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|
|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.
|Grade 1||Grade 3||Grade 6|
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
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.