WELDING PROCEDURE SPECIFICATION (WPS)
Clause 5 — Prequalified — AWS D1.1:2020
WPS Number
WIQ-GMAW-70S6-PU-G1-6G-001
Title
GMAW ER70S-6 (Pulse) — CJP V-Groove 60° — Group I — 6G Pipe 45°
JOINT DESIGN
Code Reference
Figure 5.1 — B-U2-GF (pipe)
DESIGNATION: B-U2-GF (pipe 6G)
| DIMENSION | AS DETAILED | AS FIT-UP TOLERANCE | NOTES |
|---|
| Groove Angle (α) | 60° | +10°, −5° | — |
| Root Opening (R) | 3/16 in | +1/16 in, −0 | Wider root for wire feed root |
| Root Face (f) | 0 to 1/16 in | Not limited | — |
| Pipe Diameter | ≥ 4 in OD | — | — |
BASE METAL
Specifications
A36 (≤3/4 in), A53 Gr B, A500 Gr B, A500 Gr C, A501 Gr A, A516 Gr 55, A516 Gr 60, A516 Gr 65, A516 Gr 70, A524 Gr I/II, API 5L Gr B, API 5L X42
Thickness Range
Schedule 40+ (wall 3/16 to 3/4 in)
POSITION
Vertical Progression
uphill
PREHEAT & INTERPASS TEMPERATURE
Minimum Preheat
32°F (≤3/4 in)
Code Reference
Table 5.8, Category B
SHIELDING
Gas Type
75% Ar / 25% CO2 or 90/10
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 | ER70S-6 | 120-280 | 22-30 | All | Pulse transfer |
| 0.045 in | ER70S-6 | 150-350 | 23-32 | All | Pulse transfer |
WELDING PARAMETERS
| Pass | Process | Filler / Class | Size | Current | Amps | Volts | Speed | Technique |
|---|
| Root | GMAW | ER70S-6 | 0.035 in | DCEP | 120-280 | 22-30 | 10-20 in/min | either |
| Root | GMAW | ER70S-6 | 0.045 in | DCEP | 150-350 | 23-32 | 10-20 in/min | either |
| Hot Pass | GMAW | ER70S-6 | 0.035 in | DCEP | 120-280 | 22-30 | 10-20 in/min | either |
| Hot Pass | GMAW | ER70S-6 | 0.045 in | DCEP | 150-350 | 23-32 | 10-20 in/min | either |
| Fill | GMAW | ER70S-6 | 0.035 in | DCEP | 120-280 | 22-30 | 10-20 in/min | either |
| Fill | GMAW | ER70S-6 | 0.045 in | DCEP | 150-350 | 23-32 | 10-20 in/min | either |
| Cap | GMAW | ER70S-6 | 0.035 in | DCEP | 120-280 | 22-30 | 10-20 in/min | either |
| Cap | GMAW | ER70S-6 | 0.045 in | DCEP | 150-350 | 23-32 | 10-20 in/min | either |
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
Wire brush. Minimal spatter with pulse.
FIELD TIPS — WeldIQ
▸GMAW-S (short circuit) is NOT prequalified under D1.1. Only spray and pulse transfer are prequalified.
▸Pulse: use manufacturer's synergic programs for wire size. Manual pulse setup requires experience. Keep travel speed consistent.
▸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.
▸Pipe: weld 12→6 clock on one side, then 12→6 on the other. Tie-ins at 6 and 12 o'clock need extra attention.
▸6G: the 2 o'clock and 8 o'clock positions are the hardest — transitioning between vertical and overhead. Reduce amperage slightly there.
▸Internal purge may be required for certain specs (stainless, alloy). Check project requirements.
▸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 I · Table 5.4 (ER70S-6) · Table 5.8 Cat B · Table 6.4
Generated by WeldIQ™ · AWS D1.1:2020 · Prequalified per Clause 5 — Prequalified