Table 5 Minimum and maximum values of process parameters
From: Comparative study of tube to tubesheet welding qualification on heat exchanger
S.no | Material | Weld layer | Filler metal | Current (Amp) | Voltage (volts) | Travel speed (mm/min) |
|---|---|---|---|---|---|---|
1 | CS to SS | RP | ER Ni Cr-3 | 96–100 | 8.5–9.8 | 65––74 |
HP | ER Ni Cr-3 | 97–102 | 8.6–10.8 | 55–78 | ||
2 | SS to SS | RP | ER 316L | 99–124 | 9–12 | 60–75 |
HP | ER 316L | 95–104 | 9–12 | 60–70 | ||
3 | AS to AS | RP | ER Ni Cr–3 | 84–85 | 8–10 | 67–69 |
HP | ER Ni Cr-3 | 85–87 | 10–12 | 64–68 |