The scope of this order covers finished carbon steel flanges.
Finished carbon steel flanges differ from unfinished carbon steel
flanges (also known as carbon steel flange forgings) in that they
have undergone further processing after forging, including, but not
limited to, beveling, bore threading, center or step boring, face
machining, taper boring, machining ends or surfaces, drilling bolt
holes, and/or de-burring or shot blasting. Any one of these post-
forging processes suffices to render the forging into a finished
carbon steel flange for purposes of this order. However, mere heat
treatment of a carbon steel flange forging (without any other
further processing after forging) does not render the forging into a
finished carbon steel flange for purposes of this order.
While these finished carbon steel flanges are generally
manufactured to specification ASME B16.5 or ASME B16.47 series A or
series B, the scope is not limited to flanges produced under those
specifications. All types of finished carbon steel flanges are
included in the scope regardless of pipe size (which may or may not
be expressed in inches of nominal pipe size), pressure class
(usually, but not necessarily, expressed in pounds of pressure,
e.g., 150, 300, 400, 600, 900, 1500, 2500, etc.), type of face
(e.g., flat face, full face, raised face, etc.), configuration
(e.g., weld neck, slip on, socket weld, lap joint, threaded, etc.),
wall thickness (usually, but not necessarily, expressed in inches),
normalization, or whether or not heat treated. These carbon steel
flanges either meet or exceed the requirements of the ASTM A105,
ASTM A694, ASTM A181, ASTM A350 and ASTM A707 standards (or
comparable foreign specifications). The scope includes any flanges
produced to the above-referenced ASTM standards as currently stated
or as may be amended. The term ``carbon steel'' under this scope is
steel in which:
(a) Iron predominates, by weight, over each of the other
contained elements:
(b) The carbon content is 2 percent or less, by weight; and
(c) none of the elements listed below exceeds the quantity, by
weight, as indicated:
(i) 0.87 percent of aluminum;
(ii) 0.0105 percent of boron;
(iii) 10.10 percent of chromium;
(iv) 1.55 percent of columbium;
(v) 3.10 percent of copper;
(vi) 0.38 percent of lead;
(vii) 3.04 percent of manganese;
(viii) 2.05 percent of molybdenum;
(ix) 20.15 percent of nickel;
(x) 1.55 percent of niobium;
(xi) 0.20 percent of nitrogen;
(xii) 0.21 percent of phosphorus;
(xiii) 3.10 percent of silicon;
(xiv) 0.21 percent of sulfur;
(xv) 1.05 percent of titanium;
(xvi) 4.06 percent of tungsten;
(xvii) 0.53 percent of vanadium; or
(xviii) 0.015 percent of zirconium.
Finished carbon steel flanges are currently classified under
subheadings 7307.91.5010 and 7307.91.5050 of the Harmonized Tariff
Schedule of the United States (HTSUS). They may also be entered
under HTSUS subheadings 7307.91.5030 and 7307.91.5070. The HTSUS
subheadings are provided for convenience and customs purposes; the
written description of the scope is dispositive.
Source: 82 FR 40138 (August 24, 2017) |