Recent content by starrproe

rsaeed, You may please refer following message from PVElite regarding your query on addition of static head for extrenal design calculations.

jte, It is turning out that I will also need to work on a vessel with 3 saddles in some time. Can you please share as to what approach did you use for anaylsing vessel on 3 saddles.Somebody from my office suggested using STAADPRO.Since I have no experience dealing with such vessels,can you...

rsaeed, My views on your queries: Refer UG-32(a), UG-33(a) & UG-33(a)(1)(a). Probably PV-ELite is misunderstanding "plus heads" as adding liquid static head, which is incorrect.Code intends to denote concave sides of heads as "plus heads" and convex sides as "minus heads". Static head of...

rsaeed, By default, PV-Elite assumes 1.3 times allowable stress at ambient temperarue as the allowable stress during hydrotest. This is the case with youur calculation as well.(Press F1 on your keyboard after selecting "Hydrotest is 90% yield." in Design Constraints header to see it yourself.)...

rsaeed, Your ellipsoidal head dimensions are - ID = 3500mm Min. Thickness = 61.5mm Nominal thickness = 75mm Procedure for calculating fibre elongation is - Centreline diameter = 3500+2*(Min. Thickness/2) = 3500+2*61.5/2 = 3561.5mm Centreline radius...

vesselfab, Can you please share broad outlines of requirements for spliced RF pads? I dont have A09 of Code. Starrproe

jone, Thanks for the text.. speco / srfish,, Thanks for your valuable suggestions. Starrproe

Hi All, I am working on rerating some existing air-coolers for higher duty.Initial calculations suggest that by increasing the air-flow(using new fans), while retaining existing bundle, the required process parametres can be acheived. However, since I also need to check suitability of existing...

My query is for an existing column where I need to introduce a new manway. The location for new manway is in vicinity to an existing 6" nozzle, such that limits of reinforcement of the two openings interact and it represents closely spaced openings per UG-42 of ASME-VIII-1. When I run the...

Hi All, This question may sound a bit stupid to the experts here in this forum, but I just can't resist myself asking you guys as the issue has been bogging me for quite some time. What is the main difference between the corosion mechanisms - Stress Corosion Cracking(SCC), Sulfice stres...

I am adding a new 16" nozzle to an existing process column: 1. Column dimensions - 8840mm ID x 47000mm T/L to T/L 2. Design pressure and temperature - 3.5 Kg/cm^2(g), 367C 3. Shell and Nozzle neck MoC - SA 516-70 4. Provided shell course thickness - 27mm Required shell thickness due to int /...

metengr, Can you please direct me to relevant section of Code (ASME-VIII-1) which says that PWHT will not be required for the attachment welds? Regards, Starrproe

jte, Thanks for your response... I am sorry if my statement has caused you some confusion, but actually I wanted to know whether I can have any size of reducing slip-on flange,especially with openings greater than those allowed per Columns 2,4 & 6 of Table F6 (e.g. NPS 24 x 16). Will such a...

jte, I have come across a case where I need to provide a 16" opening in blind flange of 24" manway.(I can't use a 24x16 concentric reducer due to process constraints.) I am planning to go for a 24x16 reducing type slip-on flange.Of course, the reducing outlet would need a hub as specified in...

We have a 24" manway with standard flanges per ANSI B16.5 in a 8840mm dia. process column.Our Process engineers want to do some modification, for which they need to use this manway as an inlet nozzle by cutting a 16" opening in the blind flange and connecting it with a 16" line. However, this...