ISO 18611-2-2014 PDF

Full title and description

ISO 18611-2:2014 — Ships and marine technology — Marine NOx reduction agent AUS 40 — Part 2: Test methods. Specifies the test methods required to determine the quality characteristics of the AUS 40 aqueous urea solution used as a NOx reduction agent in marine SCR systems.

Abstract

ISO 18611-2:2014 defines normative test procedures for the determination of AUS 40 quality characteristics as referenced in ISO 18611-1. The part covers laboratory and analytical methods used to verify chemical and physical properties and to support quality control, precision and dispute resolution for AUS 40 supplied for marine applications.

General information

• Status: Published (confirmed after systematic review; current edition confirmed in 2020).
• Publication date: October 2014 (Edition 1, 2014‑10).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.020.99 (environmental protection — other), 47.020.99 (shipbuilding and marine structures — other).
• Edition / version: Edition 1 (2014).
• Number of pages: 44 pages.

Scope

This part of ISO 18611 specifies the test methods required for determination of the quality characteristics of the marine NOx reduction agent AUS 40 (aqueous urea solution, nominally 40 % m/m) as defined in ISO 18611‑1. It provides normative procedures for sampling, analytical determinations and precision statements used for acceptance testing, supplier certification and dispute resolution in marine applications.

Key topics and requirements

• Normative sampling procedures and sampling annex for representative laboratory samples of AUS 40.
• Analytical methods for urea content (e.g., by total nitrogen combustion and by refractive index) and associated reference procedures.
• Physical-property determinations: density (referencing ISO 3675 / ISO 12185), refractive index and temperature control requirements.
• Chemical impurity assays and limits: alkalinity, biuret, aldehydes, phosphate, insoluble matter and selected trace metals (methods and limits referenced in annexes).
• Precision, repeatability and reproducibility statements (precision guidance follows ISO 4259 principles; dispute-resolution procedures included).
• Informative identification techniques (e.g., FTIR) and references to analytical instrumentation (ICP‑OES, photometry, combustion analysis) where applicable.

Typical use and users

AUS 40 producers, distributors and quality-control laboratories use ISO 18611‑2 to validate product quality and certificates of analysis. Shipbuilders, engine and SCR-system OEMs, ship operators, port laboratories and regulatory or inspection bodies use the standard to verify incoming shipments, to specify procurement requirements and to resolve quality disputes. Analytical labs adopt the annex test methods for routine compliance testing.

Related standards

ISO 18611 is a multipart series: ISO 18611‑1:2014 (Quality requirements for AUS 40) and ISO 18611‑3:2014 (Handling, transportation and storage) are the directly related parts. For analogous terrestrial applications and cross‑reference test methods, the ISO 22241 series (AUS 32 / diesel NOx reduction agent) contains comparable test methods and precision statements (e.g., ISO 22241‑2:2019 — Test methods for AUS 32).

Keywords

AUS 40, aqueous urea solution, NOx reduction agent, SCR, ships, marine, test methods, sampling, urea content, biuret, aldehydes, refractive index, density, ISO 18611.

FAQ

Q: What is this standard?

A: ISO 18611‑2:2014 is the part of the ISO 18611 series that specifies laboratory test methods for determining the quality characteristics of AUS 40, the 40 % aqueous urea NOx reduction agent used in marine SCR systems.

Q: What does it cover?

A: It covers sampling procedures, specific analytical methods (urea content, refractive index, density, alkalinity, biuret, aldehydes, insoluble matter, selected trace elements, etc.), precision and dispute-resolution guidance and annexes with normative test procedures.

Q: Who typically uses it?

A: AUS 40 manufacturers and distributors, ship and SCR OEMs, analytical laboratories, ship operators and inspection bodies use it for quality control, acceptance testing and regulatory or contractual verification.

Q: Is it current or superseded?

A: The 2014 edition (Edition 1) is published and was confirmed following ISO's 2020 review — the ISO catalogue shows this edition as current/confirmed as of the 2020 review. Users should check ISO or their national standards body for any later revisions after systematic review dates.

Q: Is it part of a series?

A: Yes — ISO 18611 is a multipart standard. Part 1 specifies quality requirements (ISO 18611‑1:2014) and Part 3 covers handling, transportation and storage (ISO 18611‑3:2014).

Q: What are the key keywords?

A: AUS 40, marine urea solution, NOx reduction agent, SCR, test methods, sampling, urea determination, refractive index, density, biuret, aldehydes.