ISO 49-1994 amd1-2018 PDF

Full title and description

ISO 49:1994/Amd 1:2018 — Malleable cast iron fittings threaded to ISO 7-1 — Amendment 1: Chemical composition of the zinc coating — adjustment to actual requirements regarding hazardous substances. This amendment updates the chemical limits and related requirements for zinc coatings applied to malleable cast iron threaded fittings to better align with contemporary restrictions on hazardous substances and to clarify coating composition and testing expectations for manufacturers and conformity assessment bodies.

Abstract

This amendment revises the allowable elemental composition (trace elements) in zinc coatings for malleable cast iron fittings threaded to ISO 7‑1, and updates normative references and testing/inspection cross-references where necessary. Its purpose is to reduce or control the presence of hazardous elements in coatings while keeping fit-for-service properties for plumbing and industrial piping fittings.

General information

• Status: Published (amendment to ISO 49:1994).
• Publication date: 24 April 2018.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 23.040.40 — Metal fittings.
• Edition / version: Amendment 1 (2018) to ISO 49:1994 (second edition).
• Number of pages: Amendment document: 2 pages (ISO amendment). The base ISO 49:1994 standard (second edition) is 38 pages.

Scope

Applies to malleable cast iron fittings with threads manufactured to ISO 7‑1. The amendment specifically addresses the chemical composition requirements for zinc coatings applied to these fittings — defining maximum permissible mass percentages for certain trace elements (e.g., Pb, Cd, As, Bi, Sb, Cu, Sn, Al) and harmonising related normative references and test/inspection cross-references so that coatings comply with hazardous‑substance considerations without compromising fit‑for‑purpose protection.

Key topics and requirements

• Defined maximum trace-element limits in zinc coatings (examples given in the amendment include very low ppm/mass-% limits for arsenic, cadmium, antimony, bismuth, lead and others) to reduce hazardous substances in coatings.
• Adjustment and updating of normative references to align inspection, sampling and coating‑measurement standards (references include relevant ISO thread, sampling and coating measurement standards).
• Clarification of testing/inspection methods and quality control expectations for coated malleable cast iron fittings to demonstrate compliance with the amended composition limits.
• Maintains applicability to threaded fittings used in plumbing, heating, gas and certain industrial pipeline contexts while aligning coating chemistry with environmental/health constraints.

Typical use and users

Manufacturers of malleable cast iron threaded fittings, coating and galvanizing suppliers, quality and conformity assessment laboratories, procurement and specification engineers in plumbing/heating/gas and general industrial piping, and regulatory bodies concerned with hazardous substances in metallic coatings. The amendment is used to update production specifications, supplier contracts and inspection plans to ensure coating chemistry compliance.

Related standards

Standards frequently referenced with this amendment and ISO 49 include ISO 7‑1 (pipe threads where pressure-tight joints are made on the threads), ISO 1460 (evaluation of hot-dip galvanizing), ISO 2178 (coating thickness—magnetic method), ISO 2859 series (sampling procedures for inspection by attributes), ISO 5922 (malleable cast iron-related specifications), ISO 6708 (nominal size definitions) and general quality management references such as ISO 9001.

Keywords

malleable cast iron fittings, ISO 49, amendment 2018, zinc coating composition, hazardous substances, threaded fittings, ISO 7‑1, coating limits, galvanizing, inspection, sampling, metal fittings.

FAQ

Q: What is this standard?

A: It is Amendment 1 (2018) to ISO 49:1994, which modifies the original standard for malleable cast iron fittings threaded to ISO 7‑1 by specifying updated requirements for the chemical composition of zinc coatings to address hazardous‑substance concerns.

Q: What does it cover?

A: The amendment covers permissible trace-element limits and related coating‑composition requirements for zinc coatings on malleable cast iron threaded fittings, plus updates to normative references and testing/inspection cross-references needed to demonstrate compliance.

Q: Who typically uses it?

A: Manufacturers, coating suppliers, testing laboratories, specification and procurement engineers in plumbing, heating, gas and industrial piping sectors, and conformity assessment bodies use this amendment to ensure coatings meet chemical-safety expectations.

Q: Is it current or superseded?

A: The document is a published amendment (24 April 2018) to ISO 49:1994 and is the current amendment to that edition. Users should check national/ISO catalogues for any later revisions or replacements, but as issued it amends and remains part of the ISO 49:1994 normative package.

Q: Is it part of a series?

A: Yes — it is an amendment to ISO 49:1994; ISO 49 is part of the family of standards covering threaded fittings and pipe threads (for example ISO 7‑1 and related thread/dimension standards) and is handled by ISO/TC 5/SC 5 (threaded fittings and related items).

Q: What are the key keywords?

A: Malleable cast iron fittings, zinc coating composition, hazardous substances, ISO 7‑1, amendment 2018, metal fittings, galvanizing, coating limits.