WELDING PROCEDURE SPECIFICATION (WPS)
Company Name:
SINOPEC
By: Siraj Kote
WPS. No. WPS-SN-LTCS-02 Revision No. 01
Date: 4-Mar-2020
Supporting PQR No.(s): PQR-FGP-LTCS-07
Date: 28-Feb-2019
Welding Process(es)
GTAW + SMAW
Type
MANUAL
CODE: ASME IX √ API 1104 ASME31.3√ AWS D1.1 Other: SES-W01-F10 √
BASE METALS(QW-403)
P-No. 1 Group No.
1&2 to P-No. 1 Group No
1&2
Specification type and grade A333 GR 6, A420 GR WPL6, A420 GR WPL6S, A350 GR LF2 or
Equivalent
To Specification type and grade A333 GR 6, A420 GR WPL6, A420 GR WPL6S, A350 GR LF2
or Equivalent
Chem. Analysis and Mech. Prop. As per specification
To Chem. Analysis and Mech. Prop. As per specification
Base Metal:
Groove 16mm to 64mm Fillet All base metal thickness
Deposited Weld Metal
GTAW Max. 7 mm, SMAW Remaining upto Max. 57 mm
Pipe Dia. Range: Groove 1/2 inch & Above
Fillet All diameters
Other This WPS apply to the weld joint that impact test of weld is required.
JOINTS(QW-402)
Joint Design : Butt Joint，Single V Groove ,Branch & Fillet Welds
Backing: GTAW: No SMAW: Yes Type GTAW weld metal for SMAW
Details: See Attachment Joint No. A1/A2/A3/B1/B3/B4/B5/C1/C2
FILLER METALS(QW-404)
PROCESS:. ………….
F-No. ………………...
A-No………………….
Spec. No.(SFA)………
AWS. No.(Class)……..
Size of filler metals…..
Electrode-Flux (Class).
Flux Trade Name…….
Consumable Insert…...
Other ………………...
PREPARED BY SEG
Name:
Siraj Kote
Signature
Date
4-Mar-2020
GTAW
SMAW
6
4
10
10
5.28
5.5
ER80S-Ni1
E8018-C3
φ2.0 or φ2.4
φ2.5, φ3.2, φ4
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
REVIEWED BY SEG
Name:
Tong Yongguang
Signature
Date
4-Mar-2020
APPROVED BY PMT
Name:
Signature
Date
WELDING PROCEDURE SPECIFICATION (WPS)
WPS No.
POSITIONS(QW-405)
Position of Groove
All
Welding Progression Up √ Down
Position of Fillet All position
WPS-SN-LTCS-02
Rev.
01
POSTWELD HEAT TREATMENT(QW-407)
Temperature Range
595~650℃
Time Range 1Hr. × T(inch) , and Min. 1 Hr. and 20 Min.
Heating/Cooling Rate:
≤222℃/Hr.÷T(inch), and Max.222℃/Hr
* T (inch) means the pipe wall thickness in inches.
PREHEAT(QW-406)
Preheat Temp.(min.) 10℃ (AMBIENT)
Interpass Temp.(max.) 275℃ max
Preheat Maintenance N/A
Method of Temp. Measurement: Infrared
Thermometer or Digital Thermometer
Other: When thickness of the base metal is
above 25mm, preheat temp. shall be 95℃ min.
GASES(QW-408)
Percent
Composition
(Mixtures)
Gas
Flow Rate
Shielding
Argon
99.99%
20-40 CFH
Trailing
N/A
N/A
N/A
Backing
N/A
N/A
N/A
TECHNIQUE(QW-410)
String or Weave Bead String &Weave
Max.Weave Width 3×Core wire Ø
Orifice or Gas Cup Size φ4mm -φ12mm
Initial and Interpass Cleaning (Brushing, Grinding, etc.) Power grinder, brushing or chipping
as required
Method of Back Gouging
N/A
Oscillation
N/A
Contact Tube to Work Distance
N/A
Multiple or Single Pass(per side) Multiple Pass
Multiple or Single Electrodes
Single Electrode
Travel Speed(Range)
See table below
Peening
NOT PERMITTED
Other Wind velocity in the welding area for GTAW shall not exceed 8Kph(2.2m/s)
ELECTRICAL CHARACTERISTICS(QW-409)
Current(AC or DC)
DC
Polarity
EN / EP
Amps(Range) See Table Below
Volts(Range)
See Table Below
Tungsten Electrode Size and Type
3/32” or 1/8”, Tungsten 2% Thoriated
Mode of Metal Transfer for GMAW N/A
Electrode Wire Feed Speed Range
N/A
Filler Metal
Weld
Layer
Process
Root
Current
Type
Volt
(V)
Travel
Speed
Range
(mm/min)
Input(K
Heat
Classification
Diameter
(mm)
Polarity
Amp
(A)
GTAW
ER80S-Ni1
φ2.0 orφ2.4
DCEN
120-180
10-12
50-90
2.592
Hot
GTAW
ER80S-Ni1
φ2.0 orφ2.4
DCEN
175-185
11-12
65-85
2.05
Fill
SMAW
E8018-C3
φ3.2/φ4
DCEP
120-145
20-27
90-130
2.61
Cap
SMAW
E8018-C3
φ3.2/φ4
DCEP
110-140
25-30
90-140
2.8
J/mm)