
"The steel...
Thank you GD for your answer,
I just shown an imagine where spit ring (back ring) had a generic indication. Our floating flange will not be absolutely that.
Thank you so much!
From Fig.UG-84.1
(c) Material produced and impact tested in accordance with SA-320, SA-333, SA-334, SA-350, SA-352...
Thank you all for your responses,
I apologize, it was definitely a typo and I meant SA-182 Gr.5, both in the title and in the first post.
I asked because we usually order main flanges with specific dimensions in ASME SA-336 (and tube sheets) where, specifically, tube sheets receive machining...
Thanks for the answer GD,
I'm sorry I forgot to mention the design code: ASME VIII Div.1 Edition 2023
I am designing an heat exchanger but my question is much more generic, I mean, these materials apply both to heat exchangers but also to vessels, considering standard flanges or flanges with...
Hello All,
I'd want to show a doubt that comes for standard forgings and large forgings, in particular regarding carbon steel at hight temperature and low temperature.
Considering the ASME SA-350, that specification covers carbon and low alloy steel forgings, requiring notch and toughness...
Regarding the Impact test, I have a doubt about the governing thickness reported in Fig. UCS-66.3.
Considering the following images, our software considers the following governing thickness of the floating flanges:
- Slit ring divided for 4,
- Floating flange: dimension B divided for 4
-...
Thank you so much all! The inspector wanted exactly to increase the tube side pressure to 7.9 (design pressure + FV shell side), I've revised the design and effectively, as all of you suggested, that is a combination case that I should have considered before.
Thank you so much another time.
Thanks GD2 for your answer,
"I don't understand when you say I ahve forgings with MDMT -32C."
I'm sorry I haven't explained myself appropriately, I made an exemplation, so in my case using fig.UG-66 (tube side) I obtain, for that thickness and for forgings in ASME SA-336 Gr.11, a MDMT of -32 [°C].
Hello all
I'd like to ask you one particular point that the NoBo pointed out in a design of an hairpin heat exchanger, defined by the following data:
Calculation Code: ASME VIII Div.1 Edition 2023
Design Pressure SS/TS [barg]: 6.7 + FV / 6.9
Design Temperature [°C]: 111 / 111
Materials: Carbon...
Thank you geesaman for your answer,
Definitely they are very similar but not identical, but considering che chemical composition and the heat Treatment in the production process (SA-366 shall be annealed or normalized and tempered and SA-182 annealed or normalized and tempered) is that...
Hello All,
Considering the forging ASME SA-187 Gr.5 and ASME SA-336 Gr.5, I have noticed that, in ASME II Part D they are caracterized by different values on Maximum Allowable stresses, altrough I haven't found any reference about the reason why difference is shown, especially considering the...
Thank you so much! Absolutely these info have been really useful. I hadn't considered the brittle fracture characteristics of Gr.21/22 and Gr.11.
So, considering the MDMT, if I have forgings with MDMT at -32 [°C], Tubesheet at -29 [°C] and for example tubes at -49 [°C] but plates at +9 [°C] I...
Dear all,
We are designing an Heat Exchanger type AES (split ring) with the following specifications:
Design Temperature SS/TS: 370/354 °C
Design Pressure barg SS/TS: 65.2/82.5 barg
Mimimum Design Metal Temperature Requested by Client: -12 °C
Design Code: ASME VIII Div.1 Edition. 2023
Each...
Hello everyone and thanks for your help,
I'd like to know if, regarding to the material ASME SA387 Gr.9, that is not available anymore in ASME II part.D, there is an equal in EN.13445-3 Ed.2021 that we can use as a material for plates. Or, in case, if there would be another material that we can...
