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OK roca... we're ordering the new one today and will you're right we are internally coating the lower water section. Thanks folks for the exchange of repair options and ideas. Getting a salvage vessel or a new one was always an option. The forum question was to identify current repair...

Thanks jte, I just sent a designer to look at a used vessel located near us in New Iberia, Louisiana. We are in Lafayette, LA. Parellel to this repair option, we have also been trying to locate used or new options in order not to loose valuable time. This vessel, used, is for $7,500. A new...

MJCronin, My vessel is made of common carbon steel like SA516-70. This forum effort was to focus on potential repairs. We are exhausting other options like replacement. We have located several potential salvage vessels. The owner should of had a mech. integ. plan in action but they don't in...

Unclesyd, I went to the website you attached. Thanks. Whenever we tackle a unique problem we also consider "New Technology". I'm sure this spray-on method is not new but applying it to our industry in a situation like this would be considered new. I am going to look closer at the vessel...

I know that this was a long shot, but I had to try just in case there was a repair procedure out there that maybe sprayed hot cladding material that would adhere to the carbon steel internal wall. Thanks for your input.

Hi folks, I have a 72"OD x 15's/s @ 125psig horiz. vessel that has internal corrosion at the bottom of the vessel which operates at about 50psig. No vacuum. The bottom 1/3 has the internal corrosion. The corrosion is severe enough to cause leaking. The corrosion type is pitting with pin...

KernOily: I just noticed you thread about floatcells. Did you get all your answers? I have bought and installed many of both types, hydraulic and mechanical.

Hi, I have searched Eng-tips for sample blowcase sizing information. I located the following: thread469-52806. I am familiar with blowcases however I can't seem to find some sample sizing calculations. Does anyone out there have samples that they can share with me? I'm sure I can develop...

metengr, Sorry about the delay. The vessel is a vert. Fractionator tower 20'ID x 103's/s x 28psig. The bottom has a cone and the top has an elliptical head. The cone and 50' of the bottom shell is lined with 0.10"ss and operates at 700oF, designed for 750oF. Most of the vessel is about 1/2"...

Thanks metengr, 1. so am I correct in stating that the 2005 Code requires impact testing, per UG-20(f), for these materials with a design temperature of 750oF? 2. Am I overkilling by requiring the material to be normalized and meet a max. of 200BHN?

Checkout www.pveng.com, if you are looking for an approximate thickness. You can download their spreadsheets for Shell, Heads, Nozzles. If you are looking to a formal set of calculations, you would be wise to heed davefitz's recommendation.

Hey folks, need your opinion again. Part of my 1950 vessel has a 750oF design temp. I am installing SA516-70 & SA105 mat'l in this section. The 1950 ASME Code doesn't req. impact test or hardness limits. The 2004 Code, under UG-20(f) does. I believe it's due to the "creep-rupture range of...

Additionally, the 1950 ASME Code information on SA 285-C FBQ material states 55k min. tensile, 1375psi allow. stress upto 650oF, 13k upto 700oF & 11900 upto 750oF. Information from the 1951 drawings state this material shall have "shear test per ASME Code case #896 required (1948 ruling)"...

Summarizing all of my findings: I looked closer at the code concerning UG-36 (c) (3) (a) on pages 38 & 39 and as per the Eng-Tips replies. The definition of "required minimum thickness of 3/8" is the minimum thickness required in the corroded condition. I am basing this definition on UG-16 (e)...

How do you folks define "required minimum thickness of 3/8" or less" for 3-1/2" or less finished openings? Does this mean the "nominal" or "computed" thickness of the shell? I believe it means the computed thickness. (Example: If the shell nominal thickness is 1/2" plate and the computed is...

We have a 1951/52 vessel "alteration" to do and the shell material along with some very large nozzles and all reinforcement pads utilize SA 285-C FBQ material. I know that FBQ means Fire Box Quality and I have seen it used with other materials also. Does anyone out there know if all SA 285-C...