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ASTM D3238-95(2015)
Standard Test Method for Calculation of Carbon Distribution and Structural Group Analysis of Petroleum Oils by the n-d-M Method
Automaticky preložený názov:
Štandardná skúšobná metóda na výpočet Carbon Distribúcia a analytickej skupiny Štruktúrny minerálnych olejov u NDM metódou
NORMA vydaná dňa 1.10.2015
Informácie o norme:
Označenie normy: ASTM D3238-95(2015)
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.10.2015
Kód tovaru: NS-621973
Počet strán: 2
Približná hmotnosť: 6 g (0.01 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM D3238-95(2015) :
Keywords:
carbon distribution, density, molecular weight, petroleum oils , refractive index, ring content,, ICS Number Code 75.080 (Petroleum products in general)
Doplňujúce informácie
| Significance and Use | ||||||||||||||
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4.1 The carbon distribution and ring content serve to express the gross composition of the heavier fractions of petroleum. These data can be used as an adjunct to the bulk properties in monitoring the manufacture of lubricating oil base stocks by distillation, solvent refining or hydrogenation, or both, and in comparing the composition of stocks from different crude sources. Furthermore, the data can often be correlated with critical product performance properties. |
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| 1. Scope | ||||||||||||||
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1.1 This test method covers the calculation of the carbon distribution and ring content (Note 1) of olefin-free petroleum oils from measurements of refractive index, density, and molecular weight (n-d-M).2 This test method should not be applied to oils whose compositions are outside the following ranges: 1.1.1 In terms of carbon distribution—up to 75 % carbon atoms in ring structure; percentage in aromatic rings not larger than 1.5 times the percentage in naphthenic rings. 1.1.2 In terms of ring content—up to four rings per molecule with not more than half of them aromatic. A correction must be applied for oils containing significant quantities of sulfur. Note 1: The composition of complex petroleum fractions is
often expressed in terms of the proportions of aromatic rings
(1.2 The values stated in SI units are to
be regarded as the standard. The values in parentheses are for
information only.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use. |
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| 2. Referenced Documents | ||||||||||||||
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