I'm not sure that's a good idea to use 45K material for valve flanged.
Table 5 of API 6A 20th Ed inherently suggest us to use 60K minimum for valve flanged,
since it consists of "body" and "flanged - integral end connection"
API 6A gives user freedom to select what material designation (i.e. 36K to 75K) provided it complies with Table 5 of API 6A.
The concern is to see in holistic approach before we choose what material designation to use.
Let's say the valve body can be configured by using two material...
Dear FEA user,
I'd like to have your opinion regarding mesh sensitivity study vs sub-modelling.
I've just started doing FEA analysis and AFAIK, it is normal that we run analysis 2 or 3 times with refined mesh
to determine what is the best approximate solution.
on the other hand, I also heard...
Dear ABAQUS user,
I'm trying to cut the analysis result view by using multi cut. the shape is cylinder (attached pic).
I've been trying to use multi cut option from Tools - View Cut - Manager and do many 'plane cut' combinations,
but i couldn't get the slice cut what i want.
Is it possible to...
As far as I know, API 6A did not mention AISI 4130.
What API control is chemical composition, in which AISI 4130 is close to that chemical specs.
chemical composition shall affect mechanical properties.
I believe it depends on what standard/specification that we need to comply, i.e. company...
Dear Abaqus user,
I'd like to simulate pressure penetration feature on ABAQUS based on axisymmetric model.
I made a model consist of seal being compressed by top body and bottom body.
Contact pressure shall be generated after top body move down while bottom body fixed.
Once the seal set, then...
If there's a book that mention all aspect on material selection, definitely i would love to have that ultimate guidance.
Unfortunately, so far i've never seen a reference that gives us complete guidance
regarding material selection, including pro-con, benefit-weakness.
On general aspect that i...
Dear all,
Now i think this become make sense.
I elaborate both of your comments, seems that 'plug 2' is the culprit.
I add some dimension for better comparison, it gives more than 50% additional load to the seal.
Anyway, thanks for the input. it proves that volume has no issue.[peace]
Dear marty007,
Thanks for sharing some thought.
Actually, i also think that volume has no impact to the seal.
however, these two results made me think that volume (V) might play some role on it as bigger volume shall expose more load to the seal.
you can see this sketch how i perform the...
Dear All,
I have a question regarding compressed gas. I'm doing some experiment for testing some seal (see hatch area on sketch below) at 10,000PSI by using nitrogen gas. in this experiment, i accidentally got some different result based on two different situation. you can see my experiment...
As far as I know,
API 6A doesn't mention that material for wellhead equipment need to be AISI 4130 for EE-NL class.
What API limit is steel composition (Table 9) which lead to mechanical properties (Table 6).
I've never come across with AFNOR material grade.
My opinion, given those AFNOR specs...
Basically, gasket is a mechanical element which objected to compression load rather than tensile.
Hence, the only important parameter is hardness.
Beside, as jose0012000 mention, you need to know design requirement and compliance against some standard.
Hello Abaqus user,
I want to simulate some mechanism using material AISI 4140 (105,000PSI yield strength). Any idea where/how to find the properties of this steel? I need to put true stress vs plastic strain data under material properties 'plastic' instead of 'elastic' modulus young & poisson...
Dear Abaqus user,
i'm doing some simulation on split ring which pushed by plug with pressure 10,000PSI and hit the housing. i've been creating parts, applying the boundary condition, interaction, mesh control that i could think of.
this is the boundary condition that i put on the system:
1...
It depends on what material class of the body want to become.
If the body was expected to have material class HH, then you have to apply cladding on the groove.
Most cases that I know,
Manufacturer (API 6A product manufacturer) need to have specs that has to be fulfilled by sub-contractor (material manufacturer).
The specs is required to limit the end result product that manufacturer required.
During specs document creation, manufacturer might use some...
Dear TGS4,
Thank you for the correction and some enlightment.
at this moment, i dont have any specific calculation that i want to finish till i come across with ASME.
In one of API 6A clause, it was mention that ASME method could be used as a method to qualify the design.
One time, i was told...
Dear ASME experts,
I need some enlightment regarding safety factor (SF) of ASME viii-2 which change from '3' to '2.4'.
Initially, i saw ASME viii-2 2004 edition that refers to ASME ii-D mandatory appendix 2,
which i thought coefficient '3' was mentioned on tensile strength limit St/'3' at...
Dear mil87,
You can check on API 6A (20th edition) clause 3.1.75 for the definition of objective evidence:
"documented field experience, test data, publications, finite element analysis, or calculations that confirm performance characteristics, as applicable."
I believe its clear enough to...
