Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p117
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
Provision Reference: 
Character Range: 327508–330461

in 2B350.g.1. or 2B350.g.2., in which all surfaces that come in direct contact with the chemical(s) being produced, processed, or contained are made from 'corrosion resistant materials', as follows:
a. Casings (valve bodies);
b. Preformed casing liners;
Technical Notes:
1. For the purposes of 2B350.g., 'corrosion resistant materials' means any of the following materials:
a. Nickel or alloys with more than 40% nickel by weight;
b. Alloys with more than 25% nickel and 20% chromium by weight;
c. Fluoropolymers (polymeric or elastomeric materials with more than 35% fluorine by weight);
d. Glass or glass‑lined (including vitrified or enamelled coating);
e. Tantalum or tantalum alloys;
f. Titanium or titanium alloys;
g. Zirconium or zirconium alloys;
h. Niobium (columbium) or niobium alloys; or
i. Ceramic materials as follows:
                     1. Silicon carbide with a purity of 80% or more by weight;
                     2. Aluminium oxide (alumina) with a purity of 99.9% or more by weight;
                     3. Zirconium oxide (zirconia).
2. The 'nominal size' is defined as the smaller of the inlet and outlet diameters.
3.  Nominal sizes (DN) of valves are in accordance with ISO6708:1995. Nominal Pipes Sizes (NPS) are in accordance with ASME B36.19, or national equivalents.
2. B. 350. h. Multi‑walled piping incorporating a leak detection port, in which all surfaces that come in direct contact with the chemical(s) being processed or contained are made from any of the following materials:
1. Alloys with more than 25% nickel and 20% chromium by weight;
2. Fluoropolymers (polymeric or elastomeric materials with more than 35% fluorine by weight);
3. Glass (including vitrified or enamelled coatings or glass lining);
4. Graphite or 'carbon graphite';
5. Nickel or alloys with more than 40% nickel by weight;
6. Tantalum or tantalum alloys;
7. Titanium or titanium alloys;
8. Zirconium or zirconium alloys; or
9. Niobium (columbium) or niobium alloys;
2. B. 350. i. Multiple‑seal and seal‑less pumps, with manufacturer's specified maximum flow‑rate greater than 0.6 m3/hour, or vacuum pumps with manufacturer's specified maximum flow‑rate greater than 5 m3/hour (under standard temperature (273 K (0oC)) and pressure (101.3 kPa) conditions); and casings (pump bodies), preformed casing liners, impellers, rotors or jet pump nozzles designed for such pumps, in which all surfaces that come in direct contact with the chemical(s) being processed are made from any of the following materials:
1. Alloys with more than 25% nickel and 20% chromium by weight;
2. Ceramics;
3. Ferrosilicon (high silicon iron alloys);
4. Fluoropolymers (polymeric or elastomeric materials with more than 35% fluorine by weight);
5. Glass (including vitrified or enamelled coatings or glass lining);
6. Graphite or 'carbon graphite';
7. Nickel or alloys with more than 40% nickel by weight;
8. Tantalum or tantalum alloys;
9. Titanium or titanium alloys;