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ASTM D5705-20
Standard Test Method for Measurement of Hydrogen Sulfide in the Vapor Phase Above Residual Fuel Oils
NORMA vydaná dňa 1.10.2020
Informácie o norme:
Označenie normy: ASTM D5705-20
Dátum vydania normy: 1.10.2020
Kód tovaru: NS-1006766
Počet strán: 6
Približná hmotnosť: 18 g (0.04 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM D5705-20 :
Keywords:
hydrogen sulfide, length-of-stain detector tube, residual fuel oil,, ICS Number Code 75.160.20 (Liquid fuels)
Doplňujúce informácie
| Significance and Use | ||||||||
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5.1 Residual fuel oils can contain H5.1.1 The measurement of H5.2 This test method was developed to provide refineries, fuel terminals and independent testing laboratories, which do not have access to analytical instruments such as a gas chromatograph, with a simple and consistent field test method for the rapid determination of H2S in the vapor phase above residual fuel oils. Note 1: D5705 is one of
three test methods for quantitatively measuring H2S in residual fuels:
1) Test Method D6021 is an analytical test method to determine H2S levels in the liquid phase. 2) Test Method D7621 is a rapid test method to determine H2S levels in the liquid phase. Note 2: Because of the reactivity, absorptivity and volatility
of H5.3 This test method does not necessarily
simulate the vapor phase H2S concentration in a fuel
storage tank. It does, however, provide a level of consistency so
that the test result is only a function of the residual fuel oil
sample and not the test method, operator, or location. No general
correlation can be established between this field test and actual
vapor phase concentrations of H2S in residual fuel oil storage
or transports. However, a facility that produces fuel oil from the
same crude source under essentially constant conditions might be
able to develop a correlation for its individual case.
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| 1. Scope | ||||||||
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1.1 This test method covers the field determination of hydrogen sulfide (H2S) in the vapor phase (equilibrium headspace) of a residual fuel oil sample. 1.2 The test method is applicable to liquids with a viscosity range of 5.5 mm2/s at 40 °C to 50 mm2/s at 100 °C. The test method is applicable to fuels conforming to Specification D396 Grade Nos. 4, 5 (Heavy), and 6. 1.3 The applicable range is from 5 μmol/mol to 4000 μmol/mol (micromoles per mole) (5 ppm v/v to 4000 ppm v/v (parts per million by volume)). 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||||||||
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