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I have always heard that for assembly of bolted joints in heat exchanger, pressure vessel etc, it is always better to use Nickel Based Lubricant compound versus Copper based or Moly based. I am talking with reference to application in a conventional Petroleum Refinery only. Bolting material...

GenB/Metengr, Sorry couldn't get back earlier with the procedure. Contractor has mentioned that the Heat treatment method is using Resistance heating. Heating rate not to exceed 100 deg F/sec. For P1 final temperature is 1200 to 1250 F, therefore it would mean that the final temperature could...

Steam should not be routed to condensate flash pot only condensate. Failures at elbow is common problem in overloaded condensate system where steam traps are not functioning properly or steam line connected to condensate system by mistake. You could try stellite coated elbow. It should give you...

Thanks metengr. Initially I was thinking to use UCS-56 but talking to one of the fabricator, he told me that they do SR for 15 sec and then just leave it to cool in ambient air. He claimed that they have done thousands and never had any issues or complaints.

I am looking for some information on Stress Relieving requirements of Carbon Steel Tubes U Bends for Heat Exchanger (Material: SA179, Code API 660, ASME Sec VIII D1): API 660 is not very clear and leaves it for the customer to decide. What should be the best approach in the absence of clear...

I am looking to purchase some flexible hose which are to be used in high pressure application (600 psig) at high temperature (700 deg F). Material of construction required is SS304 Corrugated with SS304 Double Braided. I am not sure if an hose for such a high pressure application would be...

spd60, check this website link. Hope this helps to some extent. http://www.lacotech.com/products/997300658_leaktechref.pdf

Only through a Finite Element Analysis you could determine stresses. Also, in edge settlement you would have to check plastic strain. I don't remember off hand but in API 653 it is mentioned that how much is allowed. If the strain exceeds the allowable limits you would have to replace plate...

In B31.3 or ASME Sec VII D1, there is no code restriction that would restrict you from keeping two welds close or overlap. If you are worried about the quality of the joint, you could do a mock up test and go for 100% RT.

I was able to use documents given under the help menu to model vessel. It is a great feature given in the software. Would it be possible for anyone on this forum to post an input file (.c2) for a simple vessel model. Just wanted to see if I have learned it correctly. Thanks in advance

tananT, Check this link which I found on the internet. http://files.asme.org/asmeorg/Governance/Volunteer/CareerSeries/9666.pdf page 23, 24, 25 would give you some information. http://files.asme.org/asmeorg/Governance/Volunteer/CareerSeries/9666.pdf

metengr I understand that it is not a good practice but I am trying to find is what kind of failure mechanism could be expected on that butt joint. Is failure going to be in short term or long term. Thanks

API 560 Section 7.1.4 does not allow furnace tubes to be circumferentially welded to make up for the effective tube length for example 15' of two length of pipe to make up for 30' effective tube length by circumferentially welding two pipe ends. Does anyone know why and what are the risk of...

MJCronin: I am using my company's software to learn in my free time. I would look for the manual in the library. Do those manual have solved examples. Do you know which part or chapter it may be covered under. BigInch: I guess I posted the question under wrong forum. Could you send me a link...

Hi ! I am trying to learn how to model piping in Caesar to be able to connect it to a vessel nozzle. I am familiar with creating and analyzing simple piping models. What I want to do is include vessel with pipe and let the software calculate displacement for the vessel connection. Is there any...

On a pipe which has bulge, there would location of high stress concentration on either side where the bulge ends. These points would tend to yeild and could initiate crack under load/stress (on a pipe it would form cracks in the longitudinal direction). Again all this would depend on how much...

joe1001: did you try putting expansion loops. avoid expansion joints if possible.

Hi All, I have a vertical vessel 70 ft tall (60inch ID x 1" thk wall)where one of the manway is located almost 35 ft down from top of the vessel. We are doing some repairs on the manway neck and it would require PWHT due to service requirement. I am just wondering whether I need to support the...