ASTM D1267 Test Method for Gage Vapor Pressure of Liquefied Petroleum (LP) Gases (LP-Gas Method)
11. Report
11.1 Report the LP-Gas vapor pressure test results in terms of kilopascals to the nearest 5 kPa or pounds per square inch, to the nearest 0.5 psi gage, the test temperature, and reference this test method.
12. Precision and Bias
12.1 The following shall be used as a basis for judging the acceptability of results (95 % probability).
12.1.1 Repeatability - The difference between two test results, obtained by the same operator with the same apparatus under constant operating conditions on identical test materials would in the normal and correct operation of the test method, exceed the following value only in one case in twenty:
12 kPa (1.8 psi)
12.1.2 Reproducibility - The difference between two single and independent results obtained by different operators working in different laboratories on identical test material would in the long run, in the normal and correct operation of the test method, exceed the following value only in one case in twenty:
19 kPa (2.8 psi)
12.2 Bias - The procedure in this test method for measuring vapor pressure has no bias because the value of vapor pressure is defined only in terms of this test method.
13. Keywords
13.1 natural gas liquids; liquefied petroleum gases; vapor pressure
