ASTM A333 pipe covers seamless and welded carbon steel pipe that is intended for cold temperature service tolerating temperatures as low as -150°F.
Required Information for Ordering
| Characteristic | What to Specify |
| Quantity | Feet or number of lengths |
| Size | NPS (Outside Diameter) and Schedule Number (Average Wall Thickness) |
| Construction | Seamless or Welded |
| Grade | Grade 1,3, or 6 |
| Coating | Bare, Black, FBE, etc |
| Manufacturer | Approved Manufacturer List (AML), or Country of Origin restrictions |
CHEMICAL REQUIREMENTS
| Grade | C (max %) |
Mn | P (max %) |
S (max %) |
Si | Ni |
| Grade 1 | 0.3 | 0.40 – 1.06 | 0.025 | 0.025 | ||
| Grade 3 | 0.19 | 0.31 – 0.64 | 0.025 | 0.025 | 0.18 – 0.37 | 3.18 – 3.82 |
| Grade 6 | 0.3 | 0.29 – 1.06 | 0.025 | 0.025 | 0.10 min |
For each reduction of 0.01% carbon below 0.30%, an increase of 0.05% manganese above 1.06% would be permitted to a maximum of 1.35% manganese.
MECHANICAL PROPERTIES
| Grade 1 | Grade 3 | Grade 6 | |
| Tensile Strength (min PSI) |
55,000 | 65,000 | 60,000 |
| Yield Strength (min PSI) |
30,000 | 35,000 | 35,000 |
IMPACT REQUIREMENTS
Material is always provided in the normalized condition at a minimum and Charpy Impact tested to a specific temperature range to assure compliance with the required service temperature.
Minimum Impact Test Temperature
| Grade | F | C |
| 1 | -50 | -45 |
| 3 | -150 | -100 |
| 6 | -50 | -45 |
MECHANICAL TESTING
Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. For small lots, at least one pipe shall be tested. For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe. Hydrostatic Test Impact Test One notched bar impact test, consisting of breaking three specimens shall be made from each heat represented in a heat-treatment load on specimens taken from the finished pipe.
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