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NATCO


Welding Procedure Specification No. ______________________Date ___________________________By ______________________________________
Revision No. _________________________________________ Date __________________________ Supporting PQR No.(s) ______________________
Supercedes ___________________________________________Date __________________________ By _______________________________________
Welding Process(es) _________________________________ Type(s) __________________________________________________
                                                                                                                                               (Automatic, Machine, Manual, or Semi-Auto)

JOINTS (QW-402)                                                                                                                                       Details
Joint Deisgn ____________________________________________________
_______________________________________________________________
_______________________________________________________________
Backing (Yes) _______________________ (No) ________________________
Backing Material (Type) ____________________________________________
Retainer(s) _______________________________________________________

      __Metal                __Nonfusing Metal
      __Nonmetallic      __Other

Sketches, Production Drawings, Weld Symbols, or Written Description
should show the general arrangement of the parts to be welded. Where
applicable, the root spacing and the details of weld groove may be
specified.

(At the option of the Mfgr., sketches may be attatched to illustrate joint
design, weld layers, and bead sequence, eg. for notch toughness procedures,
for multiple process procedures, ect)

*BASE METALS (QW-403)

P-No. ______________Group No. __________________ to P-No. __________________ Group No. __________________

                        OR

Specification type and grade _____________________________________________________________________________
to specification type and grade ___________________________________________________________________________

                        OR

    Chem. Analysis and Mech. Prop. __________________________________________________________________________
    to Chem. Analysis and Mech. Prop. ________________________________________________________________________
    Thicknesses Range:
    Base Metal:                       Groove __________________________________________ Filet __________________________
    Deposited Weld Metal:        Groove _________________________________________Filet __________________________
    Pipe Dia. Range:                Groove __________________________________________ Filet __________________________
    Maximum deposited weld metal (per pass) __________________________________________________________________

*FILLERMETALS (QW-404)           GMAW                           SMAW


F-No. ________________________________________________________________ Other _________________________
A-No. ________________________________________________________________ Other _________________________
Spec. No. (SFA)_______________________________________________________________________________________
AWS No. (Class) _____________________________________________________________________________________
Size of filler metals ____________________________________________________________________________________
                                                            (Electrode, Cold Wire, Hot Wire, ect)
Electrode-Flux (Class) _________________________________________________________________________________
Flux Trade Name ______________________________________________________________________________________
Consumable Insert _____________________________________________________________________________________
Other _______________________________________________________________________________________________
         _________________________________________________________________________________________________

* Each base metal-filler combination should be recorded individually

                                                                                                            WPS No. ________________________ Rev.______________

POSITION(S) QW-405
    Position(s) of Groove _________________________________
    Welding Progression: Up ____________ Down_____________
    Position(s) of Filet ____________________________________

POSTWELD HEAT TREATMENT (QW-407)
    Temperature Range _____________________________
    Time Range ___________________________________

PREHEAT (QW-406)
    Preheat Temp. Min. ___________________________________
    Interpass Temp. Max. _________________________________
    Preheat Maintenance __________________________________
    (Continuous or special heating where applicable should be recorded)

GAS (QW-408)
    Shielding Gas(es) ______________________________
    Percent Composition (mixtures) __________________
    Flow Rate _____________________________________
    Gas Backing ___________________________________
    Trailing Shielding Gas Composition ________________

ELECTRICAL CHARACTERISTICS (AW-409)
    Current AC or DC _________________ Polarity __________________________                  MAXIMUM HEAT INPUT:
    Amps (Range) ___________________ Volts (Range) _______________________                GMAW: __________________
    (Amps and volts range should be recorded for each for each electrode size,                             SMAW: _________________
    position, and thicknesses, ect. This information may be listed in a tabluar
    form simular to that shown below.)

    Pulsing current ________________________________________________________________________________________
    Tungsten Electrode Size and Type _________________________________________________________________________
                                                                                    (Pure Tungsten 2% Thoriated, etc.)
    Mode of Metal Transfer _________________________________________________________________________________
                                                                                    (Spray arc, short circuting arc, etc.)
    Electrode Wire feed speed range __________________________________________________________________________

TECHNIQUE (QW-410)
    String or Weave Bead ___________________________________________________________________________________
    Orifice or Gas Cup Size _________________________________________________________________________________
    Initial and Interpass Cleaning (Brushing, Grinding, ect.) _______________________________________________________
    Method of Back Gouging ________________________________________________________________________________
    Oscillation ____________________________________________________________________________________________
    Contact Tube to Work Distance ___________________________________________________________________________
    Multiple or Single Pass (per side)                       GMAW: ____________________                       SMAW: _______________
    Multiple or Single Electrodes _____________________________________________________________________________
    Travel Speed (Range) ___________________________________________________________________________________
    Peening ______________________________________________________________________________________________
    Other ________________________________________________________________________________________________
             __________________________________________________________________________________________________
             __________________________________________________________________________________________________

Weld Layer(s)



Process

Filler Metal

Current

Volt.
Range

Travel Speed
Range
ipm

Class

Diameter
mm (in.)

Type
Polarity

Amp.
Range


Root pass
only


All


GMAW
GMAW
GMAW

SMAW
SMAW
SMAW
SMAW
SMAW


ER70S-2
ER70S-2
ER70S-2

E7018-1
E7018-1
E7018-1
E7018-1
E7018-1


0.7(0.030)
0.9(0.035)
1.2(0.045)

2.4(3/32)
3.2(1/8)
4.0(5/32)
5.0(3/16)
6.4(1/4)


DCRP
DCRP
DCRP

DCRP
DCRP
DCRP
DCRP
DCRP


70-130
85-200
115-250

60-110
80-160
100-210
160-280
200-350


14-21
15-22
16-23

0.7-12
1.0-14
1.3-16
2.3-20
2.9-20


1.6-14
2.1-16
3.0-18

0.7-12
1.0-14
1.3-16
2.3-20
2.9-20

     Note: Welding parameters shall be adjusted to insure that the maximum heat input value specified in QW-409 above is not exceeded.