Multiple-seal, and seal-less pumps, other than those specified in 2B350.i, suitable for corrosive fluids, with manufacturer’s specified maximum flow-rate greater than 0,6 m 3 /hour, or vacuum pumps with manufacturer’s specified maximum flow-rate greater than 5 m 3 /hour [measured under standard temperature (273 K or 0 o C) 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 any of the following: NB. SEE ALSO III.A2.010. a. Made from any of the following materials: 1. Alloys with more than 25 % nickel and 20 % chromium by weight; 2. Ceramics; 3. Ferrosilicon; 4. Fluoropolymers; 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; 10. Zirconium or zirconium alloys; 11. Niobium (columbium) or niobium alloys; or 12. Aluminium alloys; or b. Made from both stainless steel and one or more of the materials specified in II.A2.016.a. Technical Note: The materials used for gaskets and seals and other implementation of sealing functions do not determine the status of control of the pump.