4 Asme Sec Ix Wps Pqr Slide 1 to 35

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30 เมษายน 53 ASME Section IX, WPS/PQR Prepared by

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A Welding Procedure is a recipe of variable welding parameters, which will produce the same results of certain

quality & properties of weld if carried out in the same way

eac meOr a procedure which has been welded and tested to a

specification such as ASME IX.

weldment NOT the skill of the welder.



It is a document of a qualified welding procedure

needs in order to carry out the work.

as een ssue as a resu o a success uWelding Procedure test (WP test).

Additional WPS’s can be issued on a successful

WP test as long as they remain within the Extentof Approval.


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Welding of a

test coupon

Construction Code

Materials

From all range of

welding variablesrom e

Range of

variables

Design

Impact testingABC

Nonessential;

Supplementary

ABC WPS ABC PQR

.

Record of welding variablese ngvariables Essential;

Nonessential;

Record ofactual variableand test results

Specimen preparation

Mechanical test

Supplementary(if applicable). Date

sign


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Once the welding of test coupon has been completed under

some welding variables , No Radiography or any

The test coupons shall be Mechanically tested to ensure that

the desired level of mechanical ro erties have been met

If all the desired properties have been met, then a procedure

results reviewed, and the draft WPS then becomes qualified

rom s a a, a wor a e ocumen or pro uc on we ng s

prepared and called a Welding Procedure Specification. (WPS)

.



QW-200.1 Each manufacturer and contractor shall

prepare written Welding Procedure Specifications whichare defined as follows.

(a) Welding Procedure Specification (WPS). A WPS

s a wr tten qua e we ng proce ure prepare to provide direction for making production welds to Code

.

used to provide direction to the welder or welding

o erator to assure com liance with the,Code re uire-ments.


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QW-200.2 Each manufacturer or contractor shall be

required to prepare a procedure qualification record which is defined as follows.

QW-200(a) Procedure Qualification Record (PQR). A

PQR s a recor o t e we ng ata use to we a testcoupon. The PQR is a record of variables recorded

.

the test results of the tested specimens. Recorded vari-

ables normall fall within a small ran e of the actualvariables that will be used in production welding.


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The terms “manufacturer” or “contractor” are:

Own the certificate of authorization, can be a

conventional or a nuclear stamp(s), where required

Responsible for the welding

Can be an installer, assembler or fabricator

Can be an organization effective operational control of

welding qualification for TWO or more companies of

different name, see QW 201.


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Question (1): If Company A reviews and approves

Section IX qualified WPS’s submitted by Companies Band C for a given project, may Company A use Company

B and C‘s WPS’s?

Rep y 1 : No. Question (2): If Company A reviews and approves

ec on qua e s su m e ompan es an

C for a given project, may Company A authorize

‘ ’

Reply (2): No.


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Question: May a contractor provide his qualified

weldin rocedure s ecifications for use b his

subcontractors, to perform welding in accordance

with the re uirements of ASME BPV Code

Section IX?

Reply: No.


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Question: In a contract involving piping construction work,our company subcontracted the piping prefabrication work to asubcontractor. This subcontractor is mana ed b our com an

but has a different name. The subcontractor proceeded toqualify welding procedures which were conducted in the

presence and with the approval of our company’s welding

eng neer w o mon tore t e we ng o t e test coupons ansigned approval on the PQRs. The Quality Control System ofthe subcontractor and our company fully described theopera ona con ro o proce ure qua ca ons. as our c enright in rejecting the use by our company of the subcontractor

qualified welding procedures for the erection work of the

Reply: This is a contractual issue, which ASME does notaddress.


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Three construction companies have participated in a

nuclear power plant construction project as a consortiumcontractor. They have a unified Quality Assurance

Program, but the consortium does not hold a Certificate

.

holds its own Certificate of Authorization.

“

names in an organization” in QW-201 apply to the

consortium described in the Back round? Reply: No


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Background Two companies are contracted by a clientcompany to undertake pipe work installation on its facility. Allsta es of the Weldin Procedure ualification Processes forthe two contracted companies are witnessed by the clientcompanies representative and the documentation duly stampedand signed as accepted by the client.

Question (1): May these procedures be used by the clientcompany?

Re l 1 : No.

Question (2): Does the client company have to re-qualify these procedures in order to perform in-house maintenance a t a laterdate usin all the same essential and nonessential variables with its own qualified welders?

Reply (2): Yes.


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WPSs may be used by the new owner(s) without

requalification, provided all of the following are met:(a) the new owner(s) takes responsibility for the WPSs and

PQRs

(b) the WPSs reflect the name of the new owner(s)(c) the Quality Control System/Quality Assurance Program

reflects the source of the PQRs as being from the former

manufacturer or contractor


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Background: Company A and Company B merge

divisions to form a new Company, C. Question (1):May the new Company C , use PQRs and

WPSs developed previously by Company A and

Reply (1): Yes, provided operational control is inaccordance with QW-201.

Question (2): May the new Company, C, use the centralmaterials laboratory of Company A to develop WPSs and

Reply (2): Yes, provided operational control is inaccordance with W-201.


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Background: When one of a company' s plants is sold, it

is not clear if the new owner can use the WeldingProcedure Specifications (WPS) and Procedure

Qualification Records (PQR) qualified by the original

.

using those WPS/PQR.

B. May both Company A and Company B use the

WPSs/PQRs reviousl ualified b Com an A Reply: Yes. provided the requirements of QW-201.1 are

addressed by Company B.


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on en s o e . e comp e e s a

describe all of the essential, nonessential, and, when

welding process used in the WPS. These variables are

listed in QW-250 through QW-280 and are defined in

Article IV, Welding Data.The WPS shall reference the supporting Procedure

Qualification Record(s) (PQR) described in QW-200.2.

The manufacturer or contractor may include any other

a Code weldment.


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QW-401.1 Essential Variable

.

condition which will affect the mechanical

proper es o er an no c oug ness othe weldment (for example, change in P-

Number, welding process, filler metal,

electrode reheat or ostweld beattreatment, etc.).


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QW-401.3 Supplemental Essential Variable (Procedure). A change ina welding condition which will affect the notch-toughness properties of a

weldment (for example, change in welding process, uphill or down vertical, , , . .

When a procedure has been previously qualified to satisfy allrequirements other than notch toughness, it is then necessary only to preparean additional test coupon using the same procedure with the same essentialvar a es, u a ona y w a o e requ re supp emen ary essen a

variables, with the coupon long enough to provide the necessary notch-toughness specimens.

When a rocedure has been reviousl ualified to satisf allrequirements including notch toughness, but one or more supplementaryessential variable is changed, then it is only necessary to prepare anadditional test coupon using the same welding procedure and the newsu lementar essential variable s with the cou on lon enou h to provide the necessary notch-toughness specimens. If a previously qualifiedweld procedure has satisfactory notch-toughness values in the weldmetal, then it is necessary only to test notch-toughness specimens from the

.


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c anges o e . anges may e ma e n e

nonessential variables of a WPS to suit production

changes are documented with respect to the essential,

nonessential, and, when required, supplementary essen-

tial variables for each process. This may be by amend-ment to the WPS or by use of a new WPS.

Changes in essential or supplementary essential (when

required) variables require requalification of the WPS

essential or supplementary essential variables).


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Question: Does QW-200.l(c) require that there be a historyof changes such as margin notes or other record

essential, nonessential, or supplemental variables each time

a WPS is revised?

Reply: No.


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(d) Format of the WPS. The information required to be in the

WPS may be in any format, written or tabular, to fit the needs of each, , ,

and, when required, supplementary essential variables outlined in

QW-250 through QW-280 is included or referenced.

Form QW-482 (see Nonmandatory Appendix B) has been

provided as a guide for the WPS. This Form includes the required

data for the SMAW, SAW, GMAW, and GTAW processesIt is only

a guide and does not list all required data for other processes. It also

lists some variables that do not apply to all processes (e.g., listing

shieldin as which is not re uired for SAW . The uide does not easily lend itself to multiple process procedure specification (e.g.,

GTAW root with SMAW fill).


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Each manufacturer or contractor shall maintain a record of

the results obtained in welding procedure and welder andwelding operator performance qualifications. These

records shall be certified by a signature or other means as

’ ’

Control System and shall be accessible to the Authorized

Ins ector. Refer to recommended Forms in Non

mandatory Appendix B.


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SMAW Shield Metal-Arc Welding

SAW Submerged-Arc Welding -

&FCAW & Flux-Core-Arc Welding

GTAW Gas Tungsten-Arc Welding

-

ESW Electroslag WeldingEGW Electrogas Welding

EBW Electron Beam Weldin

Stud & Inertia and Continuous Drive Friction Welding

Resistance Welding

LBW Laser Beam WeldingFlash Welding

Each welding process has its own welding variables (table QW-252 to 265)


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QW-250 WELDING VARIABLES

QW-251 GeneralQW-251.1 Types of Variables for Welding

Procedure Specifications (WPS). These variabless e or eac we ng process n a es -

252 through QW-265) are subdivided intoessential variables su lementar essentialvariables, and nonessential variables (QW-401).The "Brief of Variables" listed in the Tables areor re erence on y. ee e comp e e var a e n

Welding Data of Article IV.


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Question (1): Is it required that all of the essential and nonessential

- -

addressed in the WPS, even though some of these variables are not

app ca e?

.


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QW-250 WELDING VARIABLES

QW-251.4 Special Processes

- and hard-surfacing weld metal overlays are as indicated in thefollowing tables for the specified process. Only the variablesspecified, for special processes shall apply. A change in thecorros on-res s an or ar sur ac ng we ng process s a requ re

requalification.QW-218 Applied Linings

- . s or a ac ng app e n ngs s a e qua ein accordance with QW-202.2(a), (b), or (c).

QW-219 Flash Welding

as we ng s a e m e o au oma c e ec r ca res s anceflash welding of tubular cross-sections. Procedure qualification testsshall be conducted in accordance with QW-199.1.


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QW-252 OFW

QW-252.1 OFW (special process)

QW-253 SMAW

QW-258 ESW

QW-258.1 ESW (special process)

QW-259 EGW- . spec a

process)

QW-254 SAW

QW-254.1 SAW (special process)

- . spec a process

QW-260 EBW

QW-261 Stud Welding

W-262 Inertia and ContinuousQW-255 GMAW and FCAW

QW-255.1 GMAW and FCAW(special process)

W-256 GTAW

Drive Friction Welding

QW-263 Resistance WeldingQW-264 LBW

QW-255.1 GTAW (special process)

QW-257 PAW

- .

QW-265 Flash Welding

QW-290.4 Temper Bead

- .


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