Dears,
I wish to know following matters on the usage of Longitudinal Baffles in F-Type Shells.
1. Does HTRI give seal leakage analysis report for Longitudinal Baffles in F-Shells in case of single phase as well as two phase flow on Shell side.
2. May I know the recommended guide lines on the...
Dears,
Request clarifications
For ASME SEC VIII Div 1, is it permissible to form CS & LAS Cones from Plate by Petal Construction.
1. Normally I understand that the Cones are rolled in segments (without thinning) and joined together with staggered L-Seams.
2. The term Petal constriction will...
Thank you JStephen.
Dear r6155.
1. My question is that whether Cold rolling of Shell Plate in the longitudinal direction(parallel to grain orientation) has a relation to Code provision of Extreme Fibre elongation requirements (which is more pronounced in the longitudinal direction.
2. For Cold...
Dears.
ASME Sec VIII Div 1 provides rues for Extreme Fibre Elongation for formed Shells.
1. When Plates for Shells are cold formed by rolling along the longitudinal direction of plate rolling (ie. along the grain orientation), this phenomenon is quite understandable. But if the Plate is rolled...
Thank you r6155 for your remarks.
Kindly advise:
2) TEMA at RGP-G 7.1.2 for Vertical vessels, indicates consideration of Applied Moments at the supports due to external loads. Is this RGP mandatory in all cases?
4) ASME Sec VIII Div 1, UG-22 includes super imposed piping loadings but do not...
Dears.
1. In the Design of Horizontal / Vertical Vessels and Heat Exchangers is it required to consider Nozzles loads for the design of supports / Brackets. This will tend to increase Vessel Thickness / Anchor Bolt Diameter / Foundation loads etc.
2. For Heat Exchangers, TEMA-10 Has certain...
Thank you George for your good remarks.
1. Yes. While Temp Cross can be handled in STHE with Counter Current Sigle pass, Pinch (with given temp Profile) could be problem even you use multiple shells in series. How to resolve the usage of proper type of Shell?
2. Is the above referred profile...
In a particular Cooling application of DM Water & Sea Water, the temperature profiles with pinch are:
Cold Fluid (Sea Water) in / out = 40 C / 50 C
Hot Fluid (DM Water) in / out = 50 C / 40 C
1. Does a Shell & Tube Heat Exchanger of TEMA type E/ H shells suitable
2. Does a Plate Heat Exchanger...
Thank you SnTman.
Hence it is the Change in Tube ID (increase)by Contact or Hard Expansion is the consideration rather than holding power with hard expansion. As such I feel that App A definition of Tube Expansion shall be in line with UHX definition. Hope you agree with me.
However, such...
Thank you SnTMan and EdStainless.
Finally the question remains as :
In the Design of Tube Sheet to ASME Sec VIII Div1, UHX, given a Tube to Tube sheet joint with Strength welding + Contact Expansion (the contact Expansion meant for just closing the gap between Tube Hole and Tube OD without...
Thank you EdStainless.
The question is not about the methods of fixing Tubes in Tube sheet Holes, rather it is about the consideration of Length of Expansion in the Code Design of Tube sheet as detailed in my question.
Dears.
1. For Tube sheet Design to ASME Sec VIII Div 1 UHX, Length of Tube Expansion in Tube Sheet Holes (ltx) is an input parameter. This influences the Thickness requirement of Tube Sheet. As I understand, we have basically two types of Tube To Tube sheet joints:
a) Expanded Joints (with or...
Thank you NRP 99.
1. Request give relevant Code Case reference number. I am not able to find same.
2. As SnTMan kindly advised to use different Allowable stresses for Central thickness and Peripheral Edge thickness, We have to make such calculations manually.
3. Softwares like PV Elite has no...
Dears,
Need following clarifications
1. For Tube sheets of Stainless Steel materials, ASME SEC II D gives two sets of allowable stresses (Higher & Lower). As per Note G5 Table 1A, higher allowable stress to be used for gasketed joints where a distortion can cause leakage.
2. I the design of...
Thank you IdanPV (Mechanical)
According to the provisions of the code rules, do you mean to say that the Bolted Flat Channel cover Thickness of a Shell & Tube Heat Exchanger Designed to ASME Sec VII Div 1 shall be greater of following:
a) Thickness as per UG-34 alone.
b) Thickness as per UG-34...
Thank you SnTMAN
I try to elaborate the subject as below:
1. Bolted Flat circular covers are designed per UG-34(c)(2)eq(2). This does not consider reinforcement of opening in it.
2. UG-39 (d)(2) rules for reinforcement of opening in Flat Head, gives an alternate approach to double the value...
Dears,
Kindly advise me on following:
1.Design problem: Heat Exchanger Designed to ASME Sec VIII Div 1 + TEMA-R, having Flat Bolted Channel Cover with an opening in it
2.Applicable rules are found to be UG 34 together with UG 39.
3. It is observed that thickness required per UG-34 fails when...
Some Curious Guy (Mechanical). Thank you once again.
Yes I fully agree on PV Elite reputation and reliability, which is most widely used and accepted by Pressure Vessel Engineers world wide. Accordingly there could be valid reasons for such considerations in this instance, may be in line with...
Some Curious Guy (Mechanical)
Agree with your views fully.
1. Is it technically acceptable that usage of Pe (as explained) in H calculations only and not in Hp and HD calculations?
2. Can an Authorised Inspector accept such calculations?
3. Of course Standard Nozzle Flange Design to APP-2 may...
