Table 6 Record of actual values
From: Comparative study of tube to tubesheet welding qualification on heat exchanger
Variable | Used in qualification | Range qualified | Variable | Used in qualification | Range qualified |
|---|---|---|---|---|---|
Specification | SA 36 to SA 312 TP 316L | - | F-number | F.No.43 | - |
P-Number | P.No-1 to P.No-8 | P.No-1 to P.No-8 | Filler metal/Electrode diameter | 1.6 mm | - |
Welding process | GTAW | GTAW | Deposited thickness | 4.2 mm | - |
Type (manual, semi auto, auto) | Manual | Manual | Welding position | 5G+5F | 5G+5F |
Backing (Yes/No) and type | Yes, metal | With backing only | Welding progression | Uphill | Uphill |
Tube diameter | Ø19.05 mm | Ø17.145 mm and over | Multiple or single pass | Multiple | Multiple |
Tube thickness | 2.11 mm | 1.9 to 2.32 mm | Gas shielding (GTAW) | Argon | Argon |
Ligament size | 5.7 mm | Above 5.13 mm | Current level (1st pass) | 96 Amps | 86.4 Amps to 105.6 Amps |
AWS specification | SFA 5.14 | - | Current level (2nd pass) | 100 Amps | 90.0 Amps to 110 Amps |
AWS classification | ER Ni Cr-3 (INFO, only) | - | Current/Polarity (GTAW) | DCEN | DCEN |
A-number | None | - |