Hi,
The new Addendum 2, Appendix F.4.1 for the max design pressure, definition for the participating roof thickness to now include some kind of composite roof. I have never seen a "stiffened" roof plates as described in the new text. What exactly are they refering to? All the self-supported...
Hi,
I went to API's web site looking for errata for the 11th Ed, Addendum1, but found none so I thought some of you might be able answer this simple question.
I think there is a typo in 5.10.2.6, first paragraph. I believe the last sentence was meant to say "When a Purchaser....a frangible...
Hi all,
Are there any negative issues that I should be aware of in regards to slender HX, ie., shell length is much greater than diameter, lets say L/D > 5.
I have no concern with thermal design for long and slender hx shape but from a mechanical perspective, too long and slender a vessel the...
I have worked on F-shells with fixed and removable longitudinal baffle but have never seen an insulated baffle. Can anyone explain or direct me to a site with a drawing or photo to show me how this “insulating” feature is done? Is it by an air gap between two welded plate spaced 3mm apart or...
Hi all,
I looked in API's web site and could not find any information on what changes occured in API610 from 10th to 11th ed. Can anyone suggest where I can find a quick summary to review. I do not have the 11th ed yet but just like to get a heads up. thanks.
In sour service,the typical practice is to confirm parent metal hardness before acceptance of plate or pipe product. MR0175/ISO15156 7.3.2 provides for this but does not specify where and frequency of hardness testing. For plate product (this would include ESW pipe product) my memory...
Hi,
I have seen insulation specs calling out mineral fibre insulation per ASTM C547 and C553 for service up to 450°C since the 80s. Now, I read one EPC's spec on insulation saying mineral fibre insulation shall only be use up to 230°C because the binder in the insulation will break down above...
Hello,
Wear rings at shaft and impeller can be set in place by either welding, by axial set screw or radial set screw. Which methods are most preferable and why? the inquiring mind wants to know. thanks.
Although I have designed and purchased storage tanks on and off since 1998, I have not heard of the possiblity of not doing a static hydro test as the final leak testing of a NEW tank. In the last 2 years, I have seen odd specification to perform fracture mechanics analysis to determine...
Instead of tacking onto the discussion on NPSH below, I thought I start a new thread.
I know of the pump manufacturer's NPSHR test at 3% head loss. But is there a 0% NPSHR test? Of course anything is possible but is doing a 0% NPSHR test a norm or uncommon? Is is exactly as the name...
Ok, dumb question from a non pump guy - me.
ANSI pumps as defined by ASME/ANSI B73.1 are suppose to be end suction, top discharge, L-foot, single stage pump, with defined dimensions per the standard. As far as I know, an ANSI pump is only suitable for up to the pressure rating of a 150# C.S...
There was a good thread going on in this forum regarding material substitution and someone said this,
"With respect to the sour service issue in Alberta, there seems to be a strong preference among our Alberta clients to default to Category II whenever a service is "sour", if only to get the...
I googled this question and cannot find a definitive defintion so I'm trying here.
In ASTM standards such as A216 and A234, what does the WC and WP stands for? Is there an ASTM document that tells us exactly what the meaning for these?
W = Wrought or weldable?
P = pipe?
C = carbon or...
I am researching on the subject of boilers for SAGD application. I am familiar with OTSG but have no experience with drum boilers. Can anyone here tell me what type of drum boiler is used for a thermal enhanced recovery (SAGD) application and who makes them? Is it the same type of dual drum...
Hi all,
I have never worked on off-shore design so I'm asking these questions. I'm hoping people who have designed for off-shore can help me figure out some strange requirements.
I am reviewing corporate standards from a company that primary do their work off-shore. Their vessel standard...
Hi,
I'm a mechanical engineer wanting to get some insight into what to when a geotext liner in a bermed area get pierced by a pile. I’m asking this question in hope to get some basic knowledge so when I ask our Contractor to recommend a solution, I will have some fore knowledge to know if they...
Hi all,
I am hoping some of you "old-timers" might know how I can get an electronic copy of the classic paper "No Fooling-No Fouling" by Mr. Charley Gilmour from 1963 or 1965. I have searched the web and have not found anything of use thus far.
I have been a proponent of no fouling factor...
Hi all,
I'm not into production but just want to know what is a long string and a short string inside an injection well? BTW, this question relates to a SAGD steam injection well.
I would love to read more on how the well is suppose to operate. I just need cursory knowledge so I can...
I have a really bad copy of an article from way back when called "Predict storage-tank heat transfer precisely",
by Jimmy Kumana and Samir Kothari - published in
March 1982 issue of Chemical Engineering magazine.
The copy I have I can't even read some of the tables. I have no luck finding in...
Hi all,
I have done some searches in this forum to find out what is the best equations to use to calculate the convective heat transfer coefficient. I think the best tip I've seen so far is a reference to ASTM C680. I do not have this standard. I'd try to find it in my local university...
