Evaluation of Equipment Joint Efficiency as per Regulations 366 (a) for Fusion Welded shell will be as follows.
| Equipment Classification | Radiography | Joint Efficiency |
|---|---|---|
| Class - I | FULL | 0.9 (1.0 for Seamless) |
| Class - II | SPOT | 0.50 – If Welded from Both Side 0.75 – If Welded from One Side only (1.0 for Seamless) |
| Class - III | NIL | 0.45 (1.0 for Seamless) |
Evaluation of Equipment Classification as per Regulations 365 (f) (2) for Fusion Welded shell will be as follows.
| Description | Units | Limits of application | ||
|---|---|---|---|---|
| Class - III | Class - II | Class - I | ||
| Working Pressure (Pi) | Kg/cm2 (g) | 4 ≤ Pi < 7 | 7 < Pi ≤ 35 | 35 < Pi |
| Design Temperature (Tdi) | °C | Tdi ≤ 171 | 171 < Tdi ≤ 343 | 343 < Tdi |
| Product of Working Pressure and Inside Diameter (Pi* Di) | Kg/cm | Pi * Di ≤ 940 | 940< Pi * Di ≤3750 | 3750 < Pi * Di |