ISO 16132:2024 PDF

Overview

ISO 16132:2024 - "Ductile iron pipes and fittings - Seal coats for cement mortar linings" defines requirements for factory-applied seal coats over cement mortar linings inside ductile iron pipes and fittings. The standard sets performance and routine test criteria to ensure short‑term and long‑term sealing efficiency, durability under cyclic pressure, and consistent factory quality for products used with potable water, irrigation water, or other agreed applications.

Key topics and technical requirements

• Scope & applicability
  • Applies to seal coats applied in factory to cement mortar lined ductile iron pipes and fittings; suitable for potable and irrigation water or other uses by agreement.
• Performance tests
  • Short‑term sealing efficiency (Annex A): pH testing of exposure water (test water pH ~8.0; final test pH shall not exceed 9.5) measured over three successive 24 h exposures.
  • Long‑term sealing efficiency (Annex B): extended exposure requirements with the same pH limit of 9.5, unless otherwise agreed.
  • Cyclic pressure test (Annex C): visual inspection for peeling or cracking (no cracks > 0.8 mm) and subsequent sealing-efficiency verification.
• Routine factory tests
  • Visual appearance (no detrimental irregularities)
  • Coating thickness (Annex D; test film method or ISO 2808 methods)
  • Adhesion (Annex E): X‑cut method per ISO 16276‑2 or area disbond limit (