Chemical Requirements |
|||
|---|---|---|---|
| Composition, % | |||
| Grade A | Grade B | Grade C | |
| Carbon, maxA | 0.25 | 0.30 | 0.35 |
| Manganese | 0.27-0.93 | 0.29-1.06 | 0.29-1.06 |
| Phosphorus, max | 0.035 | 0.035 | 0.035 |
| Sulfer, max | 0.035 | 0.035 | 0.035 |
| Silicon, min | 0.10 | 0.10 | 0.10 |
| Chrome, maxB | 0.40 | 0.40 | 0.40 |
| Copper, maxB | 0.40 | 0.40 | 0.40 |
| Molybdenum, maxB | 0.15 | 0.15 | 0.15 |
| Nickel, maxB | 0.40 | 0.40 | 0.40 |
| Vanadium, maxB | 0.08 | 0.08 | 0.08 |
A106 Steel Pipe Testing Requirements
Hydrostatic Testing: In hydrostatic testing, A106 seamless steel pipe samples are subjected to test pressure at 60% of specified minimum yield strength, at ambient temperatures; pressure test is maintained for at least five seconds. Maximum test pressures shall not exceed 2,500 psi for NPS3 steel pipe, or 2,800 psi for all larger sizes.
Mechanical Testing: A106 seamless pipe NPS 8 and larger are weighed in lots; larger sizes are weighed by length. Flattening tests are required on A106 pipe NPS 2-1/2 and larger; cold bend testing is required for A106 pipe NPS 2 and smaller.
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