VietnameseDecree No. 134/2007/ND-CP dated August 15, 2007 of the Government providing for official units of measurement
ATTRIBUTE
| Issuing body: | Government | Effective date: | Known Please log in to a subscriber account to use this function. Don’t have an account? Register here |
| Official number: | 134/2007/ND-CP | Signer: | Nguyen Tan Dung |
| Type: | Decree | Expiry date: | Known Please log in to a subscriber account to use this function. Don’t have an account? Register here |
| Issuing date: | 15/08/2007 | Effect status: | Known Please log in to a subscriber account to use this function. Don’t have an account? Register here |
| Fields: | Others |
THE GOVERNMENT | SOCIALIST REPUBLIC OF VIETNAM |
No. 134/2007/ND-CP | Hanoi, August 15, 2007 |
DECREE
PROVIDING FOR OFFICIAL UNITS OF MEASUREMENT
THE GOVERNMENT
Pursuant to the Law on Government organization dated December 25, 2001;
Pursuant to the Ordinance on Measurement dated October 06, 1999;
At the request of the Minister of Science and Technology,
DECREES:
Chapter 1:
GENERAL PROVISIONS
Article 1. Scope of regulation
This Decree providing official measurement units regulated by the Socialist Republic of Vietnam.
Article 2. Interpretation of terms
In this Decree, these terms can be construed as follows:
1. The SI system is the international system of units (in French: Le Système International d Unités; in English: The International System of Units).
2. Official measurement units are the units specified in Article 7 and Article 8 of this Decree.
3. Other common measurement units are the units that are not mentioned in clause 2 of this Article, including traditional units and other measurement units.
Article 3. Rules for the use of measurement units
1. Official measurement units are compulsory in these following cases:
a) In the documents promulgated by a regulatory agency, except for the application of International Agreement as prescribed in Article 5 of this Decree;
b) On the measurement instruments used for the examination, inspection and other public services;
c) On the labels of quantitatively prepackaged products subject to examination according to the regulations in the Ordinance on Measurement;
d) In the manufacture, trade, import of measurement instruments subject to examination according to the Ordinance on Measurement.
2. Other common measurement units may be used in the activities other than the cases specified in clause 1 of this Article.
The conversion from a common measurement unit into an official measurement unit is expressed according to Article 4 of this Decree.
3. The state shall encourage organizations and individuals to use the official measurement units according to the regulations in this Decree.
Article 4. The conversion from the common units into the official measurement units
1. The conversion shall not lead to any change in the value of quantity.
2. The conversions from other common measurement units into official measurement units are regulated in Annex I enclosed herewith.
If a conversion from a common measurement unit into an official measurement unit is not specified in Annex I of this Decree, then the equivalent of the traditional measurement units shall be used in accordance with the Encyclopaedic Dictionary of Vietnam, the equivalent of other common measurement shall be in accordance with The International System of Units (SI) – 8th edition, 2006 by the Bureau International des Poids et Mesures (BIPM).
3. When expressing the values, the common quantities, values and units shall go after the official ones and shall be put in the brackets.
Ex: One (01) tael of gold shall be expressed as follow: 37,5 g (1 tael).
Article 5. The application of the International Agreement
If the Socialist Republic of Vietnam accedes an International Agreement on measurement units whose regulation is different from this Circular, such International Agreement shall prevail.
Article 6. The expression of official measurement units
The expression of measurement results, the conversion from a common measurement unit into an official measurement unit shall be in accordance with the regulation in Annex II enclosed herewith.
Chapter 2:
THE OFFICIAL MEASUREMENT UNITS
Article 7. The SI units
The SI units include:
1. SI base units specified in Table 1.
Table 1
No. | Quantity | Unit name | Unit symbol |
1 | length | metre | m |
2 | mass | kilogram | kg |
3 | time | second | s |
4 | electric current | ampere | A |
5 | thermodynamic temperature | kelvin | K |
6 | amount of substance | mole | mol |
7 | luminous intensity | candela | cd |
2. The derived units specified in table 2.
Table 2
No. | Quantity | Unit | Expression in terms of SI base units | |
Name | Symbol | |||
1. Units of space, time and the circulation | ||||
1.1 | plane angle (angle) | radian | rad | m/m |
1.2 | solid angle | steradian | sr | m2/m2 |
1.3 | area | square metre | m2 | m.m |
1.4 | volume | cubic metre | m3 | m.m.m |
1.5 | frequency | hertz | Hz | s-1 |
1.6 | angular velocity | radian per second | rad/s | s-1 |
1.7 | angular acceleration | radian per second squared | rad/s2 | s-2 |
1.8 | speed | metre per second | m/s | m.s-1 |
1.9 | acceleration | metre per second squared | m/s2 | m.s-2 |
2. Mechanical units | ||||
2.1 | linear mass density (linear density) | kilogram per metre | kg/m | kg.m-1 |
2.2 | area density (surface density) | kilogram per square metre | kg/m2 | kg.m-2 |
2.3 | mass density (density) | kilogram per cubic metre | kg/m3 | kg.m-3 |
2.4 | force | newton | N | m.kg.s-2 |
2.5 | torque (moment of force) | newton metre | N.m | m2.kg.s-2 |
2.6 | pressure, stress | pascal | Pa | m-1.kg.s-2 |
2.7 | dynamic viscosity | pascal second | Pa×s | m-1.kg.s-1 |
2.8 | kinematic viscosity | square metre per second | m2/s | m2.s-1 |
2.9 | work, engergy | joule | J | m2.kg.s-2 |
2.10 | power | watt | W | m2.kg.s-3 |
2.11 | volumetric flow | cubic metre per second | m3/s | m3.s-1 |
2.12 | mass flow | kilogram per second | kg/s | kg.s-1 |
3. Units for the measurement of temperature | ||||
3.1 | degree Celsius | degree Celsius | °C | t = T - T0; where t is degree Celsius, T is thermodynamic temperature and T0= 273,15. |
3.2 | calorific value | joule | J | m2.kg.s-2 |
3.3 | specific energy | joule per kilogram | J/kg | m2.s-2 |
3.4 | heat capacity | joule per kelvin | J/K | m2.kg.s-2.K-1 |
3.5 | specific heat capacity | joule per kilogram kelvin | J/(kg×K) | m2.s-2.K-1 |
3.6 | heat flux | watt | W | m2.kg.s-3 |
3.7 | surface heat flux (heat flux density) | watt per square metre | W/m2 | kg.s-3 |
3.8 | thermal transmittance | watt per square metre kelvin | W/m2×K | kg.s-3.K-1 |
3.9 | thermal conductivity | watt per metre kelvin | W/(m×K) | m.kg.s-3.K-1 |
3.10 | thermal diffusivity | square metre per second | m2/s | m2.s-1 |
4. Units for the measurement of electric and magnetic | ||||
4.1 | quantity of electricity (electric charge) | coulomb | C | s.A |
4.2 | voltage, electrical potential difference, electromotive force | volt | V | m2.kg.s-3.A-1 |
4.3 | electric field strength | volt per metre | V/m | m.kg.s-3.A-1 |
4.4 | electrical resistance | ohm | W | m2.kg.s-3.A-2 |
4.5 | electrical conductance | siemens | S | m-2.kg-1.s3.A2 |
4.6 | electric flux | coulomb | C | s.A |
4.7 | electric flux density | coulomb per square metre | C/m2 | m-2.s.A |
4.8 | work, energy | joule | J | m2.kg.s-2 |
4.9 | magnetic field strength | ampere per metre | A/m | m-1.A |
4.10 | electrical capacitance | farad | F | m-2.kg-1.s4.A2 |
4.11 | inductance | henry | H | m2.kg.s-2.A-2 |
4.12 | magnetic flux | weber | Wb | m2.kg.s-2.A-1 |
4.13 | magnetic flux density, magnetic induction | tesla | T | kg.s-2.A-1 |
4.14 | magnetomotive force | ampere | A | A |
4.15 | power | watt | W | m2.kg.s-3 |
4.16 | apparent power | volt ampere | V.A | m2.kg.s-3 |
4.17 | reactive power | var | var | m2.kg.s-3 |
5. Units for the measurement of light and electromagnetic radiation | ||||
5.1 | radiant energy | joule | J | m2.kg.s-2 |
5.2 | radiant power (radiant flux) | watt | W | m2.kg.s-3 |
5.3 | radiant intensity | watt per steradian | W/sr | m2.kg.s-3 |
5.4 | spectral radiance | watt per steradian square metre | W/(sr×m2) | kg.s-3 |
5.5 | radiant emittance | watt per square metre | W/m2 | kg.s-3 |
5.6 | irradiance | watt per square metre | W/m2 | kg.s-3 |
5.7 | luminance | candela per square metre | cd/m2 | m-2.cd |
5.8 | luminous flux | lumen | lm | cd |
5.9 | luminous energy | lumen second | lm×s | cd.s |
5.10 | luminous emittance | lumen per square metre | lm/m2 | m-2.cd |
5.11 | illuminance | lux | lx | m-2.cd |
5.12 | luminous exposure | lux second | lx×s | m-2.cd.s |
5.13 | optical power | diopter | diopter | m-1 |
6. Measurement units of sound | ||||
6.1 | sound frequency | hertz | Hz | s-1 |
6.2 | sound pressure | pascal | Pa | m-1.kg.s-2 |
6.3 | speed of sound | metre per second | m/s | m.s-1 |
6.4 | sound energy density | joule per cubic metre | J/m3 | m-1.kg.s-2 |
6.5 | sound energy | watt | W | m2.kg.s-3 |
6.6 | sound intensity | watt per square metre | W/m2 | kg.s-3 |
6.7 | acoustic impedance | pascal second per cubic metre | Pa×s/m3 | m-4.kg.s-1 |
6.8 | viscous damping | newton second per cubic metre | N×s/m | kg.s-1 |
7. Units for the mesurement of physical and chemical molecule | ||||
7.1 | atomic mass | kilogram | kg | kg |
7.2 | molecular mass | kilogram | kg | kg |
7.3 | molar concentration | mole per cubic metre | mol/m3 | kg |
7.4 | molar energy | joule per mole | J/mol | m-3.mol |
7.5 | catalytic activity | katal | kat | m2.kg.s-2.mol-1 |
8. Measurement units of ionizing radiation | ||||
8.1 | radioactivity (activity) | becquerel | Bq | s-1 |
8.2 | absorbed dose, kerma | gray | Gy | m2.s-2 |
8.3 | dose equivalent | sievert | Sv | m2.s-2 |
8.4 | exposure | coulomb per kilogram | C/kg | kg-1.s.A |
3. Decimal multiples and submultiples of SI units:
a) The names and symbols of the decimal multiples and submultiples of SI units are formed by attaching prefix names and prefix symbols to names and symbols of the original units
b) Names and symbols of SI prefixes and the multiplying factors are specified in Table 3
Table 3
Name | Symbol | Multiplying factor | |
International use | Vietnamese use | ||
The multiple | |||
yotta | yôtta | Y | 1 000 000 000 000 000 000 000 000 = 1024 |
zetta | zetta | Z | 1 000 000 000 000 000 000 000 = 1021 |
exa | exa | E | 1 000 000 000 000 000 000 = 1018 |
peta | peta | P | 1 000 000 000 000 000 = 1015 |
tera | tera | T | 1 000 000 000 000 = 1012 |
giga | giga | G | 1 000 000 000 = 109 |
mega | mega | M | 1 000 000 = 106 |
kilo | kilô | k | 1 000 = 103 |
hecto | hectô | h | 100 = 102 |
deca | deca | da | 10 = 101 |
The submultiple | |||
deci | deci | d | 0,1 = 10-1 |
centi | centi | c | 0,01 = 10‑2 |
mili | mili | m | 0,001 = 10-3 |
micro | micrô | m | 0,000 001 = 10-6 |
nano | nanô | n | 0,000 000 001 = 10-9 |
pico | picô | p | 0,000 000 000 001 = 10-12 |
femto | femtô | f | 0,000 000 000 000 001 = 10-15 |
atto | attô | a | 0,000 000 000 000 000 001 = 10-18 |
zepto | zeptô | z | 0,000 000 000 000 000 000 001 = 10-21 |
yocto | yoctô | y | 0,000 000 000 000 000 000 000 001 = 10-24 |
c) Compound prefix names or symbols are not permitted for the formation of decimal multiples or submultiples of an official SI unit.
Ex: nanometer: 1 nm or 10-9m, not: millimicrometre: mµm.
Where nano is name; n is its symbol and 10-9is its multiplying factor.
Note: This rule does not apply to the kilogram. For historical reasons, the name “kilogram” contains the prefix name “kilo” to the name “gram”. Thus, decimal multiples and submultiples of the kilogram are formed by attaching the SI prefixes for gram.
Article 8. The measurement units outside the SI (non-SI units)
The measurement units outside the SI include:
1. The measurement units in conformity with international practice specified in Table 4.
Table 4
No. | Quantity | Measurement units in conformity with international practice | Value | Note | ||||
Name | Symbol | In international practice | In SI unit system | |||||
1 | plane angle | degree | o | 1o | (p/180) rad |
| ||
minute |
| 1 = (1/60)o | (p/10 800) rad |
| ||||
second | " | 1" = (1/60) | (p/648 000) rad |
| ||||
2 | volume | litre | L or l | 1 L | 1 dm3 | Decimal submultiples may be formed according to clause 3 Article 7 of this Decree. | ||
3 | time | minute | min | 1 min | 60 s |
| ||
hour | h | 1 h = 60 min | 3 600 s |
| ||||
day | d | 1 d = 24 h | 86 400 s |
| ||||
4 | mass | tonne | t | 1 t | 1 000 kg | Decimal multiples may be formed according to clause 3 Article 7 of this Decree. | ||
unified atomic mass unit | u | 1 u | 1,660 538 86.10-27kg |
| ||||
5 | pressure | bar | bar | 1 bar | 100 000 Pa | Decimal submultiples and multiples may be formed according to clause 3 Article 7 of this Decree. | ||
6 | work, energy | watt hour | W.h | 1 W.h | 3 600 J | Decimal submultiples and multiples may be formed according to clause 3 Article 7 of this Decree. | ||
electronvolt | eV | 1 eV | 1,602 177.10-19J | Decimal submultiples and multiples may be formed according to clause 3 Article 7 of this Decree. | ||||
7 | frequency level | octave | octave | 1 octave | _ | lg2(f2/f1) = lg22 | ||
8 | loudness level | phon | phon | 1 phon | _ | With regard to monochrome sound, at 1 kHz, loudness in phons and dB are the same. | ||
9. Logarithmic quantities | ||||||||
9.1 | Level-of-a-field-quantity | neper | Np | 1 Np | _ | ln (F/Fo) = ln e | ||
bel | B | 1 B | _ | ln (F/Fo) = 2 lg101/2B | ||||
decibel | dB | 1 dB | _ | 1 dB = (1/10) B | ||||
9.2 | Level-of-a-power-quantity | neper | Np | 1 Np | _ | (1/2) ln (P/Po) = (1/2) lne2 | ||
bel | B | 1 B | _ | (1/2) ln (P/Po) = lg 10 B | ||||
decibel | dB | 1 dB | _ | 1 dB = (1/10) B | ||||
2. The specialized measurement units specified Table 5.
Table 5
No. | Quantity | The specialized measurement units | Value | Purpose | ||
Name | Symbol | Value in particular filed | Value in SI unit system | |||
1 | area | hectare | ha | 1 ha | 10 000 m2 | Particularly used for the measurement of land. |
barn | b | 1 b | 10-28m2 | Particularly used in nuclear physics and radioactivity | ||
2 | frequency | round per second | r/s | 1 r/s
| 1 Hz
| Particularly used for the measurement of the frequency of circular motion |
round per minute | r/min | 1 r/min
| 1/60 Hz
| Particularly used for the measurement of the frequency of circular motion | ||
3 | pressure | millimetre of mercury | mmHg
| 1 mmHg
| 133,322 Pa
| Particularly used for the measurement of blood pressure |
4 | calorific value | calorie | cal | 1 cal | 4,186 8 J | Particularly used as a unit of food energy |
5 | mass | carat | ct | 1 ct
| 0,2 g
| Particularly used for the measurement of gemstones and pearls |
3. Measurement units that are formed based on the combination of the units specified in Article 7 (ex: km/s); the units specified in clause 1 of this Article (ex: L/min); the units specified in Article 7 and clause 1 of this Article (ex: kg/min).
4. The measurement units other than the units specified in Article 7, clause 1, 2, 3 Article 8 of this Decree but accepted by multiple countries.
Chapter 3:
RESPONSIBILITIES OF REGULATORY AGENCIES, ORGANIZATIONS AND INDIVIDUALS
Article 9. Responsibilities of the Ministry of Science and Technology
1. The Ministry of Science and Technology has a responsibility towards the Government for the consistency of the management in the official measurement units according to the regulations in this Decree.
2. The Ministry of Science and Technology shall take lead, cooperate with relevant Ministries and regulatory bodies in:
a) Organizing the implementation of the regulations on measurement units in this Decree;
b) Conducting scientific researches, trainings, international cooperation relating to the official measurement units; informing, propagating the knowledge relating to the application of official measurement units regulated in this Decree;
c) Inspecting, examining the implementation of the regulation on the official measurement units in this Decree;
d) Taking lead, cooperating with the Ministry of Finance in the management of budget and the investment in technical ability and facilities of national measurement system.
Article 10. Responsibilities of Ministries and regulatory bodies
1. Comply with the regulation on the official measurement units prescribed in this Decree when making legislative documents.
2. Monitor, provide guidance and conduct the examination on the use of measurement instruments, the expression of measurement results that are expressed in accordance with the measurement units in the activities under the management of Ministries and regulatory bodies according to the regulation on measurement units prescribed in this Decree.
3. Take lead, cooperating with the Ministry of Finance and the Ministry of Science and Technology in the management of budget, the investment in technical ability and facilities of national measurement system.
Article 11. Responsibilities of People’s Committees of provinces
1. Comply with the regulation on the official measurement units prescribed in this Decree when making legislative and administrative documents.
2. Within their functions and competence, People’s Committees of provinces shall:
a) Provide monitor and guidance for local regulatory agencies, organizations and individuals on the implementation of the regulation on the official measurement units according to the regulations in this Decree.
b) Conduct the inspection and examination in the administrative division on the implementation of the regulations on official measurement units according to the regulations in this Decree
3. Manage the budget; invest in technical ability and facilities of national measurement system under the authority.
Article 12. Responsibilities of organizations and individuals
1. Organizations and individuals shall implement the regulations on official measurement units in this Decree in the use of measurement instruments, the expression of measurement results that are expressed in accordance with the measurement units in the manufacture, trade and import of measurement instruments subject to evaluation, in the production of the labels of quantitatively prepackaged products subject to examination according to the regulation in the Ordinance on Measurement.
2. With regard to foreign organization/individual importing goods from Vietnam, if the requirements for measurement noted in the contract are different from the regulation in this Decree and comply with the regulations of the importing countries as well as the regulations of Vietnam and such organization/individual takes responsibility for the requirements, then the contract may be carried out.
Article 4:
IMPLEMENTATION
Article 13. Effect
1. This Decree takes effect since the 16th day after the day on which it is placed on the official gazette. This Decree replaces the Decree No. 65/2001/ND-CP dated September 28, 2001 by the Government on the official measurement units of the Socialist Republic of Vietnam .
2. The products and measurement instruments containing other common measurement units that are written or carved exist before the day on which this Decree takes effect may be kept using for the cases prescribed in clause 1 Article 3 of this Decree.
3. If the measurement instruments prescribed in clause 2 of this Article are directly used for the cases prescribed in clause 1 Article 3 of this Decree, the measurement results must be converted according to the regulation in Article 4 and expressed according to the regulation in Article 6 of this Decree.
Article 14. Implementation
1. The Minister of Science and Technology is responsible for the organization for the implementation of this Decree.
2. The Ministers, Heads of ministerial-level agencies, Heads of Governmental agencies, the Presidents of People’s Committees of provinces are responsible for the implementation of this Decree./.
| ON BEHAFT OF THE GOVERNMENT |
ANNEX I
THE CONVERSION FROM THE COMMON UNITS INTO THE OFFICIAL MEASUREMENT UNITS
(Enclosed with the Decree No. 134/2007/ND-CP dated August 15, 2007 by the Government)
No. | The other measurement units | Value | Note | ||
Name | Symbol | Value in other common measurement units | Value in official measurement units | ||
1 | Mass |
|
|
|
|
1.1 | quintal | q | 1 q | 100 kg |
|
1.2 | pound | lb | 1 lb | 0,453 5924 kg |
|
1.3 | ounce | oz | 1 oz | 28,349 52 g |
|
1.4 | tael | tael | 1 tael | 37,5 g | mass of gold, silver (traditional measurement units) |
mace | mace | 1 mace | 3,75 g | ||
candareen | candareen | 1 candareen | 0,375 g | ||
1.5 | tex | tex | 1 tex | 0,000 001 kg.m-1 | linear density |
1.6 | kilogram per litre | kg/L | 1 kg/L | 1 kg/dm3 | density |
1.7 | tonne per square metre | t/m3 | 1 t/m3 | 1 000 kg/m3 | density |
2 | Length |
|
|
|
|
2.1 | Ångström |
| 1 | 0,1 nm |
|
2.2 | nautical mile | n. mile | 1 n. mile | 1 852 m | nautical mile |
2.3 | mile | mile, mi | 1 mile = 1 mi | 1 609,344 m | mile |
2.4 | inch | in | 1 in | 2,54 cm |
|
2.5 | foot | ft | 1 ft | 0,3048 m |
|
2.6 | yard | yd | 1 yd | 0,9144 m |
|
2.7 | light year | l.y. | 1 l.y. | 9,460 73.1015m | light year |
3 | Area |
|
|
|
|
3.1 | square inch | in2 | 1 in2 | 6,4516 cm2 | square inch |
3.2 | square mile | mile2, mi2 | 1 mile2=1 mi2 | 2,589 988 km2 | square mile |
3.3 | square foot | ft2 | 1 ft2 | 9,290 304 dm2 | square foot |
3.4 | square yard | yd2 | 1 yd2 | 0,836 1274 m2 | square yard |
3.5 | are | a | 1 a | 100 m2 |
|
3.6 | “mẫu” (the North and the Central parts of Vietnam) | “mẫu” | 1 “mẫu” (North part)= 10 sào (North part) | 3 600 m2 | Units of land area (traditional units) |
1 “mẫu” (Central part) = 10 sào (Central part) | 4 999,5 m2 | ||||
“sào“ (Bắc Bộ “sào“ (the North and the Center parts of Vietnam) | “sào” | 1“sào“(North part) = 15“thước“(Central part) | 360 m2 | ||
1 “sào“ (Central part) = 15 “thước“ (Central part) | 499,95 m2 | ||||
“thước“ (the North and the Center parts of Vietnam) | “thước“ | 1 “thước“ (North part) | 24 m2 | ||
1“thước“(Central part) | 33,33 m2 | ||||
“mẫu“ (South part) | “mẫu“ | 1“mẫu“= 10“công“ | 12 960 m2 | ||
“công“(South part) | “công“ | 1 công | 1 296 m2 | ||
4 | Volume |
|
|
|
|
4.1 | cubic inch | in3 | 1 in3 | 16,387 06 cm3 | cubic inch |
4.2 | cubic foot | ft3 | 1 ft3 | 28,316 85 dm3 | cubic foot |
4.3
| gallon | gal | 1 gal | 4,546 09 dm3 | British gallon |
1 gal | 3,785 412 dm3 | US gallon | |||
4.4
| fluid ounce | fl.oz | 1 fl.oz 1 fl.oz | 28,413 06 cm3 29,573 53 cm3 | British fluid ounce US fluid ounce |
4.5 | barrel | bbl | 1 bbl | 0,158 9873 m3 | barrel |
4.6 | stere | st | 1 st | 1 m3 | amount of timber |
5 | Temperature |
|
|
|
|
5.1 | Fahrenheit degree | OF | 1OF | 5/9 K | oF = (K-273,15) .1,8+ 3,2 |
6 | Work, energy |
|
|
| |
6.1 | kilogram force metre | kgf.m | 1 kgf.m | 9,806 65 J |
|
6.2 | thermal unit | Btu | 1 Btu | 1 055,06 J |
|
6.3 | horsepower | hp | 1 hp | 745,7 W | horsepower (British) |
cv | 1 cv | 735,499 W | horsepower (metric unit) | ||
7 | Viscosity, strain |
|
|
| |
7.1 | poise centipoise | P cP | 1 P 1 cP | 0,1 Pa.s 1 mPa.s = 0,001 Pa.s | viscosity motive power |
7.2 | stocker centistocker | St cSt | 1 St 1 cSt | 0,0001 m2/s 1 mm2/s | viscosity kinetics |
7.3 | dyne per centimetre | dyn/cm | 1 dyn/cm | 0,001 N/m |
|
8 | Force, torque (moment of force) |
|
|
| |
8.1 | kilogram force | kgf, kG, kp | 1 kgf = 1 kG = 1 kp | 9,806 65 N |
|
8.2 | kilogram force metre | kgf.m | 1 kgf.m | 9,806 65 N.m |
|
8.3 | dyne | dyn | 1 dyn | 0,000 01 N |
|
8.4 | dyne centimetre | dyn.cm | 1 dyn.cm | 10-7N.m |
|
9 | Pressure, stress |
|
|
| |
9.1 | standard atmosphere | atm | 1 atm | 101 325 Pa |
|
9.2 | technical atmosphere | at | 1 at | 98 066,5 Pa |
|
9.3 | dyne per square centimetre | dyn/cm2 | 1 dyn/cm2 | 0,1 Pa |
|
9.4 | kilogram force per square centimetre | kgf/cm2 kG/cm2 kp/cm2 | 1 kgf/cm2 = 1 kG/cm2 = 1 kp/cm2 | 98 066,5 Pa |
|
9.5 | torr | Torr | 1 Torr | 133,322 Pa |
|
9.6 | metres of water gauge | mH2O | 1 mH2O | 9 806,65 Pa |
|
9.7 | millimetres of water gauge | mmH2O | 1 mmH2O | 9,806 65 Pa |
|
9.8 | pound-force per square inch | psi | 1 psi | 6 894,757 Pa | pound-force per square inch |
9.9 | kilopound-force per square inch inch vuông | ksi | 1 ksi | 6 894 757 Pa | kilopound-force per square inch |
9.10 | inch of mercury | inHg | 1 inHg | 3 376,85 Pa | inch of mercury (60oF) |
9.11 | inch of water | inH2O | 1 inH2O | 248,84 Pa | inch of water (60oF) |
9.12 | foot of mercury | ftHg | 1 ftHg | 40 636,66 Pa | foot of mercury, conventional |
9.13 | foot of water | ftH2O | 1 ftH2O | 2 988,98 Pa | foot of water (39,2oF) |
10 | Speed, acceleration |
|
|
| |
10.1 | foot per minute | ft/min | 1 ft/min | 0,005 08 m/s | foot per minute |
10.2 | mile per hour | mi/h, mile/h | 1 mi/h = 1 mile/h | 1,609 344 km/h | mile per hour |
10.3 | round per minute | r/min, rpm | 1 r/min = 1 rpm | 0,104 7198 rad/s |
|
10.4 | standard acceleration of free fall | gn | 1gn | 9,806 65 m/s2 | acceleration of free fall, standard |
10.5 | foot per second square | ft/s2 | 1 ft/s2 | 0,3048 m/s2 | foot per second square |
10.6 | gal | Gal | 1 Gal | 0,01 m/s2 |
|
10.7 | inch per second square | in/s2 | 1 in/s2 | 0,0254 m/s2 | inch per second square |
11 | Quantity of electricity |
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|
|
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11.1 | faraday | faraday | 1 faraday | 96 485,31 C |
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12 | Radiation |
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12.1 | stilb | sb | 1 sb | 10 000 cd/m2 | luminance |
12.2 | curie | Ci | 1 Ci | 3,7.1010Bq | radioactivity |
12.3 | rad | rad | 1 rad | 0,01 Gy | absorbed dose |
12.4 | rem | rem | 1 rem | 0,01 Sv | equivalent dose |
12.5 | roentgen | R | 1 R | 0,000 258 C/kg | exposure |
ANNEX II
WRITING OFFICIAL UNITS OF MEASUREMENT
(Enclosed with the Decree No. 134/2007/ND-CP dated August 15, 2007 by the Government)
The official measurement units shall be written as follows:
1. Names and symbols of a unit shall be printed in a consistent style (only name or only symbol of the unit).
Ex: Kilometre/hour or km/h, not kilometer/h or km/hour.
2. Names of units shall be printed in upright type and start with a lower-case letter, including the units derived form proper names, except for Celsius degree.
Ex: metre, second, ampere, kelvin, pascal,…
3. Names of units shall be printed in upright type and start with a lower-case letter, except for the litre (L)
Ex: m, s…
If the name of unit is derived from a proper name, the first character of the symbol must be an upper-case letter.
Ex: A, K, Pa…
4. The official measurement units must not be attached any affixes or other symbols.
Ex: “We” must not be used as a symbol of power instead of W.
5. Multiplication must be indicated by a dot (.).
Ex: The unit of resistance power is metre kelvin per watt: m.K/W (where m is the symbol of metre), apart from millikelvin per watt: mK/W (where m is the SI prefix milli)
6. Division is indicated by a horizontal line, by a solidus (oblique stroke, /) or by negative exponents.
Ex:
or m/s or m.s-1for metre per second.
When several unit symbols are combined, the symbols shall be put in brackets or negative exponents shall be used.
Ex: J/(kg.K); m.kg/(s3.A) or J.kg-1.K-1; m.kg.S-3.A-1.
7. The value of a quantity shall be expressed as the product of a number and a unit. A space is left between the
numerical value and the unit symbol.
Ex: 22 m, not 22m or 22 m.
Note 1: The symbol of Celsius degree shall not include any space between the degree symbol (o) and the Celsius symbol (C).
Ex: 15oC, not 15oC or 15oC.
Note 2: The symbol of plane angles that iso(degree);¢(minute);²(second) shall not include any space between the quantity value and the symbol (o); (¢); (²).
Ex: 15o20¢30¢¢,not 15o20¢30¢¢or 15o20¢30¢¢.
Note 3: When express quantity value by operation, the unit symbols shall be preceded by the numbers or the brackets containing the numbers of the operation.
Ex: 12 m – 10 m = 2 m or (12-10) m, not 12 m – 10 = 2 m or 12 – 10 m = 2 m.
12 m x 12 m x 12 m or (12 x 12 x 12) m, not 12 x 12 x 12 m.
23oC ± 2oC or (23 ± 2)oC, not : 23 ± 2oC or 23oC ± 2
Note 4: Comma (,) shall be used as the decimal mark of the quantity value, not point (.)
Ex: 245,12 mm, not 245.12 mm
VIETNAMESE DOCUMENTS
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ENGLISH DOCUMENTS
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