SIST EN ISO 20182:2024 PDF

Overview

EN ISO 20182:2024 (Corrected version 2025-04) - titled Refractory test-piece preparation - Gunning refractory panels by the pneumatic-nozzle mixing type guns - defines the standardized procedure for producing test panels by gunning refractory materials with pneumatic-nozzle mixing guns at ambient temperature. It covers preparation under both standard conditions (laboratory quality‑assurance and product development) and site conditions (on‑site or simulated on‑site installation parameters). The document is published by CEN/ISO and supersedes the 2008 edition.

Key topics and technical requirements

• Scope and exclusions
  • Applies to gunning (dry or pre-dampened) with nozzle-mixing guns.
  • Excludes plastic gunning mixes, aggregates susceptible to hydration, and shotcrete mixes (see ISO 18886).
• Principle
  • Refractory conveyed pneumatically; liquid (default: water) introduced at the nozzle. Alternate gunning liquids (e.g., colloidal silica, alkaline accelerators) are allowed but must be specified.
• Apparatus and measurements
  • Required equipment: pneumatic nozzle-mixing gun, air compressor (with filter/water trap recommended), mixer, hose/nozzle assembly, air and water pressure gauges, water-measuring device.
  • Air pressure gauge accuracy and water-pressure gauge requirements are specified (e.g., air gauge up to 690 kPa ±5 %).
• Support plate and panel dimensions
  • Minimum usable panel size: 380 mm × 380 mm × 115 mm (allowing for edge removal). Preferred and alternative support plate designs are described; the chosen plate type and dimensions must be reported.
• Preparation under site conditions
  • Parameters such as ambient temperature, gunning elevation, air pressure and curing conditions should match site installation as closely as practicable. Off‑site simulation of site conditions is permitted by agreement between parties.
• Quality and reporting
  • Test reports must record key parameters (including any stainless‑steel wire fibre additions), apparatus used, panel dimensions, and curing/orientation details.
• Precision and operator effects
  • Equipment and operator technique affect results; for referee testing the same operator and equipment should be used.

Applications and typical users

• Used by refractory manufacturers, testing laboratories, product development teams, on‑site installation engineers, and quality assurance/inspection professionals for:
  • Reproducible test‑piece preparation for mechanical, thermal and other property testing.
  • Verifying product performance under standard and site conditions.
  • Comparing gunning processes, materials, and additives (including alternate gunning liquids).
  • Supporting acceptance testing during installation and R&D.

Related standards

• ISO 18886 - Shotcrete type mixes (not covered by EN ISO 20182).
• ISO 836 - Terminology for refractories (referenced terms).
• CEN/ISO publications and national adoptions (EN ISO status across CEN members).

Note: This standard contains safety warnings; users must establish appropriate health and safety measures before testing.