What do you typically do downstream of vent & drain valves on high pressure & high temperature lines?
Within B31.1, paragraph 114.2.1 restricts or prohibits threaded connections in these circumstances.
A pipe spec I’m dealing with includes threaded nipples and caps which are intended for use...
ASME B16.5 doesn't include socketweld or slip on flanges at CL2500. Slip on flanges are also restricted to small bore sizes in CL1500. Can anyone say why?
Despite that, I've seen multiple pipe specs listing B16.5 CL2500 SW flanges. Apparently things have been bought and built that way, but...
For stub ups from underground piping, what accuracy (and/or precision) do you design for? What is actually achieved by construction?
Of course there's a story behind this. On a recent job, a nameless construction partner was off from a namless design firm's coordinates by more than a foot and...
ASME B31.1 stipulates that pipe stress calculations be done with the nominal dimensions of pipe. This is clear enough for schedule pipe: 14" S-XS should use a 0.5" wall thickness in stress calculations without regard for an under tolerance on thickness.
What do you consider the "nominal...
Is there a DIN, BS, EN, JIS or other common dimensional standard equivalent or comparable to ASME B16.11 for forged fittings?
I hope someone with broader horizons than myself can answer without expending more than a few seconds. My google searches and the reference books I have didn't turn up...
Reference: thread378-162152
Looks like Mr. Breen found a copy of the Corner and Lada supports a few years ago, but I cannot find anything now.
Anyone still have a copy that they can share?
- Steve Perry
http://www.linkedin.com/in/stevenhperry
This post is designed to provide accurate and...
Has anyone happened across any worthwhile articles on friction that would be applicable to pipe supports?
Mr. Breen seems to indicate there was one in this years old thread:
http://www.eng-tips.com/viewthread.cfm?qid=38508&page=1
I know the rules of thumbs, I know some entities have decreed...
Cross posted from a linkedin discussion started by L.S.Thill. It was news to me but maybe it has been mentioned here before.
From the WRC website:
Precision Equations and Enhanced Diagrams For Local Stresses In Spherical and Cylindrical Shells Due To External Loadings For Implementation of...
Can anyone share an independent evaluation of 18Cr-16Mn impellers in service with a high potential for cavitation?
X-Cavalloy is the Flowserve trade name for the alloy. I have reviewed the Flowserve literature but am hoping for actual user experience.
Steve Perry
Originally posted, mistakenly, in the metallurgy forum. I am not trying to double post. This belongs here in welding. -SP
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Can someone double check my interpretation of Section IX QW-200.2.(f) and QW-200.4?
Proposed WPS:
GTAW 1/4" <= t <= 1/2"
Supporting PQR:
Coupon t = 1"
Root to 0.5"...
This probably falls into "who cares?" but I'm still curious.
Reference B31.1 equations 1A (S_A), 1B (S_A liberal), 11a (S_L), and footnote 2:
"For materials with a minimum tensile strength over 70ksi, eqs (1A) and (1B) shall be calculated using S_c or S_h values no greater than 20ksi, unless...
Anyone have ideas on where to find yield values for P91 material at higher temperatures?
ASME Section II Part D Table Y-1 only goes up through 1000°F.
- Steve Perry
B31.1 table 121.5 note C indicates that, in figuring the spans suggested, the max bending stress is 2300 psi and max sag is 0.1".
Is there any rhyme or reason behind the 2300 psi and 1/10 inch?
Can anyone guess why this suggested table would be included in B31.1 but not B31.3?
- Steve Perry
The B31.1, B31.3 piping codes plus ASME Section 2 list ASTM/ASME A182 Gr F22 in two classes, 1 and 3. There are different stress values given for the different classes
B16.5 and B16.34 give pressure / temperature ratings for only F22 Cl 3.
First...
has anyone encountered a ASTM A182 F22 Cl 1...
I'm attempting to apply Sec III article Y-5000 to a B31.1 system. S_c and S_h come out of B31.1 appendix A. S_y though is only listed in B31.1 as a specified minimum (assumed at 70°F). I'm able to go back to SecII Part D table Y-1 to get most yield values across the temperature range (and the...
After a let down valve, a condensate line flashes ~14% by mass to steam.
Is H20 at quality X=0.14 steam or condensate?
After working out the mixture's volume, this condensate line has been sized (by "others") for ~100 ft/s flow.
-SP
I have found ASME Section II Part D tables 5A and 5B in Excel format on their website...
http://www.asme.org/Codes/Publications/Section_IID_2.cfm
I was unable to find anything similar for ASME B31.3 Appendix A Table A-1. Does anyone know where to find this table in an Excel-friendly format...
Which is more applicable to the scenario below: WRC 198 or WRC 448? Or is there another standard that might fit better? I have only access to the descriptions available at the forengineers.org at this point and would like to recommend the firm buy one or the other but not both.
My problem:
I...
I'm looking for 26 through 30" slip-on flanges in the 300# class. I understand that B16.47 only covers WN and blind flanges, but is anyone aware of slip-on flanges that can be used opposite B16.47 series A 300# flanges? Or are WN the only option?
I've looked at Alaskan Copper (no 300# slip...
