Many companies in my industry weld API 2H per ASME BPVC IX, including my company for many years. We've been using the "out" that the MTRs for the API 2H plate also list A537 and/or A633, which are listed ASME IX materials. However it seems like this isn't quite right.
Should I be specifying...
In Ansys, when we Refresh Geometry on the Mechanical screen, on most of my user's computers, Ansys loses all the selected surfaces. It really sucks (technical term) to have to reattach all the connections, loads, and fixtures etc each time we iterate the design. It did not do this before when...
We're looking to make some thick-wall piping components out of A694 F60 material. The final part's cross sections range from 4in to 9.5in. Top spec is API 17G.
We're considering forging & then rough machine the part to have surfaces within 1/2" of the final part. Then heat treating (Q&T) to...
Could one of you point me to the right code / rule regarding wireless E-stop functionality?
Specifically - can a button be labeled "E-stop" on a wireless remote, if the system is designed to NOT shut down on event of a wireless failure? I am not seeing in NFPA 79.
I ask because the other...
My governing standards for many of my projects require Charpy testing per ASTM A370. (Per ABS rules, DNV rules, ASME, etc).
However, nearly all the MTRs for available stocked material, that include Charpy results, do not list which standard the Charpy testing was done under.
So far this has...
Anyone here familiar with 8C and or FEM 1.001?
8C references FEM for fatigue analysis method.
Problem is I'm getting an overly conservative FoS.
I have a high number of cycles (>>2m), a small portion of which is high load, the majority low load. FEM allows for this with a fatigue spectrum...
I have a 75in diameter pilot that needs to fit with a minimal interference. The two parts are made in different places and likely at significantly different ambient temperatures.
I thought I was being smart in calling out different dimensions depending on metal temperature (ie 75.000@80F...
Can someone point me to a program/excel that helps calculate order quantities for steel beams and other shapes?
Ie if this is my BOM:
qty4 15ft
qty6 9ft
qty4 3ft
...
The software sheet could take that and tell me how many 40ft sticks I need to order.
Didn't have any luck trying to find this on...
I have a customer that wants to use 4340 for an asme vessel. Can anyone point me somewhere that explains why 4340 isn't listed in IId? I'm thinking there must be a good reason.
The other threads here mention things about it having too a high carbon content, but I can't find a reference...
I have a pv made from 17-4ph ss subject to 2000 cycles design life.
Equation 5.18 (p5-16) says I can skip the fatigue analysis if my number if cycles is less than "N(C1*S)".
S is the allowable stress (58ksi) from Sec II. C1 is 4 from a table. So I am checking to see the number of allowed...
I'm having trouble calculating test pressure for my vessel under this code.
Rule 8.2.1 (p8-4) has a pair of calculations for calculating test pressure. One involves a term ST, without mention of what it ST is.
Test pressure 1 = 1.43 x MAWP
Test pressure 2 = 1.25 x MAWP x ST / S
I'm pretty...
Has anyone come across a list of words to describe part features? I'm making some pretty complicated parts and have run out of words to describe them and their features.
Some examples of what I'm looking for:
gusset
pilot
countersink
race
flange
lobe
Specifically - what is a good word for the...
Is anyone aware of any literature on seal friction as applied to high pressure cylinders (~3000psi)?
I'm designing a light load passive heave compensator that uses a pneumatic cylinder. Cylinder stiction looks like it will cause problems, and I want to minimize it.
I found this book one...
How do I apply the AGMA recommended backlash to ring gears?
Specifically:
I have a 92" PD ring gear and a 18" PD pinion. DP=1.
If I go by radius1-radius2 (actual center distance), the AGMA table recommends 0.040-0.060.
If I go by radius1+radius2 (spur gear center distance), the AGMA table...
Specific problem:
I have a function w(s) = ...
When I try to graph the function using the variable 's', I get an error because the graph thinks s is a second and not a variable.
s:=s doesn't work as implied on other web pages.
How do I undefine s?
General problem:
The above doesn't seem to work...
I derived this formula for calculating friction for round plain bearings:
f = pi/2 * ? * P
f = frictional force
? = Coefficient of sliding friction
P = Radial force on bearing
I would expect this formula to be published in engineering books, but I'm not finding it. Can someone provide a...
Info here for the next person that searches for "number of loaded teeth":
http://www.roymech.co.uk/Useful_Tables/Drive/Gears.html#CR
Called contact ratio.
Does anyone here calculate weld shrinkage?
Yes I know there are a bazillion factors. =)
There was good info here but no numbers:
http://www.eng-tips.com/viewthread.cfm?qid=142412
My specific problem:
I Have a base plate and a 1.5" thick, 18" tall vertical plate welded to it, with a bevel...
I'm getting very different results when I try to use symmetry in Ansys 12.
I have a simple box with a force on the bottom; see picture.
When I run FEA on the whole thing, the box bottom deflects 0.1".
When I run it in symmetry, ansys tells me the box bottom deflects 0.4".
Setup for FEA...
I have a weldment drawing with views, a cutlist, and balloons on sheet 1. On sheet 2 I have views of the individual weldment members.
How can I make view labels for each of the weldment members?
Ie... On the Sheet 1 cut list - Item 03 has QTY 4, descr TS6x6x0.25, material ASTM A-500, part...
