| Tubing | Allowable Ultimate Tensile Stress of Welds |
|---|---|
| Normalized tubing — not heat treated (including normalizing) after welding | 1.0 Ftu (based on Ftu of normalized tubing) |
| Heat-treated tubing welded after heat treatment | 1.0 Ftu (based on Ftu of normalized tubing) |
| Tubing heat treated (including normalizing) after welding. Ftu of unwelded material in heat-treated condition: | |
| < 100 ksi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 0.9 Ftu |
| 100 to 150 ksi | 0.6 Ftu + 30 |
| > 150 ksi | 0.8 Ftu |
8.2.2.2 (b). Allowable Bending Modulus of Rupture for Flash Welds in Steel Tubing
| Tubing | Allowable Bending Modulus of Rupture of Welds (Fb from Figure 2.8.1.1 using values of Ftu listed) |
|---|---|
| Normalized tubing — not heat treated (including normalizing after welding | 1.0 Ftu (based on Ftu of normalized tubing) |
| Heat-treated tubing welded after heat treatment. | 1.0 Ftu (based on Ftu of normalized tubing) |
| Tubing heat treated (including normalizing) after welding. Ftu of unwelded material in heat-treated condition: | |
| < 100 ksi .................... | 0.9 Ftu |
| 100 to 150 ksi | 0.6 Ftu + 30 |
| > 150 ksi | 0.8 Ftu |