ASTM RR-D02-1651 2008 PDF

Full title and description

ASTM Research Report RR:D02-1651 — Interlaboratory study report supporting Test Method D6378: "Test Method for Determination of Vapor Pressure (VPX) of Petroleum Products, Hydrocarbons, and Hydrocarbon‑Oxygenate Mixtures (Triple Expansion Method)". The report documents the interlaboratory program, participating laboratories, test protocol and the statistical precision statement produced for D6378.

Abstract

This research report presents the results of an interlaboratory study performed to establish a precision (repeatability and reproducibility) statement for ASTM Test Method D6378 (VPX, triple expansion). The study was carried out by multiple laboratories (eight laboratories reported in the study) using a set of prepared samples (twelve samples) and includes raw data, statistical analysis, outlier diagnostics, and an r/R precision statement.

General information

• Status: Research report (cataloged/available); listed as active/available in distributor records.
• Publication date: October 15, 2008 (RR:D02-1651 — 2008).
• Publisher: ASTM International (published as an ASTM Research Report associated with Committee D02 activities).
• ICS / categories: Petroleum and related technologies; test methods and interlaboratory precision (ICS code commonly used for D6378: 75.080).
• Edition / version: RR:D02-1651 (2008) — single research report edition associated with the 2008 timeframe.
• Number of pages: 69 pages (report length as listed in product/catalog records).

Scope

This research report documents an interlaboratory study conducted to determine the precision characteristics (repeatability and reproducibility) of the automated VPX triple expansion procedure described in ASTM D6378. It includes the ILS protocol, sample preparation and distribution, participating laboratories and equipment descriptions, complete test data sets, statistical treatment (including consistency checks and outlier analysis) and the derived precision statement to be used with D6378. The report is intended to support the statistical basis for precision claims in the D6378 test method.

Key topics and requirements

• Design and conduct of the interlaboratory study (ILS) for D6378 — protocol, number/type of samples, and laboratory instructions.
• Raw data presentation from participating laboratories and instrumentation notes for VPX (triple expansion) measurements.
• Statistical analysis to produce repeatability (r) and reproducibility (R) limits, including consistency checks and outlier handling (approaches consistent with ASTM interlaboratory practice).
• Discussion of applicability and limitations of the precision statement (sample types, vapor‑to‑liquid ratios, temperature/pressure ranges referenced by D6378).
• Recommendations for users and for inclusion of the precision statement in the D6378 test method documentation.

Typical use and users

Primary users are petroleum and fuel laboratories, instrument manufacturers and calibration laboratories, producers and blenders of gasoline and hydrocarbon‑oxygenate blends, regulatory agencies and standards committees who require validated precision statements for VPX measurements. The report is used when applying or referencing the precision limits for D6378 results in interlaboratory comparisons, quality control, and regulatory compliance testing.

Related standards

Directly related: ASTM D6378 (Test Method for Determination of Vapor Pressure (VPX), triple expansion) — the research report provides the ILS precision support for this test method. Also related are general ASTM practices for ILS and precision reporting such as ASTM E691 (Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method) and other vapor‑pressure related methods like D5191 (DVPE correlation reference).

Keywords

ASTM RR:D02-1651, research report, interlaboratory study, precision statement, repeatability, reproducibility, VPX, vapor pressure, D6378, triple expansion, petroleum testing, fuel blends.

FAQ

Q: What is this standard?

A: RR:D02-1651 is an ASTM Research Report (2008) that documents an interlaboratory study performed to establish the precision statement for Test Method D6378 (VPX triple expansion). It is a supporting report rather than a standalone test specification.

Q: What does it cover?

A: It covers the ILS design and execution, test data from participating laboratories, statistical analysis (including outlier checks) and the derived repeatability and reproducibility limits that support the precision clause of ASTM D6378.

Q: Who typically uses it?

A: Fuel testing laboratories, instrument manufacturers, method developers, quality/assurance personnel and standards committees use this report to apply and interpret precision limits for VPX measurements performed under D6378.

Q: Is it current or superseded?

A: The research report itself is dated 2008 (RR:D02-1651) and remains an archival ILS document. The D6378 test method it supports has had subsequent revisions (for example later editions such as D6378-20 are available); users should consult ASTM International for the current active version of D6378 and any later ILS or precision updates.

Q: Is it part of a series?

A: It is part of the D02 (petroleum products, liquid fuels, and lubricants) research report series (RR:D02) used to document interlaboratory studies and precision statements for D02 test methods. Other RR:D02 reports serve the same purpose for different D02 standards.

Q: What are the key keywords?

A: VPX, vapor pressure, triple expansion, D6378, interlaboratory study, precision, repeatability, reproducibility, ASTM research report.