Re: [MW:9191] RE: 9181] RELATION BETWEEN WPS & WPQ THICKNESS LIMITS.

Hello,

1. Validity ranges: A possibilty to find your answers can be found at www.gowelding.com
On the homepage you'll find "Weldprocedures". Click this item.
Then the page with range calculators (see att) will open.
2. A possible PQR - WPQ thickness limit relation: To my opinion there is no such relation. The ASME code separates very strict between skill judgement (performance testing) and technical suitability judgement (procedure qualification). There simply is no relation between both subjects.

Best Regards,

Huub.

2011/1/12 Vinod Kataria <vinod.kataria@blissanand.com>

Dear All,

Please see code reference as below:-

QW-451.2

GROOVE-WELD TENSION TESTS AND LONGITUDINAL-BEND TESTS

Thickness t of

Range of Thickness T Deposited Weld Metal

of Base Metal Qualified, Qualified, in. (mm) Type and Number of Tests Required

in. (mm) [Notes (1) and (2)] (Tension and Guided-Bend Tests)

[Notes (1) and (2)] [Note (2)]

Face Root

Thickness T of Test Tension, Bend, Bend,

Coupon Welded, in. (mm) Min. Max. Max. QW-150 QW-160 QW-160

Less than 1⁄16 (1.5) T 2T 2t 2 2 2

1⁄16 to 3⁄8 (1.5 to 10), incl. 1⁄16 (1.5) 2T 2t 2 2 2

Over 3⁄8 (10) 3⁄16 (5) 2T 2t 2 2 2

NOTES:

(1) The following variables further restrict the limits shown in this table when they are referenced in QW-250 for the process under consideration: QW-403.9, QW-403.10, QW-404.32,

and QW-407.4. Also, QW-202.2, QW-202.3, and QW-202.4 provide exemptions that supersede the limits of this table.

With kind regards,

Vinod Kumar Kataria

GM - Operations

Bliss Anand Private Limited,

92B/93B Sector 5

IMT Manesar,Gurgaon,

National Capital Region Delhi.

India .

Phone : +91-124-4366000 (9 Lines)

Mobile Phone : +91-9560199004

Fax : +91-124-2290884

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Venkat Ramulu
Sent: Tuesday, January 11, 2011 8:27 PM
To: materials-welding@googlegroups.com
Subject: [MW:9181] RELATION BETWEEN WPS & WPQ THICKNESS LIMITS.

 

Dear All,

Any body can clarify,

 

1)We have established WPS & PQR for P8 matirial,7.11 thick with  -196ºC impact.Based on this WPS, shall I qulify WPQ with 5mm  thick ?. If yes what will be the range of qualification.
2) Other WPS & PQR for P8&3.4 thik with  -196ºC impact. Based on this if  a WPQ is qualifide with 5mm thick,what would be the thickne range of qualification? Is it 1.7 to 6.8 or 2.5 to 10mm? give code reference.

3) Is there any relation between procedure & performance qualification thickness limits.Give me code reference.

Regards,
C.Venkatramulu.

 

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.