1971-HKRS30-16-30_Part06 — Page 64

1131.

1133.

4133.

1142

1145.

12

(2) Cryopump systems, not elsewhere specified (Lc. systems in which the circulation of liquefied gas is used to achieve a vacuum, either static or dynamić, by lowering the tempera- ture of the environment);

(2) Specially designed parts, controls and Accessories for the

above pumps.

Pumps (except vacuum pumps) delivering liquids separately or in combination with either solids or gases or both and having any of the Following characteristics—

(a) Designed to move molten metals by electromagnelle forces; (b) Specially designed for operation at temperatures below -274*F. (-170°C), except pumps with a flow rate of 100 gallons (379 litres) per minute or less which are not designed for operation at temperatures below — 328°F. (-200°C));

(c) Having all flow contact surfaces made of any of the follow-

ing materials

G) 90% or more tantalum, titanium or zirconium, either seperately or combined, except materials containing more cham 97% and less than 99.7% titanium;

(1) Polytetrafluoroethylene or the copolymers of tetra- fluoroethylene and hexafluoropropylene,

Valves, cocks and pressure regulators, as follows-

(a) Specially designed to operate at temperatures below –274°F. (-170°C) except those of 2-in. (303 mm) diameter or less specially designed for operation at temperatures from —274°F. (170°C) to -328°F (-200°C), or

(0) Having all flow contact rurfaces made of any of the follow-

ing materials

() 90% or more lantalum, titanium or zirconiura, either separately or combined, except materials containing morc than 97% and less than 99.7% titanium;

(i) Polytetraduoroethylcae or the copolymers of tetra- Ruoroethylene and hexafluoropropylene.

Valves less than 3 centimetres in diameter, with bellows stál, wholly made of or lined with aluminium, nickel, or alloy con- taining 60% or more nickel, either manually or automatically operated, and with other than metal to metal seats. (See also Atomic Energy List, item A.E. 27.)

Pipe, tubing and fittings made of, lined with or covered with polytetrafluoroethylene, polyvinylidene fluoride, or the copoly- mers of tetrafluoroethylene and hexafluoropropylene, chlorotri- #uoroethylene and vinylidencfluoride or bexafluoropropylene and vinylidene&uorida.

Containers, jacketed only, for the storage or transportation of liquefied gases at temperatures below -274°F (-170°C) including mobile unita, as follows--

(a) Specially designed for liquefied gases boiling at temperatures

below - 328*F. (−200°C), as follows-

(1) With multi-laminar type insulation under vacuum; or

1203.

1204.

13

(i) With other types of insulation, having a liquid capa- city of more than 250 gallons (946 litres) and an evaporation loss rate of less than 3% per day as determined at an ambient temperature of 75°F. (24°C) and without exposura to direct sunlight;

(b) Specially designed for liquid fluorine;

(c) Specially designed for liquid oxygen, nitrogen or argon, 16

follows--

(1) With multi-laminar type insulation under vacuum: or (i) With other type of insulation—

(1) fixed storage tanks having a capacity of 300 tons

or more; OI

(2) mobile equipment having a copacity exceeding 1,200 gallons (4,432 litres) and an evaporation loss rate of less than 15% per day as determined at an ambient temperature of 75°F. (24°C) and without exposure to direct sunlight

GROUP C.

ELECTRICAL AND POWER-GENERATING EQUIPMENT.

Electric vacuum furnaces as follows-

(a) Consumable electrode vacuum are furnaces with a capacity

in excess of 5 tons;

(6) Skull type vacuum are furnaces:

(c) Electron beam vacuum furnaces;

(2) Induction Vacuum furnaces, as follows

6) Cold crucible vacuum induction furnaces designed to operate at pressures lower than 0.1 millimetres of mereuty and at temperatures higher than 2,012′′F. (1,100°C.);

(ú) Other vacuum induction furnaces designed to operate at temperatures higher than 3,002°F. (1.650°C.);

(e) Resistance vacuum furnaces designed to operate at temperp-

tures higher than 3,002°F. (1,650°C.) excluding

(D) Furnaces for heat treatment--

(1) up to 12 inches (304 millimetres) x 12 inches (304 millimetres) X 12 inches (304 millimetres) (28,320 cubic centimetres), designed for temperatures not bigher than 4,172*F. (2,300*C);

(2) up to 600 cubic centimetres, designed for tempera-

tures not higher than 4,860°F. (2,682°C)

(i) Melting furnaces up to 3,200 cubic centimetres de- signed for temperatures not bigher than 4,172°F. (2,200°C)

(0 Specialized parts and controls for the above furnaces.

Electron beam equipment, as follows-

(a) Welding or machining equipment or bath, except non-

vacuum electron beam welders;