WELDING PROCEDURE SPECIFICATION (WPS)
Clause 5 — Prequalified — AWS D1.1:2020
WPS Number
WIQ-FCAW-71T1C-G2-DV-001
Title
FCAW-G E71T-1C (CO₂) — CJP Double-V 60° (Backgouge) — Group II — All Position
JOINT DESIGN
Code Reference
Figure 5.1 — B-U3-GF
Backing
none — N/A — backgouge to sound metal
DESIGNATION: B-U3-GF
| DIMENSION | AS DETAILED | AS FIT-UP TOLERANCE | NOTES |
|---|
| Groove Angle (α) | 60° | +10°, −0° | Both sides |
| Root Opening (R) | 1/4 in | +1/16 in, −0 | — |
| Root Face (f) | 0 to 1/8 in | Not limited | — |
| Base Metal Thickness (T) | Unlimited | — | Double-V for thick sections |
BASE METAL
Specifications
A36 (all thk), A53 Gr B, A500 Gr B/C, A501, A516 Gr 65/70, A529 Gr 50/55, A572 Gr 42, A572 Gr 50, A572 Gr 55, A588, A709 Gr 36, A709 Gr 50, A709 Gr 50S, A709 Gr 50W, A709 HPS50W, A710 Gr A, A913 Gr 50, A992, A1011 HSLAS Gr 50, A1018, A1085, API 5L X52, API 5L X60, API 5L X65, ABS Gr A/B/D/E
Thickness Range
1/2 in to unlimited
POSITION
Qualified Positions
1G, 2G, 3G, 4G
Vertical Progression
uphill
PREHEAT & INTERPASS TEMPERATURE
Minimum Preheat
32°F (≤3/4 in) / 50°F (>3/4–1-1/2 in) / 150°F (>1-1/2–2-1/2 in) / 300°F (>2-1/2 in)
Code Reference
Table 5.8, Category B
APPROVED FILLER METAL SIZES
Welder may use any size listed below. Each size has its own amperage/voltage range and position limit per Table 5.1.
| Size | Class | Amps | Volts | Position Limit | Notes |
|---|
| 0.035 in | E71T-1C | 130-210 | 24-28 | All | Any pass |
| 0.045 in | E71T-1C | 150-300 | 24-30 | All | Any pass |
| 0.052 in | E71T-1C | 175-350 | 25-31 | All (reduced WFS for V/OH) | Any pass |
| 1/16 in | E71T-1C | 200-400 | 26-33 | F/H only | Any pass |
WELDING PARAMETERS
| Pass | Process | Filler / Class | Size | Current | Amps | Volts | Speed | Technique |
|---|
| Root (1st side) | FCAW-G | E71T-1C | 0.035 in | DCEP | 130-210 | 24-28 | 8-16 in/min | either / uphill |
| Root (1st side) | FCAW-G | E71T-1C | 0.045 in | DCEP | 150-300 | 24-30 | 8-16 in/min | either / uphill |
| Root (1st side) | FCAW-G | E71T-1C | 0.052 in | DCEP | 175-350 | 25-31 | 8-16 in/min | either / uphill |
| Root (1st side) | FCAW-G | E71T-1C | 1/16 in | DCEP | 200-400 | 26-33 | 8-16 in/min | either / uphill |
| Fill (1st side) | FCAW-G | E71T-1C | 0.035 in | DCEP | 130-210 | 24-28 | 8-16 in/min | either / uphill |
| Fill (1st side) | FCAW-G | E71T-1C | 0.045 in | DCEP | 150-300 | 24-30 | 8-16 in/min | either / uphill |
| Fill (1st side) | FCAW-G | E71T-1C | 0.052 in | DCEP | 175-350 | 25-31 | 8-16 in/min | either / uphill |
| Fill (1st side) | FCAW-G | E71T-1C | 1/16 in | DCEP | 200-400 | 26-33 | 8-16 in/min | either / uphill |
| Backgouge + Root (2nd side) | FCAW-G | E71T-1C | 0.035 in | DCEP | 130-210 | 24-28 | 8-16 in/min | either / uphill |
| Backgouge + Root (2nd side) | FCAW-G | E71T-1C | 0.045 in | DCEP | 150-300 | 24-30 | 8-16 in/min | either / uphill |
| Backgouge + Root (2nd side) | FCAW-G | E71T-1C | 0.052 in | DCEP | 175-350 | 25-31 | 8-16 in/min | either / uphill |
| Backgouge + Root (2nd side) | FCAW-G | E71T-1C | 1/16 in | DCEP | 200-400 | 26-33 | 8-16 in/min | either / uphill |
| Fill (2nd side) | FCAW-G | E71T-1C | 0.035 in | DCEP | 130-210 | 24-28 | 8-16 in/min | either / uphill |
| Fill (2nd side) | FCAW-G | E71T-1C | 0.045 in | DCEP | 150-300 | 24-30 | 8-16 in/min | either / uphill |
| Fill (2nd side) | FCAW-G | E71T-1C | 0.052 in | DCEP | 175-350 | 25-31 | 8-16 in/min | either / uphill |
| Fill (2nd side) | FCAW-G | E71T-1C | 1/16 in | DCEP | 200-400 | 26-33 | 8-16 in/min | either / uphill |
| Cap | FCAW-G | E71T-1C | 0.035 in | DCEP | 130-210 | 24-28 | 8-16 in/min | either / uphill |
| Cap | FCAW-G | E71T-1C | 0.045 in | DCEP | 150-300 | 24-30 | 8-16 in/min | either / uphill |
| Cap | FCAW-G | E71T-1C | 0.052 in | DCEP | 175-350 | 25-31 | 8-16 in/min | either / uphill |
| Cap | FCAW-G | E71T-1C | 1/16 in | DCEP | 200-400 | 26-33 | 8-16 in/min | either / uphill |
PREQUALIFIED VARIABLE TOLERANCES (TABLE 5.2)
| VARIABLE | TOLERANCE | NOTES |
|---|
| Amperage (Current) | ± 10% | From values specified on WPS |
| Voltage | ± 15% | From values specified on WPS |
| Travel Speed | ± 25% | From values specified on WPS |
| Wire Feed Speed | ± 10% | GMAW, FCAW, SAW only |
TABLE 5.1 ADDITIONAL LIMITS
•Pass width at surface ≥ pass depth (width/depth rule)
•Vertical progression: uphill (except undercut repair with ≥70°F preheat)
•Power source: Constant Voltage (CV) required
TECHNIQUE
Cleaning
Backgouge to sound metal. Wire brush/grind. Remove all slag and spatter.
FIELD TIPS — WeldIQ
▸Maintain consistent stickout (5/8 to 1 in). Too long = excess spatter. Too short = burnback.
▸Check gas flow before welding — flowmeter should read 35-50 CFH. Draft/wind will blow gas away; use windscreens in field.
▸100% CO2: more penetration but more spatter than mixed gas. Good for thicker sections and field work.
▸Open root: fit-up is EVERYTHING. Consistent root opening = consistent penetration. Check gap at least every 12 inches.
▸Use bridge tacks or tack from inside when possible. Tacks in the groove must be ground to feather edge before root pass.
▸Verify preheat with a temperature-indicating crayon (Tempilstik) or contact pyrometer. Check 3 inches from the weld on both sides.
CODE CITATIONS
D1.1:2020 Clause 5.2 · Table 5.3 Group II · Figure 5.1 B-U3-GF · Table 5.4 (E71T-1C) · Table 5.8 Cat B
Generated by WeldIQ™ · AWS D1.1:2020 · Prequalified per Clause 5 — Prequalified