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  • ASTM D1837 Standard Test Method for Volatility of Liquefied Petroleum (LP) Gases ASTM D1837 Standard Test Method for Volatility of Liquefied Petroleum (LP) Gases7. Interpretation of Results7.1 Correct the thermometer at the 95 % boiling point (5 % residue) for the thermometer error (6.7).7.2 Correct the observed temperature for the thermometer error from the observed atmospheric ...
  • ASTM D1837 Standard Test Method for Volatility of Liquefied Petroleum (LP) Gases ASTM D1837 Standard Test Method for Volatility of Liquefied Petroleum (LP) Gases6. Procedure6.1 Positioning the Thermometer - Add water to the 5 mL line of the weathering tube. Add two grains of charcoal. Insert the armored thermometer as low as possible into the weathering tube. Observe and record the ...
  • ASTM D1837 Standard Test Method for Volatility of Liquefied Petroleum (LP) Gases ASTM D1837 Standard Test Method for Volatility of Liquefied Petroleum (LP) Gases5. Apparatus5.1 Weathering Tube - A centrifuge tube, cone-shaped, conforming to the dimensions given in Fig. 1 and made of thoroughly annealed heat-resistant glass. The shape of the lower tip of the tube is especially important. ...
  • ASTM D1837 Standard Test Method for Volatility of Liquefied Petroleum (LP) Gases ASTM D1837 Standard Test Method for Volatility of Liquefied Petroleum (LP) Gases3. Summary of Test Method3.1 Refrigerate the sample by means of a cooling coil and collect 100 mL of liquid in a weathering tube. Allow to evaporate ("weather") at ambient pressure under specified conditions that approximate ...
  • ASTM D1837 Standard Test Method for Volatility of Liquefied Petroleum (LP) Gases ASTM D1837 Standard Test Method for Volatility of Liquefied Petroleum (LP) Gases1. Scope1.1 This test method is a measure of the relative purity of the various types of liquefied petroleum (LP) gases and helps to ensure suitable volatility performance. The test results, when properly related to vapor ...
  • ASTM D4893 Standard Test Method for Determination of Pitch Volatility ASTM D4893 Standard Test Method for Determination of Pitch Volatility9. Precision9.1 Repeatability - Duplicate values by the same operator shall not be considered suspect unless they differ by more than 0.2 %.9.2 Reproducibility - The values reported by each of two laboratories representing the arithmetic ...
  • ASTM D4893 Standard Test Method for Determination of Pitch Volatility ASTM D4893 Standard Test Method for Determination of Pitch Volatility8. Procedure8.1 Weigh 15 g of prepared sample into a tared aluminum weighing dish with precision of 0.1 mg.8.2 Start nitrogen purge system at a rate 10 cm3/min +/- 0.1 cm3/min (10 mL/min +/- 0.1 mL/min).8.3 Place top block onto bottom ...
  • ASTM D4893 Standard Test Method for Determination of Pitch Volatility ASTM D4893 Standard Test Method for Determination of Pitch Volatility5. Dehydration of Sample5.1 Hard Pitch - If the solid bulk sample contains free water, air-dry a representative portion in a forced-draft oven at 50°C (122°F).5.2 Soft Pitch (Softening Point <60°C (<140°F)) - If the presence ...
  • ASTM D4893 Standard Test Method for Determination of Pitch Volatility ASTM D4893 Standard Test Method for Determination of Pitch Volatility4. Apparatus4.1 Aluminum Block, 4 1/2-in. outside diameter, composed of two sections (Figs. 1-4).4.1.1 The top block is maintained at a chosen constant temperature according to the signal from the thermocouple inserted into the thermowell ...
  • ASTM D4893 Standard Test Method for Determination of Pitch Volatility ASTM D4893 Standard Test Method for Determination of Pitch Volatility1. Scope1.1 This test method covers the determination of the percent of pitch volatility.1.2 Since this test method is empirical, strict adherence of the procedure is necessary.1.3 This standard does not purport to address all of the ...