| Hydrostatic Test |
Mandatory for every tube. |
Not required by the standard. May be specified as an additional requirement. |
| Nondestructive Electric Test (e.g., Eddy Current) |
Mandatory for every tube. |
Not required for all. Performed on a lot basis:
• Seamless Tube Lot: Max 50 tubes.
• Welded Tube Lot: One tube per 50 ft (15 m) of finished length. |
| Tensile & Flattening Tests |
Per lot. Lot size is smaller:
• Seamless: One test per 50 tubes.
• Welded: One test per 200 ft (60 m). |
Per lot. Lot size is larger:
• Seamless/Welded: One test per 500 tubes or 5000 ft (1500 m), whichever is less. |
| Hardness Test |
One test per lot (same lot rules as tensile). |
One test per lot (same lot rules as tensile). |
| Reverse Flattening Test (for welded tubes) |
One test per 200 ft (60 m). |
One test per 500 tubes or 5000 ft (1500 m). |
| Flare or Flange Test |
Required for specific grades/types. One test per lot. |
Required for specific grades/types. One test per 500 tubes or 5000 ft (1500 m). |
| Visual Examination |
Mandatory for every tube. |
Mandatory for every tube. |
