MÉTODO |
TÍTULO
|
NBR/ISO 1000
|
Unidades SI e recomendações para o uso dos seus múltiplos e de algumas outras unidades
|
NBR 14903
|
Gás natural – Determinação da composição por cromatografia gasosa
|
NBR 15213
|
Cálculo do poder calorífico, densidade, densidade relativa e índice de Wobbe de combustíveis gasosos a partir da composição
|
MÉTODO |
TÍTULO
|
ASTM D 1945
|
STM for analysis of natural gas by gas chromatography
|
ASTM D 3588
|
Standard practice for calculating heat value, compressibility factor, and relative density (specific gravity) of gaseous fuels
|
ASTM D 5454
|
STM for water vapor content of gaseous fuels using electronic moisture analyzers
|
ASTM D 5504
|
STM for determination of sulfur compounds in natural gas and gaseous fuels by gas chromatography and chemiluminescence
|
ASTM D 6228
|
STM for determination of sulfur compounds in natural gas and gaseous fuels by gas chromatography and flame photometric detection
|
MÉTODO |
TÍTULO
|
ISO 6326-1
|
Natural gas – Determination of sulfur compounds, Part 1: General introduction
|
ISO 6326-3
|
Natural gas – Determination of sulfur compounds, Part 3: Determination of hydrogen sulfide, mercaptan sulfur and carbonyl sulfide sulfur by potentiometry
|
ISO 6326-5
|
Natural gas – Determination of sulfur compounds, Part 5: Lingener combustion method
|
ISO 6327
|
Gas analysis – Determination of water dew point of natural gas – Cooled surface condensation hygrometers
|
ISO 6570
|
Natural gas – Determination of Potential Hydrocarbon Liquid Content
|
ISO 6974-1
|
Natural gas – Determination of composition with defined uncertainty by gas chromatography, Part 1: Guidelines for tailored analysis
|
ISO 6974-3
|
Natural gas – Determination of composition with defined uncertainty by gas chromatography, Part 3: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide, and hydrocarbons up to C8 using two packed columns
|
ISO 6974-5
|
Natural gas – Determination of composition with defined uncertainty by gas chromatography, Part 5: Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using three columns
|
ISO 6974-6
|
Natural gas – Determination of composition with defined uncertainty by gas chromatography, Part 6: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons using three capillary columns
|
ISO 6975
|
Natural gas – Extended analysis – Gas chromatographic method
|
ISO 6976
|
Natural gas – Calculation of calorific values, density, relative density and Wobbe index from composition
|
ISO 6978-1
|
Natural gas – Determination of mercury, Part 1: Sampling of mercury by chemisorption on iodine
|
ISO 6978-2
|
Natural gas – Determination of mercury, Part 2: Sampling of mercury by amalgamation on gold/platinum alloy
|
ISO 10101-1
|
Natural gas – Determination of water by the Karl Fischer method – Part 1: Introduction
|
ISO 10101-2
|
Natural gas – Determination of water by the Karl Fischer method – Part 2: Titration procedure
|
ISO 10101-3
|
Natural gas – Determination of water by the Karl Fischer method – Part 3: Coulometric procedure
|
ISO 10715
|
Natural gas – Sampling Guidelines
|
ISO 11541
|
Natural gas – Determination of water content at high pressure
|
ISO 13686
|
Natural gas – Quality Designation
|
ISO 15403
|
Natural gas – Designation of the quality of natural gas for use as a compressed fuel for vehicles. Part 1 to 2.
|
ISO 18453
|
Natural gas – Correlation between water content and water dew point
|
ISO 19739
|
Natural gas – Determination of sulfur compounds using gas chromatography
|
ISO 23874
|
Natural gas – Gas chromatographic requirements for hydrocarbon dewpoint calculation
|
CARACTERÍSTICA |
UNIDADE
|
LIMITE (2) (3)
|
|
MÉTODO
|
|||
|
|
Norte
|
Nordeste
|
Centro-Oeste, Sudeste e Sul
|
NBR
|
ASTM D
|
ISO
|
Poder calorífico superior (4)
|
kJ/ m³
|
34.000 a 38.400
|
35.000 a 43.000
|
15213
|
3588
|
6976
|
|
|
kWh/m³
|
9,47 a 10,67
|
9,72 a 11,94
|
|
|
|
|
Índice de Wobbe (5)
|
kJ/m³
|
40.500 a 45.000
|
46.500 a 53.500
|
15213
|
--
|
6976
|
|
Número de metano, mín. (6)
|
|
(3)
|
65
|
--
|
--
|
15403
|
|
Metano, mín.
|
% mol.
|
68,0
|
85,0
|
14903
|
1945
|
6974
|
|
Etano, máx.
|
% mol.
|
12,0
|
12,0
|
14903
|
1945
|
6974
|
|
Propano, máx.
|
% mol.
|
3,0
|
6,0
|
14903
|
1945
|
6974
|
|
Butanos e mais pesados, máx.
|
% mol.
|
1,5
|
3,0
|
14903
|
1945
|
6974
|
|
Oxigênio, máx. (7)
|
% mol.
|
0,8
|
0,5
|
14903
|
1945
|
6974
|
|
Inertes (N2+CO2), máx.
|
% mol.
|
18,0
|
8,0
|
6,0
|
14903
|
1945
|
6974
|
CO2, máx.
|
% mol.
|
3,0
|
14903
|
1945
|
6974
|
||
Enxofre Total, máx. (8)
|
mg/m3
|
70
|
--
|
5504
|
6326-3
|
||
|
|
|
|
|
|
|
6326-5
|
|
|
|
|
|
|
|
19739
|
Gás Sulfídrico (H2S), máx.
|
mg/m3
|
10
|
13
|
10
|
--
|
5504
|
6326-3
|
|
|
|
|
|
|
6228
|
|
Ponto de orvalho de água a 1atm, máx. (9)
|
ºC
|
-39
|
-39
|
-45
|
--
|
5454
|
6327
|
|
|
|
|
|
|
|
10101-2
|
|
|
|
|
|
|
|
10101-3
|
|
|
|
|
|
|
|
11541
|
Ponto de orvalho de hidrocarbonetos a 4,5 MPa, máx. (10)
|
2012 | Meu Posto de Combustível - Todos os direitos reservados
|