Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p114
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
Provision Reference: 
Character Range: 319822–322718

of 13 kPa or greater and an 'accuracy' of better than 130 Pa when measuring at 13 kPa.
Technical Note:
For the purposes of 2B230, 'accuracy' includes non‑linearity, hysteresis and repeatability at ambient temperature.
2. B. 231. Vacuum pumps having all of the following characteristics:
a. Input throat size equal to or greater than 380 mm;
b. Pumping speed equal to or greater than 15 m3/s; and
c. Capable of producing an ultimate vacuum better than 13 mPa.
Technical Notes:
1. The pumping speed is determined at the measurement point with nitrogen gas or air.
2. The ultimate vacuum is determined at the input of the pump with the input of the pump blocked off.
2. B. 232. High‑velocity gun systems (propellant, gas, coil, electromagnetic, and electrothermal types, and other advanced systems) capable of accelerating projectiles to 1.5 km/s or greater.
Note:  This item does not apply to guns specially designed for high velocity weapon systems.
2. B. 233. Bellows‑sealed scroll‑type compressors and bellows‑sealed scroll‑type vacuum pumps having all of the following characteristics:
a. Capable of an inlet volume flow rate of 50 m3/h or greater;
2. B. 233. b. Capable of a pressure ratio of 2:1 or greater; and
c. Having all surfaces that come in contact with the process gas made from any of the following materials:
1. Aluminium or aluminium alloy;
2. Aluminium oxide;
3. Stainless steel;
4. Nickel or nickel alloy;
5. Phosphor bronze; or
6. Fluoropolymers.
Technical Notes:
1. In a scroll compressor or vacuum pump, crescent‑shaped pockets of gas are trapped between one or more pairs of intermeshed spiral vanes, or scrolls, one of which moves while the other remains stationary. The moving scroll orbits the stationary scroll; it does not rotate. As the moving scroll orbits the stationary scroll, the gas pockets diminish in size (i.e., they are compressed) as they move toward the outlet port of the machine.
2. In a bellows‑sealed scroll compressor or vacuum pump, the process gas is totally isolated from the lubricated parts of the pump and from the external atmosphere by a metal bellows. One end of the bellows is attached to the moving scroll and the other end is attached to the stationary housing of the pump.
3. Fluoropolymers include, but are not limited to, the following materials:
              a. Polytetrafluoroethylene (PTFE),
              b. Fluorinated Ethylene Propylene (FEP),
              c. Perfluoroalkoxy (PFA),
              d. Polychlorotrifluoroethylene (PCTFE); and
              e. Vinylidene fluoride‑hexafluoropropylene copolymer.
2. B. 350. Chemical manufacturing facilities, equipment and components, as follows:
a. Reaction vessels or reactors, with or without agitators, with total internal (geometric) volume greater than 0.1 m3 (100 litres) and less than 20 m3 (20,000 litres), where all surfaces that come in direct contact with the chemical(s)