Dear All,
I am performing a design using ASME VIII Div.1 Code and
I am keen to understand if the bolting material ASTM A 453 660 Gr. A & B comply with the NACE 0103 and 0175 requirements ( above all regarding the hardness limit).
I have to design internal bolting in contact with H2S...
Dear All,
I have to choose the heat exchanger bolting material suitable for Sour Service.
The boltings are INTERNAL and so directly in contact with the process fluid ( completely in sour enviroment ).
The material of this exchanger is carbon steel and we are in HIGH PRESSURE SERVICE and LOW...
Dear all,
I would be grateful if someone lets me know which is the suggestable temperature limit for the apllication of DUPLEX material ( 22% Cr - UNS N031803 - SAF 2205 )-
I learnt that, for ASME Code Div. 1 - Part II , the temperature limit is 315°C ( 600°F) ; over this temperature NO...
Dear all,
I am performing a design of an high pressure shell & tube heat exchanger.
I have an external flanged joint ( shell flange bolted to tubesheet) and the tubesheet welded to the channel barrel (TEMA TYPE "C").
I have to evaluate two joints:
Case 1)
both the Shell Girth Flange and...
Dear all,
has someone already experienced exchanger tubes damage due to stress corrosion cracking mechanism which originates and propagates from the inner surfaces of tubes??
It seems that this phenomenon is due to the concomitant presence of 2 factors:
1) RESIDUAL EXPANDING STRESSES ON THE...
Dear all,
I have to design a gasketed joint of a shell & tube heat exchanger using a Dynagraph Gasket.
Could someone let me know this gasket values ( m & y ) to consider in calculating my flanges ?
Thanks and regards
GENGI
Dear All,
I have to design NTIW (No Tube In Window) tubesheet of a vertical combined feed exchanger ( 1 pass tubeside with bellows at outlet ).
NTIW tubesheet is not in the scope of ASME VIII div. 1 UHX as well as TEMA standard since not perforated for all the overall circular area, but, with...
Dear all,
could someone let me know about a requirement of Dual Certified Stainless Steel 304/304H with 0.04% minimum carbon content?
Which allowable stress is correct to use in this case?
Is that of 304 or 304H?
Do you have some information about the reasons of such requirement?
many thanks...
Dear all,
I wonder if someone could help me on this topic.
I would like to know if, for the welded exchanger tubes (stainless steel) there are any requirement regarding the weld bead (internal & external) such as limit height.
There are Project Specifications which requires the welded tubes...
