ASTM D5705-20 PDF

Full title and description

ASTM D5705-20 — Standard Test Method for Measurement of Hydrogen Sulfide in the Vapor Phase Above Residual Fuel Oils. A short, field-oriented procedure for determining hydrogen sulfide (H2S) concentration in the equilibrium headspace (vapor phase) above residual fuel oil samples to support product quality checks and occupational safety assessments.

Abstract

This standard specifies a simple, repeatable field test method to measure hydrogen sulfide (H2S) in the vapor (headspace) above residual fuel oils. It defines the sample applicability (residual fuel oil grades), the measurable concentration range, and basic operational limits, enabling refineries, terminals, and field laboratories to rapidly assess potential H2S hazards without requiring complex analytical instruments.

General information

• Status: Active
• Publication date: October 2020 (D5705-20; last ASTM update October 8, 2020)
• Publisher: ASTM International
• ICS / categories: 75.160.20 (Petroleum products and related technologies)
• Edition / version: D5705-20 (2020)
• Number of pages: 6

Scope

The test method covers field determination of hydrogen sulfide (H2S) in the equilibrium vapor phase (headspace) of residual fuel oil samples. It applies to residual fuel oils with viscosity roughly in the range 5.5 mm²/s at 40 °C to 50 mm²/s at 100 °C (fuel grades D396 Nos. 4, 5 (Heavy), and 6). The measurable concentration range is approximately 5 μmol/mol to 4000 μmol/mol (about 5 ppm v/v to 4000 ppm v/v). The method provides consistent, sample‑focused results for quality control and safety screening but does not by itself address all workplace safety controls or guarantee headspace concentrations in full storage tanks under varying conditions.

Key topics and requirements

• Purpose: field measurement of H2S in the vapor (headspace) above residual fuel oils.
• Applicability: residual fuel oil Grades 4–6 (per Specification D396) within specified viscosity range.
• Concentration range: about 5 μmol/mol (5 ppm v/v) to 4000 μmol/mol (4000 ppm v/v).
• Test type: rapid, low‑instrumentation field method intended for consistent headspace sampling.
• Comparative context: complements liquid‑phase methods (e.g., D6021, D7621) — not a replacement for detailed laboratory analysis when required.
• Safety note: users must follow site safety procedures; measured headspace concentration is a snapshot and may not correlate directly to tank conditions without site‑specific evaluation.

Typical use and users

This standard is used by refinery and blending personnel, fuel terminal operators, bunker/ship operators, independent testing laboratories, and occupational health & safety teams who need a rapid field assessment of potential H2S vapor hazards or a quick product quality screen when gas chromatographs or full laboratory facilities are not available.

Related standards

Commonly referenced standards and specifications include ASTM D6021 and ASTM D7621 (liquid‑phase/rapid liquid H2S test methods) and ASTM D396 (specification for fuel oils). D5705 is issued under the ASTM D02 committee framework that covers fuel and lubricants test methods.

Keywords

hydrogen sulfide, H2S, headspace, vapor phase, residual fuel oil, field test, fuel oil safety, D5705-20, ASTM, headspace measurement, fuel grade D396

FAQ

Q: What is this standard?

A: ASTM D5705-20 is a field test method that specifies how to measure hydrogen sulfide (H2S) concentration in the vapor (equilibrium headspace) above residual fuel oils.

Q: What does it cover?

A: It covers procedures and applicability limits for a rapid headspace H2S determination on residual fuel oil samples (applicable viscosity/fuel grades and a measurement range of roughly 5 to 4000 ppm v/v), plus guidance on scope and limitations.

Q: Who typically uses it?

A: Refineries, fuel terminals, independent testing labs, ship and bunker operators, and health & safety personnel who need a quick field assessment of potential H2S vapor exposure or a sample quality check.

Q: Is it current or superseded?

A: It is current as ASTM D5705-20 (issued October 2020). It supersedes earlier editions (for example, D5705-15 and prior versions).

Q: Is it part of a series?

A: It is part of the suite of ASTM D02 fuel and lubricant test methods and is frequently used alongside related H2S methods (D6021, D7621) and fuel specifications such as D396.

Q: What are the key keywords?

A: hydrogen sulfide, H2S, headspace measurement, residual fuel oil, field test, fuel safety, D5705-20.