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#12947 - 08/31/07 09:00 AM PD5500 Material data base errors
kdunks Offline
Member

Registered: 06/19/06
Posts: 7
Loc: Newbury,England
There appears to a number of errors in the PD5500 material database on PVElite 2007 relating to American materials A-106 B, A-516 70, A-234 WPB etc.
The allowable stress for A-106 B should be 160 Mpa at 50 deg C yet it is listed as 207. Values were correct in 2006 version. Has anyone else found this to be the case?
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k dunks

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#12958 - 09/02/07 02:25 AM Re: PD5500 Material data base errors [Re: kdunks]
Emile FAKHOURY Offline
Member

Registered: 04/18/07
Posts: 4
Loc: UAE
Did you upload the march 2007 build for pvelite 2007.
I believe these errors have been rectified.
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Emile Fakhoury
Project Engineer
Mob: +971 50 2150756

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#12962 - 09/03/07 01:26 AM Re: PD5500 Material data base errors [Re: Emile FAKHOURY]
kdunks Offline
Member

Registered: 06/19/06
Posts: 7
Loc: Newbury,England
Yes - currently working on August 2007 build
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k dunks

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#12975 - 09/04/07 05:11 AM Re: PD5500 Material data base errors [Re: kdunks]
Stan McKay Offline
Member

Registered: 10/21/04
Posts: 102
Loc: UK
Hi,

I couldn't find anything documented about this but check the actual allowable stress used in the calculation and I think you will find it to be as it should. The values listed in the material database for those particular materials appear to be the yield values (as in the EN database). When divided by 1.5 they will give you the correct(ish) allowable stress value. Taking A-106 B as an example, there are 2 entries in the PD5500 data base. The first has allowable stress listed as 241 MPa @ 50C which gets you 160 MPa in the calculation. The second entry has 207 MPa listed @ 50C which gets you 138 Mpa and this appears to be the ASME stress.

I hadn't noticed the dual entry for A-106 before and I don't believe the 'ASME' stress should be included as standard in the PD5500 database. This would benefit from an official clarification I think.
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Stan McKay

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#13012 - 09/05/07 09:11 AM Re: PD5500 Material data base errors [Re: Stan McKay]
kdunks Offline
Member

Registered: 06/19/06
Posts: 7
Loc: Newbury,England
I had noticed the values appeared to be correct in the main calculations and that the first value in the table was the yield for some reason. Therefore when creating a new material for the PD5500 data base is it necessary to follow the same logic?
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k dunks

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#13034 - 09/06/07 08:19 AM Re: PD5500 Material data base errors [Re: kdunks]
Stan McKay Offline
Member

Registered: 10/21/04
Posts: 102
Loc: UK
I think not...

Looking into this a bit further shows that for a new material you need to specify both allowable stresses and elevated yield values before the database will accept the merge. After a successful merge the allowable stress value specified will be used as expected in the analysis.

In the given PD5500 database it is only the materials with a EN/BS Spec No set to "BS Code Only" that have yield values entered against the allowable stress fields. These "BS Code Only" materials do not have any elevated yields specified so must benefit from some COADE jiggery-pokery!
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Stan McKay

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#13036 - 09/06/07 08:29 AM Re: PD5500 Material data base errors [Re: Stan McKay]
Scott_Mayeux Offline

Member

Registered: 12/23/99
Posts: 347
Loc: Houston,TX,USA
Stan,

It seems like the second lot of A-106's etc need to be removed from the database. We will make every attempt to resolve this in the near future.
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Scott Mayeux
CADWorx & Analysis Solutions
Intergraph Process, Power, & Marine

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#13042 - 09/06/07 09:38 AM Re: PD5500 Material data base errors [Re: Scott_Mayeux]
Ray_Delaforce Offline
Member

Registered: 01/02/03
Posts: 743
Loc: Houston, TX
I suppose I have to own up. I am the culprit, as I have the task of maintaining the PD 5500 and EN 13445 material databases. I need a little time to sort this all out.

I shall report back to the forum as soon as I have looked into the matter. I intend to get to it as soon as possible.

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Sincerely,
Ray Delaforce
CADWorx & Analysis Solutions
Hexagon PPM

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#13047 - 09/06/07 10:40 AM Re: PD5500 Material data base errors [Re: Ray_Delaforce]
Ray_Delaforce Offline
Member

Registered: 01/02/03
Posts: 743
Loc: Houston, TX
I have now sorted out the problem. I had inadvertently duplicated some materials (one of which was A-106 B) at the end of the master file with some wrong values. I have removed them.

Now, according to PD 5500: 2006, the correct values at ambient temperature are as follows:

Yield strength Re = 241 MPa (35 000 psi)
Design stress f = 161 MPa (23 350 psi)

I have made a new PD 5500 material database file called ABS.BIN which is a binary file. You can download this file from our website:

http://www.coade.com/support_downloads.asp?varflag=PVElite&varreturn=dl

The file has to be placed in the SYSTEM folder under PVElite 2007. If when you installed PV Elite 2007, you did so in the default folder, the system folder can be found at:

C:\Program Files\COADE\PVElite 2007\system.

If PV Elite 2007 has been installed elsewhere, you will to do a search to find the system file.

I hope this brings this troubling issue to a close and oh yes I apologise for any inconvenience caused.
_________________________
Sincerely,
Ray Delaforce
CADWorx & Analysis Solutions
Hexagon PPM

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