Notes to 2A001 to 2A006:
(1) DN is the product of the bearing bore diameter in mm and the bearing rotational velocity in rpm.
(2) Operating temperatures include those temperatures obtained when a gas turbine engine has stopped after operation.
(2A001) Ball bearings or solid roller bearings (except tapered roller bearings) having tolerances specified by the manufacturer in accordance with ISO Standard Class 4 (Annular Bearing Engineers Committee (ABEC) 7, ABEC 7P, ABEC 7T) or better, and having any of the following characteristics:
(a) Rings, balls or rollers made from monel or beryllium;
(b) Manufactured for use at operating temperatures above 573 K (300°C) either by using special materials or by special heat treatment; or
(c) With lubricating elements or component modifications that, according to the manufacturer’s specifications, are specially designed to enable the bearings to operate at speeds exceeding 2.3 million DN.
(2A002) Other ball bearings or solid roller bearings (except tapered roller bearings) having tolerances specified by the manufacturer in accordance with ISO Standard Class 2 (Annular Bearing Engineers Committee (ABEC) 9, ABEC 9P or better).
(2A003) Solid tapered roller bearings, having tolerances specified by the manufacturer in accordance with American National Standards Institute (ANSI)/Anti-Friction Bearing Manufacturers Association (AFBMA) Class 00 (inch) or Class A (metric) or better and having either of the following characteristics:
(a) With lubricating elements or component modifications that, according to the manufacturer’s specifications, are specially designed to enable the bearings to operate at speeds exceeding 2.3 million DN; or
(b) Manufactured for use at operating temperatures below 219 K (-54°C) or above 423 K (150°C).
(2A004) Gas-lubricated foil bearings manufactured for use at operating temperatures of 561 K (288°C) or higher and with a unit load capacity exceeding 1 MPa.
(2A005) Active magnetic bearing systems.
(2A006) Fabric-lined self-aligning or fabric-lined journal sliding bearings manufactured for use at operating temperatures below 219 K (-54°C) or above 423 K (150°C).
(2A225) Crucibles made of materials resistant to liquid actinide metals, as follows:
(a) Crucibles with a volume of between 150 ml and 8 litres and made of or coated with any of the following materials having a purity of 98% or greater:
(1) Calcium fluoride (CaF 2 );
(2) Calcium zirconate (metazirconate) (Ca 2 ZrO 3 );
(3) Cerium sulphide (Ce 2 S 3 );
(4) Erbium oxide (erbia) (Er 2 0 3 );
(5) Hafnium oxide (hafnia) (HfO 2 );
(6) Magnesium oxide (MgO);
(7) Nitrided niobium-titanium-tungsten alloy (approximately 50% Nb, 30% Ti, 20%W);
(8) Yttrium oxide (yttria) (Y 2 O 3 ); or
(9) Zirconium oxide (zirconia) (ZrO 2 );
(b) Crucibles with a volume of between 50 ml and 2 litres and made of or lined with tantalum, having a purity of 99.9% or greater;
(c) Crucibles with a volume of between 50 ml and 2 litres and made of or lined with tantalum (having a purity of 98% or greater) coated with tantalum carbide, nitride or boride (or any combination of these).
(2A226) Valves 5 mm or greater in diameter, with a bellows seal, wholly made of or lined with aluminium, aluminium alloy, nickel or alloy containing 60% or more nickel, either manually or automatically operated.
(2B) Test, Inspection and Production Equipment
Note: Entries 2B001 to 2B009 do not specify measuring interferometer systems, without closed or open loop feedback, containing a laser to measure slide movement errors of machine-tools, dimensional inspection machines or similar equipment.
(2B001) Numerical control units, motion control boards specially designed for numerical control applications on machine tools, machine tools, and specially designed components therefor, as follows:
Notes:
(1) Secondary parallel contouring axes, e.g., the w-axis on horizontal boring mills or a secondary rotary axis the centre line of which is parallel to the primary rotary axis, are not counted in the total number of contouring axes.
N.B.: Rotary axes need not rotate over 360°. A rotary axis can be driven by a linear device, e.g., a screw or a rack-and-pinion.
(2) Axis nomenclature shall be in accordance with International Standard ISO 841, ‘Numerical Control Machines – Axis and Motion Nomenclature’.
(a) Numerical control units for machine tools, as follows, and specially designed components therefor:
Note: Head a. of this entry does not specify numerical control units:
(a) Modified for and incorporated in machines not specified in this entry; or
(b) Specially designed for machines not specified in this entry.
(1) Having more than four interpolating axes which can be coordinated simultaneously for contouring control ;
(2) Having two, three or four interpolating axes which can be coordinated simultaneously for contouring control and:
(a) Capable of real time processing of data to modify, during the machining operation, tool path, feed rate and spindle data by either:
(1) Automatic calculation and modification of part programme data for machining in two or more axes by means of measuring cycles and access to source data; or
(2) Adaptive control with more than one physical variable measured and processing by means of a computing model (strategy) to change one or more machining instructions to optimize the process;
(b) Capable of receiving directly (on-line) and processing computer aided design (CAD) data for internal preparation of machine instructions; or
(c) Capable, without modification, according to the manufacturer’s technical specifications, of accepting additional boards which would permit an increase above the levels specified in this entry, in the number of interpolating axes which can be coordinated simultaneously for contouring control, even if they do not contain these additional boards;
(b) Motion control boards specially designed for machine tools and having any of the following characteristics:
(1) Interpolation in more than four axes;
(2) Capable of real time processing as described in sub-head a.2.a. of this entry; or
(3) Capable of receiving and processing CAD data as described in sub-head a.2.b. of this entry;
(c) Machine tools, as follows, for removing or cutting metals, ceramics or composites, which, according to the manufacturer’s technical specifications, can be equipped with electronic devices for simultaneous contouring control in two or more axes:
(1) Machine tools for turning, grinding, milling or any combination thereof which:
(a) Have two or more axes which can be coordinated simultaneously for contouring control ; and
(b) Have any of the following characteristics:
(1) Two or more contouring rotary axes;
Note: The c axis on jig grinders used to maintain grinding wheels normal to the work surface is not considered a contouring rotary axis.
(2) One or more contouring tilting spindles ;
Note: Sub-head c.1.b.2. of this entry applies to machine tools for grinding or milling only.
(3) Camming (axial displacement) in one revolution of the spindle less (better) than 0.0006 mm total indicator reading (TIR);
Note: Sub-head c.1.b.3. of this entry applies to machine tools for turning only.
(4) Run out (out-of-true running) in one revolution of the spindle less (better) than 0.0006 mm TIR;
(5) The positioning accuracies, with all compensations available, are less (better) than:
(a) 0.001° on any rotary axis; or
(b) 1 0.004 mm along any linear axis (overall positioning) for grinding machines;
(2) 0.006 mm along any linear axis (overall positioning) for turning or milling machines; or
Notes:
(1) Sub-head c.1.b.5. of this entry does not specify milling or turning machine tools with a positioning accuracy along one axis, with all compensations available, equal to or more (worse) than 0.005 mm.
(2) The positioning accuracy of numerically controlled machine tools is to be determined and presented in accordance with ISO 230/2 paragraph 2.13, in conjunction with the requirements below:
(a) Test conditions (paragraph 3):
(1) For 12 hours before and during measurements, the machine tool and accuracy measuring equipment will be kept at the same ambient temperature. During the premeasurement time the slides of the machine will be continuously cycled in the same manner that the accuracy measurements will be taken;
(2) The machine shall be equipped with any mechanical, electronic, or software compensation to be exported with the machine;
(3) Accuracy of measuring equipment for the measurements shall be at least four times more accurate than the expected machine tool accuracy;
(4) Power supply for slide drives shall be as follows:
(a) Line voltage variation shall not exceed ± 10% of nominal rated voltage;
(b) Frequency variation shall not exceed ±2 Hz of normal frequency;
(c) Lineouts or interrupted service are not permitted;
(b) Test programme (paragraph 4):
(1) Feed rate (velocity of slides) during measurement shall be the rapid traverse rate, except in the case of machine tools which generate optical quality surfaces, the feed rate shall be equal to or less than 50 mm per minute;
(2) Measurements shall be made in an incremental manner from one limit of the axis travel to the other without returning to the starting position for each move to the target position;
(3) Axes not being measured shall be retained at mid travel during test of an axis;
(c) Presentation of test results (paragraph 2): The results of the measurements must include:
(1) Positioning accuracy (A); and
(2) The mean reversal error (B).
End of Notes
(6) a A positioning accuracy less (better) than 0.007 mm; and
(b) A slide motion from rest for all slides within 20% of a motion command input for inputs of less than 0.5 micrometre;
Notes:
(1) Minimum increment of motion test (slide motion from rest): The test is conducted only if the machine tool is equipped with a control unit the minimum increment of which is less (better) than 0.5 micrometre. Prepare the machine for testing in accordance with ISO 230/2 paragraphs 3.1, 3.2, 3.3.Conduct the test on each axis (slide) of the machine tool as follows:
(a) Move the axis over at least 50% of the maximum travel in plus and minus directions twice at maximum feed rate, rapid traverse rate or jog control;
(b) Wait at least 10 seconds;
(c) With manual data input, input the minimum programmable increment of the control unit;
(d) Measure the axis movement;
(e) Clear the control unit with the servo null, reset or whatever clears any signal (voltage) in the servo loop;
(f) Repeat steps b. to e. above five times, twice in the same direction of the axis travel and three times in the opposite direction of travel for a total of six test points;
(g) If the axis movement is between 80% and 120% of the minimum programmable input for four of the six test points, the machine is controlled.
For rotary axes, the measurement is taken 200 mm from the centre of rotation.
(2) Sub-head c.1. of this entry does not specify cylindrical external, internal and external-internal grinding machines having all of the following characteristics:
(a) Not centreless (shoe-type) grinding machines;
(b) Limited to cylindrical grinding;
(c) A maximum workpiece capacity of 150 mm outside diameter or length;
(d) Only two axes which can be coordinated simultaneously for contouring control ; and
(e) No contouring c axis.
(3) Sub-head c.1. of this entry does not specify machines designed specifically as jig grinders having both of the following characteristics:
(a) Axes limited to x, y, c and a, where the c axis is used to maintain the grinding wheel normal to the work surface and the a axis is configured to grind barrel cams; and
(b) A spindle run out not less (not better) than 0.0006 mm.
(4) Sub-head c.1. of this entry does not specify tool or cutter grinding machines having all of the following characteristics:
(a) Shipped as a complete system with software specially designed for the production of tools or cutters;
(b) No more than two rotary axes which can be coordinated simultaneously for contouring control ;
(c) Run out (out-of-true running) in one revolution of the spindle not less (not better) than 0.0006 mm TIR; and
(d) The positioning accuracies, with all compensations available, are not less (not better) than:
(1) 0.004 mm along any linear axis for overall positioning; or
(2) 0.001° on any rotary axis.
End of Notes
(2) Electrical discharge machines (EDM) of the wire feed type which have five or more axes which can be coordinated simultaneously for contouring control ;
(3) Electrical discharge machines (EDM) of the non-wire type which have two or more rotary axes which can be coordinated simultaneously for contouring control ;
(4) Machine tools for removing metals, ceramics or composites:
(a) By means of:
(1) Water or other liquid jets, including those employing abrasive additives;
(2) Electron beam; or
(3) Laser beam; and
(b) Having two or more rotary axes which:
(1) Can be coordinated simultaneously for contouring control ; and
(2) Have a positioning accuracy of less (better) than 0.003°.
Note: Machines capable of being simultaneously coordinated for contouring control, in two or more rotary axes or one or more tilting spindles, are specified in this entry regardless of the number of simultaneously coordinated contouring axes that can be controlled by the numerical control unit attached to the machine.
(2B002) Non- numerically controlled machine tools for generating optical quality surfaces, as follows:
(a) Turning machines using a single point cutting tool and having all of the following characteristics:
(1) Slide positioning accuracy less (better) than 0.0005 mm per 300 mm of travel;
(2) Bidirectional slide positioning repeatability less (better) than 0.00025 mm per 300 mm of travel;
(3) Spindle run out and camming less (better) than 0.0004 mm TIR;
(4) Angular deviation of the slide movement (yaw, pitch and roll) less (better) than 2 seconds of arc, TIR, over full travel; and
(5) Slide perpendicularity less (better) than 0.001 mm per 300 mm of travel;
Note: The bidirectional slide positioning repeatability (R) of an axis is the maximum value of the repeatability of positioning at any position along or around the axis determined using the procedure and under the conditions specified in part 2.11 of ISO 230/2: 1988.
(b) Fly cutting machines having both of the following characteristics:
(1) Spindle run out and camming less (better) than 0.0004 mm TIR; and
(2) Angular deviation of slide movement (yaw, pitch and roll) less (better) than 2 seconds of arc, TIR, over full travel.
(2B003) Numerically controlled or manual machine tools specially designed for cutting, finishing, grinding or honing either of the following classes of bevel or parallel axis hardened (R c = 40 or more) gears, and specially designed components, controls and accessories therefor:
(a) Hardened bevel gears finished to a quality of better than ISO 1328 class 4; or
(b) Hardened spur, helical and double-helical gears with a pitch diameter exceeding 1,250 mm and a face width of 15% of pitch diameter or larger finished to a quality of ISO 1328 class 3 or better.
(2B004) Hot isostatic presses , as follows, and specially designed dies, moulds, components, accessories and controls therefor :
(a) Having a controlled thermal environment within the closed cavity and possessing a chamber cavity with an inside diameter of 406 mm or more; and
(b) Having:
(1) A maximum working pressure exceeding 207 MPa;
(2) A controlled thermal environment exceeding 1,773 K (1,500°C); or
(3) A facility for hydrocarbon impregnation and removal of resultant gaseous degradation products.
Note: The inside chamber dimension is that of the chamber in which both the working temperature and the working pressure are achieved and does not include fixtures. That dimension will be the smaller of either the inside diameter of the pressure chamber or the inside diameter of the insulated furnace chamber, depending on which of the two chambers is located inside the other.
(2B005) Equipment specially designed for the deposition, processing and in-process control of inorganic overlays, coatings and surface modifications, as follows, for non-electronic substrates, by processes shown in the Table and associated Notes following head d. of entry 2E003, and specially designed automated handling, positioning, manipulation and control components therefor:
(a) Stored programme controlled chemical vapour deposition (CVD) production equipment with both of the following:
(1) Process modified for one of the following:
(a) Pulsating CVD;
(b) Controlled nucleation thermal decomposition (CNTD); or
(c) Plasma enhanced or plasma assisted CVD; and
(2) Either of the following:
(a) Incorporating high vacuum (equal to or less than 0.01 Pa) rotating seals; or
(b) Incorporating in situ coating thickness control;
(b) Stored programme controlled ion implantation production equipment having beam currents of 5 mA or more;
(c) Stored programme controlled electron beam physical vapour deposition (EBPVD) production equipment incorporating:
(1) Power systems rated for over 80 kW;
(2) A liquid pool level laser control system which regulates precisely the ingots feed rate; and
(3) A computer controlled rate monitor operating on the principle of photoluminescence of the ionised atoms in the evaporant stream to control the deposition rate of a coating containing two or more elements;
(d) Stored programme controlled plasma spraying production equipment having either of the following characteristics:
(1) Operating at reduced pressure controlled atmosphere (equal to or less than 10 kPa measured above and within 300 mm of the gun nozzle exit) in a vacuum chamber capable of evacuation down to 0.01 Pa prior to the spraying process; or
(2) Incorporating in situ coating thickness control;
(e) Stored programme controlled sputter deposition production equipment capable of current densities of 0.1 mA/mm 2 or higher at a deposition rate of 15 micrometre/hr or more;
(f) Stored programme controlled cathodic arc deposition production equipment incorporating a grid of electromagnets for steering control of the arc spot on the cathode;
(g) Stored programme controlled ion plating production equipment allowing for the in situ measurement of either:
(1) Coating thickness on the substrate and rate control; or
(2) Optical characteristics.
Note: Head g. of this entry does not specify standard ion plating coating equipment for cutting or machining tools.
(2B006) Dimensional inspection or measuring systems or equipment, as follows:
(a) Computer controlled, numerically controlled or stored programme controlled dimensional inspection machines, having both of the following characteristics:
(1) Two or more axes; and
(2) A one dimensional length measurement uncertainty equal to or less (better) than (1.25 + L/1,000) micrometre tested with a probe with an accuracy of less (better) than 0.2 micrometre (L is the measured length in mm);
(b) Linear and angular displacement measuring instruments, as follows:
(1) Linear measuring instruments having any of the following characteristics:
(a) Non-contact type measuring systems with a resolution equal to or less (better) than 0.2 micrometre within a measuring range up to 0.2 mm;
(b) Linear voltage differential transformer systems with both of the following characteristics:
(1) Linearity equal to or less (better) than 0.1% within a measuring range up to 5 mm; and
(2) Drift equal to or less (better) than 0.1% per day at a standard ambient test room temperature ±1 K; or
(c) Measuring systems having both of the following characteristics:
(1) Containing a laser ; and
(2) Maintaining, for at least 12 hours, over a temperature range of ± 1 K around a standard temperature and at a standard pressure:
(a) A resolution over their full scale of 0.1 micrometre or less (better); and
(b) A measurement uncertainty equal to or less (better) than (0.2 +L/2,000) micrometre (L is the measured length in mm);
(2) Angular measuring instruments having an angular position deviation equal to or less (better) than 0.00025°;
Note: Sub-head b.2. of this entry does not specify optical instruments, such as autocollimators, using collimated light to detect angular displacement of a mirror.
(c) Systems for simultaneous linear-angular inspection of hemishells, having both of the following characteristics:
(1) Measurement uncertainty along any linear axis equal to or less (better) than 3.5 micrometre per 5 mm; and
(2) Angular position deviation equal to or less (better) than 0.02°;
(d) Equipment for measuring surface irregularities, by measuring optical scatter as a function of angle, with a sensitivity of 0.5 nm or less (better).
Notes:
(1) The probe used in determining the measurement uncertainty of a dimensional inspection system shall be as described in Verein Deutscher Ingenieure (VDI) / Verband Deutscher Elektrotechniker (VDE) 2617 Parts 2, 3 and 4.
(2) All measurement values in this entry represent permissible positive and negative deviations from the target value, i.e., not total band.
(3) Machine tools which can be used as measuring machines are specified if they meet or exceed the criteria specified for the machine tool function or the measuring machine function.
(4) A machine described in this entry is specified if it exceeds the threshold anywhere within its operating range.
(5) In this entry measurement uncertainty means the characteristic parameter which specifies in what range around the output value the correct value of the measurable variable lies with a confidence level of 95%. It includes the uncorrected systematic deviations, the uncorrected backlash and the random deviations (Reference: VDI/VDE 2617).
(2B007) Robots, as follows, and specially designed controllers and end-effectors therefor :
(a) Capable in real time of full three-dimensional image processing or full three-dimensional scene analysis to generate or modify programmes or to generate or modify numerical programme data;
Note: The scene analysis limitation does not include approximation of the third dimension by viewing at a given angle, or limited grey scale interpretation for the perception of depth or texture for the approved tasks (2 1/2 D).
(b) Specially designed to comply with national safety standards applicable to explosive munitions environments; or
(c) Specially designed or rated as radiation-hardened beyond that necessary to withstand normal industrial (i.e., non-nuclear industry) ionizing radiation.
(2B008) Assemblies, units or inserts specially designed for machine tools, or for equipment specified in entries 2B006 or 2B007, as follows:
(a) Spindle assemblies, consisting of spindles and bearings as a minimal assembly, with radial (run out) or axial (camming) axis motion in one revolution of the spindle less (better) than 0.0006 mm TIR;
(b) Linear position feedback units (e.g., inductive type devices, graduated scales, infrared systems or laser systems) having an overall accuracy less (better) than (800 + (600 × L × 10 −3 )) nm (L equals the effective length in mm);
(c) Rotary position feedback units, e.g., inductive type devices, graduated scales, infrared systems or laser systems, having an accuracy less (better) than 0.00025°;
(d) Slide way assemblies consisting of a minimal assembly of ways, bed and slide having all of the following characteristics:
(1) A yaw, pitch or roll of less (better) than 2 seconds of arc TIR over full travel;
(2) A horizontal straightness of less (better) than 2 micrometre per 300 mm length; and
(3) A vertical straightness of less (better) than 2 micrometre per 300 mm length;
(e) Single point diamond cutting tool inserts, having all of the following characteristics:
(1) Flawless and chip-free cutting edge when magnified 400 times in any direction;
(2) Cutting radius from 0.1 to 5 mm inclusive; and
(3) Cutting radius out-of-roundness less (better) than 0.002 mm TIR.
(2B009) Specially designed printed circuit boards with mounted components and software therefor, or compound rotary tables or tilting spindles, capable of upgrading, according to the manufacturer’s specifications, numerical control units, machine tools or feed-back devices to or above the levels specified in entries 2B001 to 2B008.
(2B104) Equipment and process controls designed or modified for densification and pyrolysis of structural composite rocket nozzles and reentry vehicle nose tips.
Note: The only isostatic presses and furnaces specified in this entry are as follows:
Isostatic presses , other than those specified in entry 2B004, having all the following characteristics:
Maximum working pressure of 69 MPa or greater;
Designed to achieve and maintain a controlled thermal environment of 873 K (600°C) or greater; and
Possessing a chamber cavity with an inside diameter of 254 mm or greater;
CVD furnaces designed or modified for the densification of carbon-carbon composites.
(2B115) Flow-forming machines, and specially designed components therefor , which:
(a) According to the manufacturer’s technical specification, can be equipped with numerical control units or a computer control, even when not equipped with such units; and
(b) With more than two axes which can be coordinated simultaneously for contouring control .
Note: Machines combining the function of spin-forming and flow-forming are for the purpose of this entry regarded as flow-forming machines.
(2B116) Vibration test equipment and components therefor, the following:
(a) Vibration test systems employing feedback or closed loop techniques and incorporating a digital controller, capable of vibrating a system at 10 g rms or more over the entire range 20 Hz to 2000 Hz and imparting forces of 50 kN (11,250 lbs), measured bare table, or greater;
(b) Digital controllers, combined with specially designed vibration test software, with a real-time bandwidth greater than 5 kHz and designed for use with vibration test systems in head a. of this entry;
(c) Vibration thrusters (shaker units), with or without associated amplifiers, capable of imparting a force of 50 kN (11,250 lbs), measured bare table, or greater and usable in vibration test systems in head a. of this entry;
(d) Test piece support structures and electronic units designed to combine multiple shaker units in a system capable of providing an effective combined force of 50 kN, measured bare table, or greater, and usable in vibration systems in head a. of this entry.
In this entry, “ bare table ” means a flat table, or surface, with no fixtures or fittings.
(2B204) Isostatic presses , other than those specified in entries 2B004 or 2B104, capable of achieving a maximum working pressure of 69 MPa or greater and having a chamber cavity with an inside diameter in excess of 152 mm and specially designed dies, moulds and controls therefor.
(2B207) Robots and end-effectors , other than those specified in entry 2B007, specially designed to comply with national safety standards applicable to handling high explosives (for example, meeting electrical code ratings for high explosives) and specially designed controllers therefor.
(2B215) Spin-forming and flow-forming machines, other than those specified in entry 2B115, and precision rotor-forming mandrels designed to form cylindrical rotors of inside diameter between 75 mm and 400 mm therefor, which:
(a) According to the manufacturer’s technical specification, can be equipped with numerical control units or a computer control; and
(b) With two or more axes that can be coordinated simultaneously for contouring control .
Note: The only spin-forming machines specified in this entry are those combining the function of spin-forming and flow-forming.
(2B225) Remote manipulators that provide mechanical translation of human operator actions by electrical, hydraulic or mechanical means to an operating arm and terminal fixture that can be used to provide remote actions in radiochemical separation operations and hot cells, as follows:
(a) Having a capability of penetrating 0.6 m or more of cell wall; or
(b) Having a capability to bridge over the top of a cell wall with a thickness of 0.6 m or more.
(2B226) Vacuum or controlled environment (inert gas) induction furnaces capable of operating above 1,123 K (850°C) and having induction coils 600 mm or less in diameter and specially designed power supplies therefor with an output rating of 5 kW or more .
Note: This entry does not specify furnaces designed for the processing of semiconductor wafers.
(2B227) Vacuum and controlled atmosphere metallurgical melting and casting furnaces as follows; and specially configured computer control and monitoring systems therefor:
(a) Arc remelt and casting furnaces with consumable electrode capacities between 1000 cm 3 and 20,000 cm 3 , capable of operating with melting temperatures above 1973 K (1700°C);
(b) Electron beam melting and plasma atomization and melting furnaces, with a power of 50 kW or greater, capable of operating with melting temperatures above 1473 K (1200°C).
(2B228) Rotor fabrication and assembly equipment and bellows-forming mandrels and dies, as follows:
(a) Rotor assembly equipment for assembly of gas centrifuge rotor tube sections, baffles and end caps, including associated precision mandrels, clamps and shrink fit machines;
(b) Rotor straightening equipment for alignment of gas centrifuge rotor tube sections to a common axis;
Note: Normally such equipment will consist of precision measuring probes linked to a computer that subsequently controls the action of, for example, pneumatic rams used for aligning the rotor tube sections.
(c) Bellows-forming mandrels and dies for producing single-convolution bellows (bellows made of high-strength aluminium alloys, maraging steel or high strength filamentary materials). The bellows have all of the following dimensions:
(1) 75 mm to 400 mm inside diameter;
(2) 12.7 mm or more in length; and
(3) Single convolution depth more than 2 mm.
(2B229) Centrifugal multiplane balancing machines, fixed or portable, horizontal or vertical, as follows:
(a) Centrifugal balancing machines designed for balancing flexible rotors having a length of 600 mm or more and having all of the following characteristics:
(1) A swing or journal diameter of 75 mm or more;
(2) Mass capability of from 0.9 to 23 kg; and
(3) Capable of balancing speed of revolution more than 5000 rpm;
(b) Centrifugal balancing machines designed for balancing hollow cylindrical rotor components and having all of the following characteristics:
(1) A journal diameter of 75 mm or more;
(2) Mass capability of from 0.9 to 23 kg;
(3) Capable of balancing to a residual imbalance of 0.01 kg mm/kg per plane or better; and
(4) Belt drive type.
(2B230) Instruments capable of measuring pressures up to 13 kPa to an accuracy of better than 1% (full-scale), with corrosion-resistant pressure-sensing elements constructed of nickel, nickel alloys, phosphor bronze, stainless steel, aluminium or aluminium alloys.
(2B231) Vacuum pumps with an input throat size of 380 mm or greater with a pumping speed of 15,000 litres/s or greater and capable of producing an ultimate vacuum better than 13 mPa.
Note: The ultimate vacuum is determined at the input of the pump with the input of the pump blocked off.
(2B232) Multistage light gas gun or other high-velocity gun systems (coil, electromagnetic, electrothermal or other advanced systems) capable of accelerating projectiles to 2 km/s or greater.
(2B350) Chemical manufacturing facilities and equipment, as follows:
(a) Reaction vessels or reactors, with or without agitators, with total internal (geometric) volume greater than 0.1 m 3 (100 litres) and less than 20 m 3 (20,000 litres), where 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;
(3) Glass (including vitrified or enamelled coating or glass lining);
(4) Nickel or alloys with more than 40% nickel by weight;
(5) Tantalum or tantalum alloys;
(6) Titanium or titanium alloys; or
(7) Zirconium or zirconium alloys;
(b) Agitators for use in reaction vessels or reactors where all surfaces of the agitator 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;
(3) Glass (including vitrified or enamelled coating or glass lining);
(4) Nickel or alloys with more than 40% nickel by weight;
(5) Tantalum or tantalum alloys;
(6) Titanium or titanium alloys; or
(7) Zirconium or zirconium alloys;
(c) Storage tanks, containers or receivers with a total internal (geometric) volume greater than 0.1 m 3 (100 litres) where 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;
(3) Glass (including vitrified or enamelled coatings or glass lining);
(4) Nickel or alloys with more than 40% nickel by weight;
(5) Tantalum or tantalum alloys;
(6) Titanium or titanium alloys; or
(7) Zirconium or zirconium alloys;
(d) Heat exchangers or condensers with a heat transfer surface area of less than 20 m 2 , where 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) Fluoropolymers;
(3) Glass (including vitrified or enamelled coatings or glass lining);
(4) Graphite;
(5) Nickel or alloys with more than 40% nickel by weight;
(6) Tantalum or tantalum alloys;
(7) Titanium or titanium alloys; or
(8) Zirconium or zirconium alloys;
(e) Distillation or absorption columns of internal diameter greater than 0.1 m, where 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) Fluoropolymers;
(3) Glass (including vitrified or enamelled coatings or glass lining);
(4) Graphite;
(5) Nickel or alloys with more than 40% nickel by weight;
(6) Tantalum or tantalum alloys;
(7) Titanium or titanium alloys; or
(8) Zirconium or zirconium alloys;
(f) Remotely operated filling equipment 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; or
(2) Nickel or alloys with more than 40% nickel by weight;
(g) Multiple seal valves incorporating a leak detection port, bellows-seal valves, non-return (check) valves or diaphragm valves, 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;
(3) Glass (including vitrified or enamelled coatings or glass lining);
(4) Nickel or alloys with more than 40% nickel by weight;
(5) Tantalum or tantalum alloys;
(6) Titanium or titanium alloys; or
(7) Zirconium or zirconium alloys;
(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;
(3) Glass (including vitrified or enamelled coatings or glass lining);
(4) Graphite;
(5) Nickel or alloys with more than 40% nickel by weight;
(6) Tantalum or tantalum alloys;
(7) Titanium or titanium alloys; or
(8) Zirconium or zirconium alloys;
(i) Multiple-seal, canned drive, magnetic drive, bellows or diaphragm pumps, 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 (under standard temperature (273 K (0°C)) and pressure (101.3 kPa) conditions), 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;
(4) Fluoropolymers;
(5) Glass (including vitrified or enamelled coatings or glass lining);
(6) Graphite;
(7) Nickel or alloys with more than 40% nickel by weight;
(8) Tantalum or tantalum alloys;
(9) Titanium or titanium alloys; or
(10) Zirconium or zirconium alloys;
(j) Incinerators designed to destroy chemicals specified in entry 1C350, having specially designed waste supply systems, special handling facilities and an average combustion chamber temperature greater than 1273 K (1000°C), in which all surfaces in the waste supply system that come into direct contact with the waste products are made from or lined with any of the following materials:
(1) Alloys with more than 25% nickel and 20% chromium by weight;
(2) Ceramics; or
(3) Nickel or alloys with more than 40% nickel by weight.
(2B351) Toxic gas monitoring systems, as follows, and dedicated detectors therefor:
(a) Designed for continuous operation and usable for the detection of chemical warfare agents, chemicals specified in entry 1C350 or organic compounds containing phosphorus, sulphur, fluorine or chlorine, at concentrations of less than 0.3 mg/m 3 ; or
(b) Designed for the detection of cholinesterase-inhibiting activity.
(2B352) Equipment capable of use in biological manufacturing, as follows;
(a) Containment facilities at Containment Level (ACDP) 3 or 4, and related equipment, as follows:
(1) Facilities that meet the criteria for Containment Level 3 or 4 as specified in guidance from the Advisory Committee on Dangerous Pathogens approved by the Health and Safety Commission (published by HMSO, Second Edition 1990);
Note: The criteria for Containment Level 3 or 4 in head a. of this entry are equivalent to the criteria for P3 or P4, BL3 or BL4, L3 or L4 containment as specified in the WHO Laboratory Biosafety manual (Geneva, 1983).
(2) Independently ventilated protective full or half suits;
(3) Biological safety cabinets or isolators, which allow manual operations to be performed within, whilst providing an environment equivalent to Class III biological protection;
Note: In this sub-head, “isolators” include flexible isolators, dry boxes, anaerobic chambers and glove boxes.
(b) Fermenters, bioreactors, chemostats and continuous-flow systems, capable of operation without the propagation of aerosols, having all the following characteristics:
(1) Capacity of 300 litres or more;
(2) Double or multiple sealing joints within the steam containment area; and
(3) Capable of in-situ sterilisation in a closed state;
(c) Centrifugal separators or decanters, capable of continuous separation without the propagation of aerosols, having all the following characteristics:
(1) Flow rate exceeding 100 litres per hour;
(2) Components of polished stainless steel or titanium;
(3) Double or multiple sealing joints within the steam containment area; and
(4) Capable of in-situ sterilisation in a closed state;
(d) Cross-flow filtration equipment, designed for continuous separation without the propagation of aerosols, having both of the following characteristics:
(1) Equal to or greater than 5 square metres; and
(2) Capable of in-situ sterilization;
(e) Steam sterilisable freeze drying equipment with a condenser capacity exceeding 50 kg of ice in 24 hours and less than 1,000 kg of ice in 24 hours;
(f) Chambers designed for aerosol challenge testing with pathogenic microorganisms or toxins and having a capacity of 1 m 3 or greater.