ICS classification of standards

01 Generalities. Terminology. Standardization. Documentation

01.020 Terminology (principles and coordination, including terminography)

01.040 Vocabularies (Standards included in this group shall also be included in other groups and/or sub -groups according to their subject)

01.040.01 Generalities. Terminology. Standardization. Documentation (Vocabularies)

01.040.03 Services. Company organization, management and quality. Administration. Transport. Sociology. (Vocabularies)

01.040.07 Mathematics. Natural sciences (Vocabularies)

01.040.11 Health care technology (Vocabularies)

01.040.13 Environment. Health protection. Safety (Vocabularies)

01.040.17 Metrology and measurement. Physical phenomena (Vocabularies)

01.040.19 Testing (Vocabularies)

01.040.21 Mechanical systems and components for general use (Vocabularies)

01.040.23 Fluid systems and components for general use (Vocabularies)

01.040.25 Manufacturing engineering (Vocabularies)

01.040.27 Energy and heat transfer engineering (Vocabularies)

01.040.29 Electrical engineering (Vocabularies)

01.040.31 Electronics (Vocabularies)

01.040.33 Telecommunications. Audio and video engineering (Vocabularies)

01.040.35 Information technology. Office machines (Vocabularies)

01.040.37 Image technology (Vocabularies)

01.040.39 Precision mechanics. Jewellery (Vocabularies)

01.040.43 Road vehicle engineering (Vocabularies)

01.040.45 Railway engineering (Vocabularies)

01.040.47 Shipbuilding and marine structures (Vocabularies)

01.040.49 Aircraft and space vehicle engineering (Vocabularies)

01.040.53 Materials handling equipment (Vocabularies)

01.040.55 Packaging and distribution of goods (Vocabularies)

01.040.59 Textile and leather technology (Vocabularies)

01.040.61 Clothing industry (Vocabularies)

01.040.65 Agriculture (Vocabularies)

01.040.67 Food technology (Vocabularies)

01.040.71 Chemical technology (Vocabularies)

01.040.73 Mining and minerals (Vocabularies)

01.040.75 Petroleum and related technologies (Vocabularies)

01.040.77 Metallurgy (Vocabularies)

01.040.79 Wood technology (Vocabularies)

01.040.81 Glass and ceramics industries (Vocabularies)

01.040.83 Rubber and plastics industries (Vocabularies)

01.040.85 Paper technology (Vocabularies)

01.040.87 Paint and colour industries (Vocabularies)es)

01.040.91 Construction materials and building (Vocabularies)

01.040.93 Civil engineering (Vocabularies)

01.040.95 Military engineering (Vocabularies)

01.040.97 Domestic and commercial equipment. Entertainment. Sports (Vocabularies)

01.060 Quantities and units (Standards included in this group shall also be included in other groups and/or sub -groups according to their subject)

01.070 Colour coding (Standards included in this group shall also be included in other groups and/or sub -groups according to their subject)

01.075 Character symbols (Standards included in this group shall also be included in other groups and/or sub -groups according to their subject)

01.080 Graphical symbols

01.080.01 Graphical symbols in general

01.080.10 Public information symbols

01.080.20 Graphical symbols for use on specific equipment (Standards included in this group shall also be included in other groups and/or sub -groups according to their subject)

01.080.30 Graphical symbols for use on mechanical engineering and construction drawings, diagrams, plans, maps and in relevant technical product documentation (Standards included in this group shall also be included in other groups and/or sub -groups according to their subject)

01.080.40 Graphical symbols for use on electrical and electronics engineering drawings, diagrams, charts and in relevant technical product documentation (Standards included in this group shall also be included in other groups and/or sub -groups according to their subject)

01.080.50 Graphical symbols for use on information technology and telecommunications technical drawings and in relevant technical product documentation (Standards included in this group shall also be included in other groups and/or sub -groups according to their subject)

01.080.99 Other graphical symbols

01.100 Technical drawings (see also 01.080.30 and 35.240.10)

01.100.01 Technical drawings in general

01.100.20 Mechanical engineering drawings

01.100.25 Electrical and electronics engineering drawings (including electrical tables, diagrams and charts)

01.100.27 Technical drawings for telecommunications and information technology fields

01.100.30 Construction drawings (including civil engineering drawings)

01.100.40 Drawing equipment

01.100.99 Other standards related to technical drawings

01.110 Technical product documentation (including rules for preparation of user guides, manuals, product specifications, etc.)

01.120 Standardization. General rules (including rules for the preparation of standards catalogues and management of technical documents)

01.140 Information sciences. Publishing (see also 35.240.30)

01.140.10 Writing and transliteration (see also 35.040)

01.140.20 Information sciences (including documentation, librarianship and archive systems)

01.140.30 Documents in administration, commerce and industry (see also 01.110, 03.060 and 35.240.60)

01.140.40 Publishing (see also 35.240.30)

03 Services. Company organization, management and quality. Administration. Transport

03.020 Sociology. Demography

03.040 Labour. Employment (see also 13.040.30 and 13.180)

03.060 Finances. Banking. Monetary systems. Insurance (including personal financial planning, see also 35.240.40)

03.080 Services (see also 03.220 and 03.240)

03.080.01 Services in general

03.080.10 Industrial services (including maintenance, cleaning, etc.)

03.080.20 Services for companies (including publicity, advertising, etc., see also 03.100.30)

03.080.30 Services for consumers (including hotels, restaurants, washing, cleaning, removals, funerals, etc., see also 03.220, 97.020)

03.080.99 Other services

03.100 Company organization and management

03.100.01 Company organization and management in general (including legal aspects and risk management)

03.100.10 Purchasing. Procurement. Logistics

03.100.20 Trade. Commercial function. Marketing (see also 35.240.60)

03.100.30 Management of human resources (including staff training, staff responsibilities, staff qualifications and certification, see also 25.160.01)

03.100.40 Research and development (including project management, value analysis, etc.)

03.100.50 Production. Production management

03.100.60 Accountancy

03.100.99 Other standards related to company organization and management

03.120 Quality

03.120.01 Quality in general (including general aspects related to reliability and maintainability)

03.120.10 Quality management and quality assurance

03.120.20 Product and company certification. Conformity assessment (including laboratory accreditation and audit programmes and auditing)

03.120.30 Application of statistical methods.

03.120.99 Other standards related to quality

03.140 Patents. Intellectual property

03.160 Law. Administration (including flags and associated symbols (emblems) of political and administrative entities, military flags, flags of organizations, etc. This group includes standards for general use)

03.180 Education (see also 35.240.99)

03.200 Leisure. Tourism (see also 97.200.30)

03.220 Transport (see also 13.300)

03.220.01 Transport in general

03.220.20 Road transport (including road transport services, see also 93.080.30)

03.220.30 Transport by rail (including rail transport services, see also 93.100)

03.220.40 Transport by water (including water transport services, see also 93.140)

03.220.50 Air transport (including air transport services, see also 93.120)

03.220.99 Other forms of transport

03.240 Postal services (including postal equipment, post-boxes and letter-boxes, etc.)

07 Mathematics. Natural sciences

07.020 Mathematics (see also 03.120.30)

07.030 Physics. Chemistry (This group includes standards in the field of physics and chemistry as natural sciences, see also 17 and 71)

07.040 Astronomy. Geodesy. Geography

07.060 Geology. Meteorology. Hydrology

07.080 Biology. Botany. Zoology (including biotechnology)

07.100 Microbiology

07.100.01 Microbiology in general

07.100.10 Medical microbiology (see also 11.100)

07.100.20 Microbiology of water (see also 13.060.70)

07.100.30 Food microbiology (including microbiology of animal feeding stuffs, see also 65.120 and 67.050)

07.100.99 Other standards related to microbiology

11 Health care technology

11.020 Medical sciences and health care facilities in general (including quality and environmental management in health care technology, see also 35.240.80)

11.040 Medical equipment

11.040.01 Medical equipment in general

11.040.10 Anaesthetic, respiratory and reanimation equipment (including medical gas installations)

11.040.20 Transfusion, infusion and injection equipmention (including blood packs, see also 11.040.25)

11.040.25 Syringes, needles and catheters

11.040.30 Surgical instruments and materials (including surgical dressings, sutures, etc.)

11.040.40 Implants for surgery, prosthetics and orthotics (including pacemakers, see also 11.040.70)

11.040.50 Radiographic equipment (including radiographic diagnostic and therapy equipment, see also 37.040.25)

11.040.55 Diagnostic equipment (including medical monitoring equipment, medical thermometers and related materials)

11.040.60 Therapy equipment

11.040.70 Ophthalmic equipment (including ophthalmic implants, glasses, contact lenses and their cleaning products)

11.040.99 Other medical equipment

11.060 Dentistry

11.060.01 Dentistry in general

11.060.10 Dental materials

11.060.15 Dental implants (including dentures)

11.060.20 Dental equipment (see also 37.040.25 and 97.170)

11.060.25 Dental instruments

11.080 Sterilization and disinfection

11.080.01 Sterilization and disinfection in general (including sterilization methods, air quality of surgery rooms, etc.)

11.080.10 Sterilizing equipment

11.080.20 Disinfectants and antiseptics (see also 71.100.35)

11.080.30 Sterilized packaging

11.080.99 Other standards related to sterilization and disinfection

11.100 Laboratory medicine

11.100.01 Laboratory medicine in general

11.100.10 In vitro diagnostic test systems

11.100.20 Biological evaluation of medical devices (see also 07.100.10)

11.100.30 Analysis of blood and urine (including doping control)

11.100.99 Other standards related to laboratory medicine

11.120 Pharmaceutics

11.120.01 Pharmaceutics in general

11.120.10 Medicaments (including medical prescriptions and medicinal herbs)

11.120.20 Wound dressings and compresses

11.120.99 Other standards related to pharmaceutics (including equipment for pharmaceutical industry)

11.140 Hospital equipment (including hospital beds, surgical tables, medical garments, medical gloves, containers for sharp disposal, etc.)

11.160 First aid (including kits, equipment, facilities and medical transport for first aid)

11.180 Aids for disabled or handicapped persons (including aids for elderly people)

11.180.01 Aids for disabled and handicapped persons in general

11.180.10 Aids and adaptation for moving (including wheelchairs, walking sticks and lifting platforms)

11.180.15 Aids for deaf and hearing impaired people

11.180.20 Aids for incontinence and ostomy

11.180.30 Aids for blind or partially sighted people (including Braille, see also 11.040.70)

11.180.40 Aids for drinking and eating

11.180.99 Other standards related to aids for disabled and handicapped people

11.200 Birth control. Mechanical contraceptives

11.220 Veterinary medicine (including equipment specific to veterinary medicine)

13 Environment. Health protection. Safety

13.020 Environmental protection

13.020.01 Environment and environmental protection in general

13.020.10 Environmental management (including Environmental Management Systems (EMS), certification and audit)

13.020.20 Environmental economics (including sustainable development)

13.020.30 Environmental impact assessment (including environmental risk management)

13.020.40 Pollution, pollution control and conservation (including ecotoxicology)

13.020.50 Ecolabelling

13.020.60 Product life-cycles

13.020.70 Environmental projects

13.020.99 Other standards related to environmental protection

13.030 Wastes (Standards for industrial and agricultural wastes should be classified under sub -groups acoording to their type)

13.030.01 Wastes in general

13.030.10 Solid wastes

13.030.20 Liquid wastes. Sludge (see also 13.060.30)

13.030.30 Special wastes (including radioactive wastes, hospital wastes, carcasses, and other hazardous wastes)

13.030.40 Installations and equipment for waste disposal and treatment (including street cleaning equipment, waste containers, incineration and compaction equipment, equipment for dumping of refuse, landfill sites, etc., see also 43.160, 91.140.70 and 97.040.50)

13.030.50 Recycling (including relevant equipment)

13.030.99 Other standards related to wastes (including waste prevention)

13.040 Air quality

13.040.01 Air quality in general

13.040.20 Ambient atmospheres (including indoor air)

13.040.30 Workplace atmospheres (see also 11.080.01)

13.040.35 Cleanrooms and associated controlled environments

13.040.40 Stationary source emissions

13.040.50 Transport exhaust emissions

13.040.99 Other standards related to air quality

13.060 Water quality (including toxicity, biodegradability, protection against pollution, related installations and equipment. Standards for examination of water should be classified under sub -groups acoording to their type of water)

13.060.01 Water quality in general

13.060.10 Water of natural resources

13.060.20 Drinking water (see also 67.160.20, 71.100.80 and 91.140.60)

13.060.25 Water for industrial use (including water for commercial use: for swimming pools, fish breeding, etc.)

13.060.30 Sewage water (including sewage water disposal and treatment, see also 13.030.20, 91.140.80 and 93.030)

13.060.45 Examination of water in general (including sampling)

13.060.50 Examination of water for chemical substances

13.060.60 Examination of physical properties of water

13.060.70 Examination of biological properties of water (see also 07.100.20)

13.060.99 Other standards related to water quality

13.080 Soil quality. Pedology (see also 93.020)

13.080.01 Soil quality and pedology in general (including pollution, erosion, degradation, etc.)

13.080.05 Examination of soils in general (including sampling)

13.080.10 Chemical characteristics of soils

13.080.20 Physical properties of soils

13.080.30 Biological properties of soils

13.080.40 Hydrological properties of soils

13.080.99 Other standards related to soil quality (including agricultural aspects related to soils and re-use of soil materials)

13.100 Occupational safety. Industrial hygiene

13.110 Safety of machinery (this group includes standards for general use)

13.120 Domestic safety (see also 97.190 and 97.200.50)

13.140 Noise with respect to human beings (including audiometry, see also 13.340.20 and 17.140)

13.160 Vibration and shock with respect to human beings (see also 17.160)

13.180 Ergonomics

13.200 Accident and disaster control (including emergency evacuations and emergency control systems, see also 91.120.25)

13.220 Protection against fire

13.220.01 Protection against fire in general (including fire safety)

13.220.10 Fire-fighting (including equipment and vehicles, see also 13.340.10)

13.220.20 Fire protection (including equipment)

13.220.40 Ignitability and burning behaviour of materials and products

13.220.50 Fire-resistance of building materials and elements

13.220.99 Other standards related to protection against fire

13.230 Explosion protection (see also 29.260.20 and 71.100.30)

13.240 Protection against excessive pressure

13.260 Protection against electric shock. Live working (including tools for working with voltages)

13.280 Radiation protection (including protection against radio-frequency radiation, see also 17.240)

13.300 Protection against dangerous goods (including performance requirements for dangerous goods, their handling, storage, transportation, marking, labelling, etc., see also 27.120.30 and 71.100.30)

13.310 Protection against crime (including security services, security procedures, burglar alarm devices, burglary resisting materials and equipment, bullet resisting materials and equipment, anti-theft devices for vehicles, safes, strong rooms, etc.)

13.320 Alarm and warning systems (see also 13.310 and 43.040.20)

13.340 Protective equipment (see also 13.100)

13.340.01 Protective equipment in general

13.340.10 Protective clothing (including flameproof clothing)

13.340.20 Head protective equipment (including helmets, eye-protectors, hearing protectors, ear muffs, teeth protectors and hoods.)

13.340.30 Respiratory protective devices

13.340.40 Hand and arm protection (including protective gloves, sleeves and mits, see also 11.140)

13.340.50 Leg and foot protection (including safety boots and shoes)

13.340.60 Protection against falling and slipping (including safety ropes, harnesses and fall arrestors, see also 97.220.40)

13.340.70 Lifejackets, buoyancy aids and flotation devices

13.340.99 Other protective equipment

17 Metrology and measurement. Physical phenomena

17.020 Metrology and measurement in general (including measuring instruments in general, preferred numbers, standard measures, general aspects of reference materials, etc., see also 01.060 and 71.040.30)

17.040 Linear and angular measurements (including Geometrical Product Specification (GPS))

17.040.01 Linear and angular measurements in general

17.040.10 Limits and fits

17.040.20 Properties of surfaces

17.040.30 Measuring instruments

17.040.99 Other standards related to linear and angular measurements

17.060 Measurement of volume, mass, density, viscosity (including measuring instruments, see also 75.180.30)

17.080 Measurement of time, velocity, acceleration, angular velocity (including measuring instruments, see also 39.040)

17.100 Measurement of force, weight and pressure (including measuring and weighing instruments)

17.120 Measurement of fluid flow (including measuring instruments and installations)

17.120.01 Measurement of fluid flow in general

17.120.10 Flow in closed conduits (see also 91.140.40 and 91.140.60)

17.120.20 Flow in open channels (including hydrometric determinations)

17.140 Acoustics and acoustic measurements (including measuring instruments and testing equipment, see also 13.140 and 91.120.20)

17.140.01 Acoustic measurements and noise abatement in general (including acoustic insulation)

17.140.20 Noise emitted by machines and equipment (Standards included in this group shall also be included in other groups and/or sub -groups according to their subject)

17.140.30 Noise emitted by means of transportment (including road noise, railway noise, harbour noise and airport noise. Standards included in this group shall also be included in other groups and/or sub -groups according to their subject)

17.140.50 Electroacoustics (including sound level meters)

17.140.99 Other standards related to acoustics

17.160 Vibrations, shock and vibration measurements (including measuring instruments and installations, see also 13.160, 21.120.40 and 91.120.25)

17.180 Optics and optical measurements

17.180.01 Optics and optical measurements in general

17.180.20 Colours and measurement of light

17.180.30 Optical measuring instruments (including spectroscopes, geodetic instruments, etc., see also 11.040.70, 31.260, 33.180, 37.020 and 37.040.10)

17.180.99 Other standards related to optics and optical measurements

17.200 Thermodynamics and temperature measurements

17.200.01 Thermodynamics in general

17.200.10 Heat. Calorimetry

17.200.20 Temperature-measuring instruments (including thermostats, see also 11.040.55)

17.200.99 Other standards related to thermodynamics

17.220 Electricity. Magnetism. Electrical and magnetic measurements

17.220.01 Electricity. Magnetism. General aspects (including electromagnetism)

17.220.20 Measurement of electrical and magnetic quantities (including measuring instruments, instrument transformers, see also 91.140.50)

17.220.99 Other standards related to electricity and magnetism

17.240 Radiation measurements (including dosimetry, see also 13.280)

19 Testing (This group includes standards for general use, see also 71.040)

19.020 Test conditions and procedures in general

19.040 Environmental testing (including testing equipment)

19.060 Mechanical testing (including testing equipment, see also 77.040.10)

19.080 Electrical and electronic testing (including testing equipment, see also 17.220.20)

19.100 Non-destructive testing in general (including testing equipment: industrial apparatus for X-ray and gamma radiography, penetrant flaw detectors, etc., see also 25.160.40, 37.040.25 and 77.040.20)

19.120 Particle size analysis. Sieving (including test sieves and porosimetry)

21 Mechanical systems and components for general use

21.020 Characteristics and design of machines, apparatus, equipment (including reliability, dependability, maintainability, durability, etc., see also 13.110)

21.040 Screw threads (see also 49.030.10)

21.040.01 Screw threads in general

21.040.10 Metric screw threads

21.040.20 Inch screw threads (including Whitworth screw threads, see also 21.040.30)

21.040.30 Special screw threads (including miniature screw threads, pipe threads, etc.)

21.060 Fasteners (see also 11.040.40 and 49.030)

21.060.01 Fasteners in general

21.060.10 Bolts, screws, studs

21.060.20 Nuts

21.060.30 Washers, locking elements

21.060.40 Rivets

21.060.50 Pins, nails

21.060.60 Rings, bushes, sleeves, collars

21.060.70 Clamps and staples

21.060.99 Other fasteners

21.080 Hinges, eyelets and other articulated joints

21.100 Bearings

21.100.01 Bearings in general

21.100.10 Plain bearings

21.100.20 Rolling bearings

21.120 Shafts and couplings

21.120.01 Shafts and couplings in general

21.120.10 Shafts

21.120.20 Couplings

21.120.30 Keys and keyways, splines

21.120.40 Balancing and balancing machines

21.120.99 Other standards related to shafts and couplings

21.140 Seals, glands (see also 23.040.80)

21.160 Springs (see also 77.140.25)

21.180 Housings, enclosures, other machine parts

21.200 Gears

21.220 Flexible drives and transmissions

21.220.01 Flexible drives and transmissions in general

21.220.10 Belt drives and their components

21.220.20 Cable or rope drives and their components

21.220.30 Chain drives and their components

21.220.99 Other flexible drives and transmissions

21.240 Rotary-reciprocating mechanisms and their parts (including pistons, piston-rings, crankshafts, etc. for general engineering)

21.260 Lubrication systems (see also 75.100)

23 Fluid systems and components for general use

23.020 Fluid storage devices (see also 55.140 and 75.200-10)

23.020.01 Fluid storage devices in general

23.020.10 Stationary containers and tanks

23.020.20 Vessels and containers mounted on vehicles (see also 43.080.10, 45.060.20, 47.060.20, 47.020.85 and 55.140)

23.020.30 Gas pressure vessels, gas cylinders (see also 27.060.30 and 77.140.30)

23.020.40 Cryogenic vessels

23.020.99 Other fluid storage devices

23.040 Pipeline components and pipelines (see also 75.200)

23.040.01 Pipeline components and pipelines in general

23.040.10 Iron and steel pipes (see also 77.140.75)

23.040.15 Non-ferrous metal pipes (see also 77.150)

23.040.20 Plastics pipes (see also 83.140.30)

23.040.40 Metal fittings

23.040.45 Plastics fittings

23.040.50 Pipes and fittings of other materials

23.040.60 Flanges, couplings and joints

23.040.70 Hoses and hose assemblies

23.040.80 Seals for pipe and hose assemblies

23.040.99 Other pipeline components

23.060 Valves

23.060.01 Valves in general

23.060.10 Globe valves

23.060.20 Ball and plug valves

23.060.30 Gate valves

23.060.40 Pressure regulators (including pressure-reducers, see also 13.240)

23.060.50 Check valves

23.060.99 Other valves

23.080 Pumps (see also 23.100.10 and 23.160)

23.100 Fluid power systems

23.100.01 Fluid power systems in general

23.100.10 Pumps and motors

23.100.20 Cylinders

23.100.40 Piping and couplings

23.100.50 Control components (including valves)

23.100.60 Filters, seals and contamination of fluids (see also 75.120)

23.100.99 Other fluid power system components

23.120 Ventilators. Fans. Air-conditioners (see also 47.020.90, 73.100.20 and 91.140.30)

23.140 Compressors and pneumatic machines

23.160 Vacuum technology (including vacuum pumps)

25 Manufacturing engineering (This group includes standards for general use)

25.020 Manufacturing forming processes

25.040 Industrial automation systems (see also 35.240.50)

25.040.01 Industrial automation systems in general

25.040.10 Machining centres

25.040.20 Numerically controlled machines

25.040.30 Industrial robots. Manipulators

25.040.40 Industrial process measurement and control

25.040.99 Other industrial automation systems

25.060 Machine tool systems

25.060.01 Machine tool systems in general

25.060.10 Modular units and other devices

25.060.20 Dividing and tool-workpiece holding devices

25.060.99 Other machine tool systems

25.080 Machine tools (see also 79.120.10)

25.080.01 Machine tools in general

25.080.10 Lathes

25.080.20 Boring and milling machines

25.080.25 Planing machines

25.080.30 Broaching machines

25.080.40 Drilling machines

25.080.50 Grinding and polishing machines

25.080.60 Sawing machines

25.080.99 Other machine tools

25.100 Cutting tools (including industrial diamonds, see also 79.120.20)

25.100.01 Cutting tools in general

25.100.10 Turning tools

25.100.20 Milling tools

25.100.25 Tools for planing and broaching machines

25.100.30 Drills, countersinks, reamers

25.100.40 Saws

25.100.50 Taps and threading dies

25.100.60 Files

25.100.70 Abrasives

25.100.99 Other cutting tools

25.120 Chipless working equipment

25.120.01 Chipless working equipment in general

25.120.10 Forging equipment. Presses. Shears

25.120.20 Rolling, extruding and drawing equipment

25.120.30 Moulding equipment

25.120.40 Electrochemical machines

25.120.99 Other chipless working equipment

25.140 Hand-held tools (see also 13.260)

25.140.01 Hand-held tools in general

25.140.10 Pneumatic tools

25.140.20 Electric tools (see also 65.060.80)

25.140.30 Hand-operated tools (including wrenches, screwdrivers, pliers, nippers, hammers, etc.)

25.140.99 Other hand-held tools

25.160 Welding, brazing and soldering (including gas welding, electric welding, plasma welding, electron beam welding, plasma cutting, etc.)

25.160.01 Welding, brazing and soldering in general (including welders' qualifications, see also 03.100.30)

25.160.10 Welding processes (including thermal cutting and cladding)

25.160.20 Welding consumables (including electrodes, filler metals, gases, etc.)

25.160.30 Welding equipment (including thermal cutting equipment)

25.160.40 Welded joints and welds (including welding position and mechanical and non-destructive testing of welded joints, see also 19.100)

25.160.50 Brazing and soldering (including brazing and soldering alloys and equipment)

25.180 Industrial furnaces

25.180.01 Industrial furnaces in general

25.180.10 Electric furnaces

25.180.20 Fuel furnaces

25.200 Heat treatment

25.220 Surface treatment and coating (including processes and equipment for surface treatment and coating, see also 25.200, 49.040, 77.060 and 87.020)

25.220.01 Surface treatment and coating in general

25.220.10 Surface preparation (including surface preparation for painting, cleaning, scouring, blasting, etc.)

25.220.20 Surface treatment (including anodization, conversion coating, thermal spraying, etc.)

25.220.40 Metallic coatings (including electrolytic depositions, cathodic coatings, autocatalytic coatings, etc.)

25.220.50 Enamels

25.220.60 Organic coatings

25.220.99 Other treatments and coatings

27 Energy and heat transfer engineering

27.010 Energy and heat transfer engineering in general

27.020 Internal combustion engines (This group includes standards for general use, see also 29.160.40, 43.060 and 47.020.20)

27.040 Gas and steam turbines. Steam engines

27.060 Burners. Boilers

27.060.01 Burners and boilers in general (see also 91.140.10)

27.060.10 Liquid and solid fuel burners

27.060.20 Gas fuel burners

27.060.30 Boilers and heat exchangers (including steam pressure vessels, see also 71.120.30, 75.180.20 and 97.100)

27.070 Fuel cells

27.075 Hydrogen technologies (see also 71.100.20)

27.080 Heat pumps

27.100 Power stations in general (including thermal power plants, see also 27.120.20, 27.140, 27.160 and 27.180)

27.120 Nuclear energy engineering

27.120.01 Nuclear energy in general

27.120.10 Reactor engineering

27.120.20 Nuclear power plants. Safety (see also 13.280)

27.120.30 Fissile materials and nuclear fuel technology (including raw materials, see also 13.030.30)

27.120.99 Other standards related to nuclear energy

27.140 Hydraulic energy engineering (including hydraulic turbines)

27.160 Solar energy engineering (including photovoltaic energy systems)

27.180 Wind turbine energy systems (including generation of electrical energy)

27.190 Biological sources and alternative sources of energy

27.200 Refrigerating technology (see also 23.120, 71.100.45, 97.040.30 and 97.130.20)

27.220 Heat recovery. Thermal insulation (This group includes standards for general use, see also 91.120.10)

29 Electrical engineering

29.020 Electrical engineering in general (including voltages, general electrical terminology, electrical documentation, electrical tables, safety, fire hazard testing, etc., see also 01.100.25, 27.100 and 33.100)

29.030 Magnetic materials (see also 77.140.40)

29.035 Insulating materials

29.035.01 Insulating materials in general

29.035.10 Paper and board insulating materials

29.035.20 Plastics and rubber insulating materials (including adhesive tapes)

29.035.30 Glass and ceramic insulating materials

29.035.50 Mica based materials

29.035.60 Varnished fabrics

29.035.99 Other insulating materials

29.040 Insulating fluids

29.040.01 Insulating fluids in general

29.040.10 Insulating oils

29.040.20 Insulating gases

29.040.99 Other insulating fluids

29.045 Semiconducting materials

29.050 Superconductivity and conducting materials

29.060 Electrical wires and cables

29.060.01 Electrical wires and cables in general

29.060.10 Wires (including electric rods, busbars, etc.)

29.060.20 Cables

29.080 Insulation (see also 29.035 and 29.040)

29.080.01 Electrical insulation in general

29.080.10 Insulators (including fittings and other components for insulators)

29.080.20 Bushings

29.080.30 Insulation systems

29.080.99 Other standards related to insulation

29.100 Components for electrical equipment (see also 31)

29.100.01 Components for electrical equipment in general

29.100.10 Magnetic components

29.100.20 Electric and electromechanical components

29.100.99 Other components for electrical equipment

29.120 Electrical accessories

29.120.01 Electrical accessories in general

29.120.10 Conduits for electrical purposes

29.120.20 Connecting devices

29.120.30 Plugs, socket-outlets, couplers

29.120.40 Switches

29.120.50 Fuses and other overcurrent protection devices

29.120.70 Relays

29.120.99 Other electrical accessories

29.130 Switchgear and controlgear

29.130.01 Switchgear and controlgear in general

29.130.10 High voltage switchgear and controlgear (including enclosed switchgear and controlgear)

29.130.20 Low voltage switchgear and controlgear (including switchgear and controlgear assemblies)

29.130.99 Other switchgear and controlgear

29.140 Lamps and related equipment

29.140.01 Lamps in general

29.140.10 Lamp caps and holders

29.140.20 Incandescent lamps

29.140.30 Fluorescent lamps. Discharge lamps

29.140.40 Luminaires

29.140.50 Lighting installation systems (including supply track systems)

29.140.99 Other standards related to lamps

29.160 Rotating machinery

29.160.01 Rotating machinery in general

29.160.10 Components for eletrical rotating machines

29.160.20 Generators

29.160.30 Motors

29.160.40 Generating sets

29.160.99 Other standards related to eletrical rotating machinery

29.180 Transformers. Reactors (see also 17.220.20)

29.200 Rectifiers. Converters. Stabilized power supply (including semiconductor converters)

29.220 Galvanic cells and batteries

29.220.01 Galvanic cells and batteries in general

29.220.10 Primary cells and batteries

29.220.20 Acid secondary cells and batteries

29.220.30 Alkaline secondary cells and batteries

29.220.99 Other cells and batteries

29.240 Power transmission and distribution networks (see also 91.140.50)

29.240.01 Power transmission and distribution networks in general (see also 33.040.60)

29.240.10 Substations. Surge arresters

29.240.20 Power transmission and distribution lines

29.240.30 Control equipment for electric power systems (see also 17.220.22)

29.240.99 Other equipment related to power transmission and distribution networks (including capacitors for power networks)

29.260 Electrical equipment for working in special conditions

29.260.01 Electrical equipment for working in special conditions in general

29.260.10 Electrical installations for outdoor use

29.260.20 Electrical apparatus for explosive atmospheres

29.260.99 Other electrical equipment for working in special conditions

29.280 Electric traction equipment (including railway electric fixed installations, see also 43.120 and 45.060.10)

31 Electronics

31.020 Electronic components in general (see also 29.100.10)

31.040 Resistors

31.040.01 Resistors in general

31.040.10 Fixed resistors

31.040.20 Potentiometers, variable resistors

31.040.30 Thermistors

31.040.99 Other resistors

31.060 Capacitors

31.060.01 Capacitors in general

31.060.10 Fixed capacitors

31.060.20 Ceramic and mica capacitors

31.060.30 Paper and plastics capacitors

31.060.40 Tantalum electrolytic capacitors

31.060.50 Aluminium electrolytic capacitors

31.060.60 Variable capacitors

31.060.70 Power capacitors (see also 29.240.99)

31.060.99 Other capacitors

31.080 Semiconductor devices (see also 29.045)

31.080.01 Semiconductor devices in general

31.080.10 Diodes

31.080.20 Thyristors

31.080.30 Transistors

31.080.99 Other semiconductor devices

31.100 Electronic tubes

31.120 Electronic display devices (including liquid crystal displays)

31.140 Piezoelectric devices

31.160 Electric filters

31.180 Printed circuits and boards

31.190 Electronic component assemblies (including preassembled modules)

31.200 Integrated circuits. Microelectronics (including electronic chips, logical and analogue microstructures, see also 35.160)

31.220 Electromechanical components for electronic and telecommunications equipment

31.220.01 Electromechanical components in general

31.220.10 Plug-and-socket devices. Connectors

31.220.20 Switches

31.220.99 Other electromechanical components

31.240 Mechanical structures for electronic equipment

31.260 Optoelectronics. Laser equipment (including photoelectric tubes and cells)

33 Telecommunications. Audio and video engineering

33.020 Telecommunications in general (including infrastructure)

33.030 Telecommunication services. Applications (including supplementary services, service aspects and associated legal tracability aspects)

33.040 Telecommunication systems (including network (system) aspects)

33.040.01 Telecommunication systems in general

33.040.20 Transmission systems (including synchroniz ation, cable systems, integrated cabling, pathways and multiplexing)

33.040.30 Switching and signalling systems (including telecommunication call charging and billing aspects)

33.040.35 Telephone networks (including Public Switched Telephone Networks (PSTN), Private Telecommunication Networks (PTN) and Private Integrated Service Networks (PISN))

33.040.40 Data communication networks (including Packet Switched Public Data Networks (PSPDN) and Ethernet, see also 33.080, 35.110 and 35.080)

33.040.50 Lines, connections and circuits (including access networks and network elements)

33.040.60 Powerline telecommunications (see also 29.240.01)

33.040.99 Other equipment for telecommunication systems

33.050 Telecommunication terminal equipment

33.050.01 Telecommunication terminal equipment in general

33.050.10 Telephone equipment

33.050.20 Paging equipment