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API RP 577:2004 pdf download

API RP 577:2004 pdf download.Welding Inspection and Metallurgy.
The PQR should accompany the WPS and be available for review by the Inspector upon request. It does not need to be available to the welder. One PQR may support several WPSs. One WPS may be qualified by more than one PQR within the limitations of the code.
Inspectors shall review the WI’S and PQR to verify they arc acceptable for the welding to be done. While there are many ways to review a welding procedure. the most elleetive one utilizes a systematic approach that assures a complete and thorough review of the WPS and PQR to verify that all Section IX and construction and repair COCIC requirements have been satisfied.
The initial step is to verify the WI’S has beeii properly completed and addresses the requirements of Section IX and the constructlore repair code. The second step is to verify the PQR has been properly completed and addresses all the requirements of Section IX and the construction and repair code. The third step is to confirm the PQR essernial variable values properly support the range specified in the WI’S.
For simplicity purposes, the following list is for a single weld process on the WI’S when notch toughness is not a requirement (so supplementary essential variables do not apply):
6.4.1 Items to be Included in the WPS
a. Name of the company using the procedure.
b. Name of the individual that prepared the procedure.
c. Unique number or designation that will distinguish it from any others, and date.
d. Supporting PQR(s).
e. CunEcnt revision and date, if revised.
£ Applicable welding process (i.e.. SMAW. CTAW. GMAW. FCAW. SAW).
g. Type of welding process (i.e.. automatic, manual, machine, or scm i-automatic).
h. Joint design information applicable to the process (i.e. type of joint, groove angle. root spacing, root face dimensions, backing material and function).
I. Base metal’s P-number and group number of the metals being joined, or specification type and grade, or chemical analysis and mechanical properties.
j. Thickness range the procedure is to cover.
k. Diameter (for piping) the procedure is to coscr.
I. Filler metal specification (SFA number).
m. AWS classification number.
n. F-number (see QW-432).
o. A-number (see QW-442).
p. Filler metal size.
q. Deposited metal thickness.
r. Electrode-flux class and trade name. if used.
s. Consumable insert, if used.
t. Position and progression qualified for use in production welding.
u. Minimum preheat temperature (including preheat maintenance requirements) and maximum interpass temperature the weldment is to receive throughout welding.
v. Post-weld heat treatment temperature and hold time (if applied).
w. Type. composition. and flow rates for shielding, trailing. and backing gases (if used).
x. Current. polarity, amperage range, and voltage range for production welding (for each electrode size, position, and thickness. etc.).
y. Tungsten electrode size and type (if GTAW).
z. Metal transfer mode (if CIMAW or FCAW).
an. Technique including string or weave bead. initial and inter- pass cleaning, peening. passes greater than 112 in. (12.7 mm) thickness, and other weld process specific nonessential variables.
6.4.2 Items to be Included in the PQR
a. Name of the company using the procedure.
b. Unique number or designation and the date.
c. WPS(s) that the PQR supports.
d. Welding process used.
e. Type of weld for qualification (groove, fillet, other).
f Test coupon thickness,
g. Test coupon diameter.
h. P-numbers of coupon welded.
i. Filler metal F-number.
j. Filler metal A-number.
k. Position and progression.
I. ibtal weld metal thickness deposited.
m. Any single weld pass thickness greater than 1/2 in.
(12.7 mm).
n. Preheat temperature.
o. PWIIT temperatLire and thickness limit.
p. Gas,
q. Electrical Characteristics.
r. Technique.
s. Proper number, size, and test results for tensile tests.
t. Proper number, type, and results for bend tests.
u. Additional test results if required by construction code or
prolcct specification.
v. Certification signature and date.
w. Welder’s Name.
x. Tests Conducted by & Record number.
The review should confinn that the PQR variables adequately represent and support the range specified in the WPS for the production application. While this example serves to illustrate a suggested approach to reviewing welding procedures.


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