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PQR Tips

1. This document is a Welding Procedure Qualification Record (PQR) that was prepared in accordance with Section IX of the ASME Boiler and Pressure Vessel Code (BPVC) by Larsen & Toubro Limited for welding procedures. 2. The PQR provides details of the welding process, base metals, filler metals, joint design, preheat and post weld heat treatment temperatures, welding positions, parameters, and results of mechanical tests including tensile, bend, toughness, and fillet weld tests. 3. The PQR indicates that the welding procedure was qualified by preparing and testing welds in accordance with the requirements of Section IX of the ASME BPVC and certifies

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Waqas Waqas
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438 views4 pages

PQR Tips

1. This document is a Welding Procedure Qualification Record (PQR) that was prepared in accordance with Section IX of the ASME Boiler and Pressure Vessel Code (BPVC) by Larsen & Toubro Limited for welding procedures. 2. The PQR provides details of the welding process, base metals, filler metals, joint design, preheat and post weld heat treatment temperatures, welding positions, parameters, and results of mechanical tests including tensile, bend, toughness, and fillet weld tests. 3. The PQR indicates that the welding procedure was qualified by preparing and testing welds in accordance with the requirements of Section IX of the ASME BPVC and certifies

Uploaded by

Waqas Waqas
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
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WELDING PROCEDURE QUALIFICATION RECORD

(PQR) (QW-483)
In accordance with QW-200.2, Section IX, ASME BPVC
Company Name
PQR No.
WPS No.
Welding Process
Date of Welding
JOINTS (QW-402)
Joint Design
Root gap / Space
Root land
Backing
Backing Material
Retainer
Bevel Angle
BASE METALS (QW-403)
Material Specification
Grade

Larsen & Toubro Limited, Valve Manufacturing Unit, Coimbatore.


Date
Date
Type
Weld Shop

PREHEAT (QW-406)
Preheat temperature
Interpass temperature
Preheat Maintenance
.
P.No
to P.No
8 Gr. No.
1
0 Gr. No.
1 POST WELD HEAT TREATMENT (QW-407)
Thickness of test coupon
Temperature
Diameter of test coupon
Time
Size (l x w x t) (mm)
Cooling
Weld pass thickness
Rate of Heating
Rate of Cooling
Refer MTC enclosed for plates bearing Heat No 2N020 Plates of 40
mm used for qualification.
Loading / Unloading Temperature (max.)
FILLER METALS (QW-404)
SFA Specification
AWS Classification
Filler Metal F-No.
Weld Metal Analysis A-No.
Filler Metal Product Form
Size of Filler metal
Weld metal thickness
Refer Test Certificate. Batch No. C10074641 & C05072705 of D&H

GAS (QW-408)
Gas

Mixture composition(%

Shielding Gas
Trailing Gas
Welding Grade (no mix
Backing Gas
0
ELECTRICAL CHARACTERISTICS (QW-409)
Current (AC or DC)
Polarity
Amps (A)

POSITION (QW-405)

Root Passes

Position

Other Passes

Weld Progression

.
TECHNIQUE (QW-410)
Travel Speed
String or Weave Bead
Initial and interpass cleaning
Method of back gouging
Oscillation
Multiple or single pass (per side)
Multiple or single layer
Multiple or single electrode
Electrode spacing
Welding Process
Peening
Use of thermal process

Form No: QP-051-R0

Tungsten Electrode size


Other Heat Input

WELDING PROCEDURE QUALIFICATION RECORD


(PQR) (QW-483)
In accordance with QW-200.2, Section IX, ASME BPVC
TENSILE TEST (QW-150)
Specimen No.

Width, mm

Thickness, mm

Ultimate total load,


kN

Area, mm2

Ultimate unit stress, MPa

GUIDED-BEND TESTS (QW-160)


Specimen Size (l x w x t) (mm)
Specimen

Type and Figure No.

300 x 40 x 10.0
Bend Angle

Diameter of roller (mm)

TOUGHNESS TESTS (QW-170)


Specimen Size
Notch Location /
Orientation

Specimen No.

Test Temperature

Impact Values, Joules ( for ref only )

Average

Lateral expansion, mm

FILLET-WELD TESTS (QW-180)


Results
Penetration into parent metal
Macro - Results
OTHER TESTS
Sl. No
1
2
3

Type of Examination
Visual Examination
Liquid Penetrant
Examination

Results of Examination

Radiographic Examination
Hardness (HV10)

Acceptance Standard /
Requirement
QW-302.4

Base

As per NACE MR0175/


ISO 15156-2
248 HV / 237 HB max

Weld

248 HV / 237 HB max

HAZ

248 HV / 237 HB max

Macro Examination

Average
Average
(weld top surface)
Average

Shall be free from defects

Welder's Name
Identification No.
Test Conducted by
We certify that the statements in this record are correct and that the test welds were prepared, welded, and tested in accordance with
Section IX of the ASME Boiler and Pressure Vessel Code.

Prepared By

Reviewed & Approved By

Velusamy P
L&T Valves, Quality Assurance

C.Raja
L&T Valves, Quality Assurance

Form No: QP-051-R0

CORD

PQR

BPVC

re.
e
e

W-407)

x.)

Mixture composition(%)

Flow Rate
(lpm)

elding Grade (no mixture)


0

0
0

QW-409)

Amps (A)

Volts (V)

Heat Input,
kJ/mm.

Form No: QP-051-R0

CORD

PQR

BPVC

imate unit stress, MPa

r of roller (mm)

Lateral expansion, mm

Type of failure &


location

Result

Remarks

ults of Examination

sted in accordance with the requirements of

wed & Approved By

C.Raja
es, Quality Assurance
Form No: QP-051-R0

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