ISO 2744-1998 PDF

Full title and description

St ISO 2744-1998 — Vitreous and porcelain enamels — Determination of resistance to boiling water and water vapour. This International Standard specifies test procedures to assess the behaviour of vitreous and porcelain enamel coatings when exposed to boiling water and to the vapour of boiling water, for the purpose of quality control and conformity assessment of enamelled articles.

Abstract

ISO 2744:1998 (third edition) provides a laboratory test method for evaluating the resistance of vitreous and porcelain enamels to boiling water and its vapour. The standard defines specimen preparation, test apparatus and exposure conditions, and gives criteria for the assessment of coating changes (for example blistering, crazing, loss of adhesion or other visible deterioration) after exposure. The 1998 edition has since been withdrawn and its subject matter incorporated into later ISO work on chemical-corrosion resistance of enamels.

General information

• Status: Withdrawn (replaced by later ISO work on enamel corrosion resistance).
• Publication date: March 1998 (3rd edition, published 1998-03-15).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.220.50 (Enamels).
• Edition / version: 3 (1998).
• Number of pages: 6.

Scope

This standard specifies a method to determine the resistance of vitreous and porcelain enamel coatings on articles to the action of boiling water and the vapour of boiling water. It is intended for use on enamelled products where contact with hot water or steam may occur in service or during processing; the test evaluates changes to the coating such as blistering, crazing, softening or loss of adhesion after prescribed exposure and cooling cycles. The 1998 publication addressed laboratory conditions, specimen size and conditioning, exposure duration and evaluation procedures.

Key topics and requirements

• Definition of test specimens and preparation (surface cleaning, cutting/edge treatment and mounting where required).
• Specification of test apparatus (boiling-water bath, vapour exposure arrangement and temperature control).
• Exposure conditions (time periods for immersion and vapour exposure, temperature = boiling point, and number of cycles).
• Post‑exposure assessment criteria — visual inspection and description of defects such as blistering, crazing, loss of enamel, discoloration or other deterioration.
• Classification or pass/fail guidance based on severity of observed changes (typical laboratory acceptance levels used for quality control of enamel coatings).
• Notes on reporting test conditions and results to ensure reproducibility and comparability between laboratories.

Typical use and users

ISO 2744:1998 was intended for quality-control laboratories, enamel manufacturers, coating applicators, product designers and purchasers who need to verify the behaviour of vitreous and porcelain enamels when exposed to boiling water or steam. It is also used by testing houses and conformity assessment bodies when assessing enamelled consumer goods, cookware, sanitaryware and industrial enamelled components.

Related standards

ISO 2744:1998 has been withdrawn and its subject matter has been incorporated into later ISO standards covering chemical corrosion and resistance tests for enamels — notably ISO 28706-2:2008 (Determination of resistance to chemical corrosion — Part 2: boiling acids/neutral liquids and their vapours), which is cited as the successor work. Other related enamel test standards in the same series cover resistance to boiling citric acid, condensing acid vapours, hot alkaline solutions and release from enamelled articles in contact with food.

Keywords

ISO 2744, vitreous enamel, porcelain enamel, boiling water test, water vapour, enamel resistance, coating test, corrosion resistance, enamelled articles, test method.

FAQ

Q: What is this standard?

A: ISO 2744:1998 is an International Standard titled "Vitreous and porcelain enamels — Determination of resistance to boiling water and water vapour" that specified a laboratory test method for assessing enamel behaviour when exposed to boiling water and its vapour.

Q: What does it cover?

A: It covers specimen preparation, test apparatus and exposure conditions for boiling-water and vapour tests, plus criteria for evaluating resultant coating defects such as blistering, crazing, loss of adhesion and other visible deterioration.

Q: Who typically uses it?

A: Enamel manufacturers, product designers, quality-control and test laboratories, conformity-assessment bodies and purchasers of enamelled goods use (or used) this standard to verify enamel performance under hot-water/steam exposure.

Q: Is it current or superseded?

A: ISO 2744:1998 has been withdrawn. Its test methods and subject matter have been superseded by later ISO work on resistance of enamels to chemical corrosion, notably ISO 28706-2:2008 and related parts; users should consult the current ISO standards in the enamel corrosion/resistance series for up-to-date test procedures.

Q: Is it part of a series?

A: Yes — it formed part of a set of ISO test standards dealing with vitreous and porcelain enamels (various parts addressing acids, alkalies, vapours and other media). The subject has since been reorganized into the ISO 28706 series and other related standards for enamel testing.

Q: What are the key keywords?

A: Vitreous enamel, porcelain enamel, boiling water, water vapour, corrosion resistance, test method, enamelled articles, ISO 2744.