THICKNESS RANGE-ASME SEC 8 DIV 1 & ASME B 31.3 & ASME SEC IX

[kany]

Hi all,

I have vendor PQR's and WPS's for review . The construction code is ASME Sec 8 Div 1. In one impact tested PQR, thickness of the plate is 8 mm and the thickness range of the WPS prepared from this PQR is 8mm-16mm.But as I remember, regarding ASME B31.3 if impact tested, the qualification thickness is t/2 - t+6 mm.

Is it so for ASME Sec 8 or do I have to use ASME Sec IX?

I do not have ASME Sec 8 code for review so could you please send the reference numbers & tables in ASME Sec 8 Div 1?

Regards

Kaan

 

[SJones]

If you don't have the codes, how can you review the documents?

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04

 

[kany]

According to your replies and discussion, I will forward the tables and references to vendor for their own review.

That was not the reply I was expecting.

 

[vpl]

kany

To be blunt, you have to buy the Codes. This forum does not support theft.

Patricia Lougheed

******

Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of the Eng-Tips Forums.

 

[kany]

Is to learn something, get some help about this issue from your side and share the info with another one considered as theft?

I really didnt get your point of view..

Regards

Kaan

 

[vpl]

Kaan

To learn something is not theft. However, asking for the tables from ASME Section VIII because you don't have them, could be considered intellectual theft as those documents are copyrighted.

However, your latest response makes me think you are not a native English speaker and that I might have misinterpreted what you were asking.

Am I correct that you want to know:

1) What is the (maximum and minimum) thickness for an impact test plate when the Code of construction is ASME Section VIII, Division 1?

Specifically, you were given a sample that ranged from t (8 mm) to 2t (16 mm)and you believe you remember that the thickness range should be from t/2 (4 mm) to t + 6mm (10 mm).

2) Where is the above specified -- is it in ASME Section VIII or in ASME Section IX?

I don't know the answer to question 1 off-hand, but I believe that Section IX is the appropriate section.

Patricia Lougheed

******

Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of the Eng-Tips Forums.

 

[weldtek]

ASME Sec IX would support work constructed to ASME Sec VIII. Per those rules typically, if the test is conducted on material < 6 mm, qualified thickness is 1/2T thru 2T. It can be more complicated and more details are needed to provide a complete assessment.

 

[RPRad]

ASME IX is the correct place to find information specific to weld procedures which include impact testing

I dont recall any of the ASME design codes, that spec ASME IX, having any info specific to the geometry or thickness coverage of weld test coupons.

Point being that once qualified appropriately under section IX the weld procedure can be used for fabrication performed under Section XIII, B31.3, B31.1 etc

R

 

[Kiwi2671]

Kaan,
The applicable fabrication / construction code always overrules the requirements of ASME IX.
However, as weldtek has stated ASME IX impact test essential variables are applicable to ASME VIII construction (UG-84(h)(4)).
As you have noted B31.3 is where you must be careful as the thickness requirements can vary hugely between ASME IX and B31.3,
Regrds,
Kiwi

 

[Guest102023]

I think the issue here is more basic even than acquiring the appropriate Code documents. The questioner clearly has at best a rudimentary grasp of the logic and structure of the Code, and therefore he (and his boss) should not be reviewing WPSs that are an integral part of a system designed in the first place to enhance public safety.

This is reflective of a more widespread problem: too many amateurs doing the work of experienced professional engineers. The Code is not a how-to manual anyone can simply crack open and start home cooking with. Find a consultant in your area with experience in both the PV Code and in welding engineering (they often go together). Note I did not say 'experience in welding'.

Sorry to be so blunt about it.

 

[vpl]

kany last visited the site on August 24 and isn't even getting e-mail updates (according to the "Notify me" indicator in the upper right hand corner.) Evidently we scared him off.

Patricia Lougheed

******

Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of the Eng-Tips Forums.

 

[kany]

Thanks for all your kind responses.

By the way, Patricia

I was dealing with my personal stuff , it wouldn't be a lie if I said that I lost my enthusiasm after your response. Anyway not a big deal.

Regards

 

[lahane1443]

Kiwi
so if design code here is B31.3 & material requires impact test then will the base metal range will be t/2 to t+6 mm(per B31.3) i.e. 4 mm to 14 mm & not 8 to 16mm per sec IX.?

 

[smart143]

correct Lahane.

 

[stanweld]

lahane1443,
Additionally, if you were to fully qualify a procedure in accordance with ASME IX (tensile + bends + impacts) on 4 mm thick plate, the thickness qualification limits would be 2 mm to 8 mm not 2 mm to 10 mm.

 

[smart143]

Lahane,
If you want to use this 4 mm coupon PQR for piping according to 31.3 where impact is required, your limit will be 2 to 10 mm as design code is your govrning code.

 

[stanweld]

smart 143,
I must totally disagree!! The welding procedure is qualified to 2 mm (1/16") to the 2T limits of ASME IX. B31.3 does not grant exemption from the thickness limits of the qualified welding procedure not subject to impact testing.

 

[smart143]

stanweld,
Thanks for your clarification.
In any case thickness qualification can not go beyond 2T per QW 451 of sec IX. I guess i gone too much in 31.3 & overlooked this requirement of IX.