4 Asme Sec Ix Wps Pqr Slide 36 to 70

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

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A Weld: a localized coalescence of metals or

nonmetals roduced either b heatin the

materials to the welding temperature, with

or without the application of pressure, or

by the appl cat on o pressure alone andwith or without the use of filler material.

A Joint: A junction of members or the edge of

members which are to be ointed or havebeen joined



tee joint (T): a joint between two members located

approximately at right angles to each other

butt joint: a joint between two members aligned

.

approx ma e y n e same p ane.

approximately at right angles to each other

in the form of an L.

lap joint: a joint between two overlapping

members in arallel lanes.

Lap joint:



Butt joints:

T joints:

La oints:

Closed

corner

Open

corner

Corner joints:



Butt welds:

Fillet welds:

S ot/Seam welds:

Plug/Slot welds:

Edge welds:



Single bevel

Single J

Single U



Double bevel

Double J

Double U



A fillet welded butt joint

A compound welded butt joint



A butt welded T joint

A compound welded T joint



backing: a material placed at the root of a weld joint

for the purpose of supporting molten weldme a so as o ac a e comp e e o n

penetration. The material may or may not

. .

nonmetallic, which is used to contain or

shape molten weld metal. See also backing.



Groove angle

oo spac ng.

T

Backing


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QW – 253

WELDING VARIABLES PROCEDURE SPECIFICATIONS (WPS)-

Paragraph Brief of Variables Essential

Supplementary

Essential Nonessential

.1 ∅ Groove design ×

QW-402Joints

.4 − Backing ×

.10 ∅ Root spacing ×

.11 ± Retainers ×

Legend:

+ Addition > Increase/greater than ↑ Uphill ← Forehand ∅ Change

- Deletion < Decrease/less than ↓ Downhill → Backhand


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QW-402.1 A change in the type of groove (Vee-

groove, U-groove, single-bevel, double-bevel, etc.).QW-402.4 The deletion of the backing in single-

welded groove welds. Double-welded groove welds are

cons ere we ng w t ac ng.QW-402.10 A change in the specified root spacing.

QW-402.11 The addition or deletion of nonmetallic

retainers or nonfusing metal retainers.


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Question: If a WPS states that the GTAW process

shall be used on root and second ass of o en root ormetal backed groove joints and the SMAW process

shall be used on the remainder of the roove oint is

it necessary to state that the SMAW portion of theWPS must be erformed with backin i.e. the

GTAW process)?

ep y: o.


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Base metal: the metal or allo that is welded brazed or

cut.

Pass: a single progression of a welding or surfacing

operation along a joint, weld deposit, or

substrate. The result of a pass is a weld bead

or layer.




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QW – 253

WELDING VARIABLES PROCEDURE SPECIFICATIONS (WPS)Shield Metal-Arc SMAW

Paragraph Brief of Variables Essential

Supplementary

Essential Nonessential

.5 ∅ Group Number

QW-403

Base

Metals

.6 T Limit impact

.7 T/t Limits > 8 in. (200 mm) ×

.8 ∅ T Qualified

.9 t Pass > ½ in. 13 mm

.11 ∅ P-No. qualified

.13 ∅ P-No. 5/9/10 ×

Le end:

+ Addition > Increase/greater than ↑ Uphill ← Forehand ∅ Change

- Deletion < Decrease/less than ↓ Downhill → Backhand


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QW-403.11 Base metals specified in the WPS shall be

qualified by a procedure qualification test which wasmade using base metals in accordance with QW-424.


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QW-424.1 Base metals are assigned P-Number in

table QW/QB-422; metals that do not appear in tableQW/QB- 422 are considered to be unassigned metals

except as otherwise defined for base metals having the

.

identified in the WPS and on the PQR by specification,

t e and rade or b chemical anal sis and mechanical

properties. The minimum tensile strength shall be de-

fined by the organization which specified the unassignedmetal if the tensile strength of that metal is not defined by

the material specification.


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ase e a s se or

Procedure Qualification CouponBase Metals Qualified

One metal from a P-Number to any metal from the

same P- Number

Any metals assigned that P-Number

One metal from a P-Number to any metal from any

other P- Number

Any metal assigned the first P- Number to any metal assigned the second P-

Number

One metal from P-No. 3 to any metal from P-No. 3 Any P- No.3 metal to any metal from P- or P- No.3 or 1

ne meta rom - o. to any meta rom - o. ny - o. meta to any meta rom - os. , , or

One metal from P-No. 5A to any metal from P-No. 5A Any P-No. 5A metal to any inew from P-Nos. 5A, 4, 3, or 1

One metal from P-No. 5A to a metal from P-No. 4, or P-

No. 3, or P-No. 1

Any P-No. 5A metal to any metal assigned to P-No. 4, 3, or 1

One metal from P-No. 4 to a metal from P-No. 3 or P- No. 1 Any P- No. 4 metal to any metal assigned to P-No. 3 or 1

Any unassigned metal to the same unassigned metal The unassigned metal to itself

Any unassigned metal to any P- Number metal The unassigned metal to any metal assigned to the same P- Number as thequalified metal

Any unassigned metal to any other unassigned metal The first unassigned metal to the second unassigned metal


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QW/QB-422 FERROUS P-NUMBERS AND S-NUMBERS

Grouping of Base Metals for Qualification

Spec.No.

Type or Grade UNS No.

MinimumSpecified

Tensile, ksiP-

No.Group

No.S-

No.Group

No.P-

No.S-

No.Nominal

CompositionProduct

Form

SA-36 … K02600 58 1 1 … … 101 … C-Mn-Si Plate, bar, & shape

SA-53 Type S, GR. B K03005 60 1 1 … … 101 … C-Mn Smls pipe

SA-105 … K03504 70 1 2 … … 101 … C-Si Flanges & Fitting

SA-106 B K03006 60 1 1 … … 101 … C-Si Smls pipe

SA-516 70 K02700 70 1 2 … … 101 … C-Mn.Si Plate

SA-240 T e 304 S30400 75 8 1 … … 102 … 18Cr-8Ni Plate, sheet, & stri

API 5L B … 60 … … 1 1 … 101 C-Mn Smls. & welded pipe & tubes

and so on


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QW-403.8 A change in base metal thickness beyond

the range qualified in QW-451, except as otherwise permitted by QW-202.4(b).


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QW-403.9 For single-pass or multipass welding in

which any pass is greater than. 1/2 in. (13 mm) thick,an increase in base metal thickness beyond 1.1 times

that of the qualification test coupon.


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QW-403.7 For the multipass processes of shielded

metal-are, submerged-arc, gas tungsten-are, and gasmetal-arc, the maximum thickness qualified for 1 1/2 in.

(38 mm) and over thickness T of the test coupon of QW-

. .

QW-451.1. For thicknesses greater than 8 in. (200 mm),

the maximum thicknesses of base metal and

deposited weld metal qualified is 1.33T or l.33t , as

applicable.


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QW-403.5 Welding procedure qualifications shall be made using:

(a) The same base metal (including type and grade) to be used in production welding; or

(b) For ferrous material, a base metal listed in the same P-Number and Group Number (seeQW/QB-422) as the base metal to be used in production welding; or

(c) For nonferrous material, a base metal listed in the same P-Number and Group Number(see QW/QB-422) as the base metal to be used in production welding.

For ferrous material in QW/QB-422, a procedure qualification shall be made for each P- Number and Group Number combination of base metals, even though procedure qualification tests

- . 422, a procedure qualification shall be made for each P-Number and Group Number combination

of base metals, even though procedure qualification tests have been made for each of the two base metals welded to itself. If, however the procedure specification for welding the combinationof base metals specifies the same essential variables, including electrode or filler metal, as both

, , ,the procedure specification for welding the combination of base metals is also qualified. Inaddition, when base metals of two different P-Number Group Number combinations are qualified using a single test coupon, that coupon qualifies the welding of those two P-Number Group

Numbers to themselves as well as to each other using the variables qualified.

- by other Sections.


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QW-403.6 The minimum base metal thickness quali-

fied is the thickness of the test coupon T or 5/8 in.(16 mm), whichever is less. However, where T is less

than 1/4 in. (6 mm), the minimum thickness qualified

.

qualified with a PWHT above the upper transformation

tem erature or when an austenitic material is solution

annealed after welding.


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Question (1): A test coupon is prepared as follows: A

1.75 in. plate is welded to 1.75 in. plate with 1 in. thickweld. Per QW-451.l, is 8 in. the maximum thickness

range of base metal qualified?

Reply (1): Yes, except that further limits or exceptions

may app y as s a e n o es an o - . .


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Question (1): A 50 mm thick test plate done for a weld

procedure by FCAW is welded full thickness andreceives X-ray examination and mechanical tests,

including impact tests. Is the thickness test range

. . - .

ep y : es, excep w en no c oug ness s a

requirement the minimum thickness qualified is 5/8 in.


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Background: A WPS is supported by three PQRs. Two

PQRs are recorded on 12mm and 28.5mm thick couponsusing tensile, bend, and impact testing specimens. A third

PQR was made using 5mm thick plate using the same

,

tested.

WPS for welding 2.5 mm through 57 mm material

re uirin notch tou hness testin ? Reply (1): No.


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Background: A WPS is supported by three PQRs. Two

PQRs are recorded on 12mm and 28.5mm thick couponsusing tensile, bend, and impact testing specimens. A third

PQR was made using 5mm thick plate using the same

,

tested.

support welding base metal thicknesses of 4.8 mm

throu h 57 mm with or without notch tou hness? Reply (2): Yes.


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Question (1): Do the provisions of QW-200.4(b) permit a

GTAW procedure qualification test weldment performedon a 13 mm thick coupon to support depositing a root

pass in a production joint of the qualified base metal

required?

- . . ..


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4 Asme Sec Ix Wps Pqr Slide 36 to 70

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