ISO 614:2012

Overview

ISO 614:2012 - "Ships and marine technology - Toughened safety glass panes for rectangular windows and side scuttles - Punch method of non‑destructive strength testing" specifies a standardized, non‑destructive test method for assessing the breaking reliability of thermally toughened safety glass used in ship windows and side scuttles (in accordance with ISO 21005). The standard defines test apparatus, procedure, acceptance criteria and marking requirements to ensure consistent quality and safety of marine glazing.

Key topics and technical requirements

• Scope: Applies to toughened safety glass panes for rectangular windows and side scuttles that comply with ISO 21005.
• Test method: The punch method is a non‑destructive strength test executed with a defined punch, pad and support ring arrangement.
• Test apparatus: Two forms are specified:
  • Form A for panes ≥ 250 mm (flat ring 200 mm),
  • Form B for panes > 200 mm and < 250 mm (flat ring 150 mm).
    Components include a steel base plate, rubber flat ring (40–60 IRHD), steel punch (flattened lower part to 12.5 mm diameter), felt or fibre‑board pad (approx. 5 mm felt / 2 mm fibre‑board) and adapter.
• Procedure:
  • Position pane so its edge is ≥ 25 mm from the ring hole; center punch and interpose pad.
  • Apply load at a steady rate of 1 000 N/s to the specified proof load and maintain for 5 s, then gradually remove the load.
• Proof loads: Specified by glass thickness; examples:
  • 6 mm ≈ 3 400–3 500 N, 8 mm ≈ 6 500–6 700 N, 10 mm ≈ 10 200–11 000 N, 12 mm ≈ 15 500 N, up to 25 mm ≈ 53 000 N.
• Acceptance: Pane shall remain unbroken and show no signs of damage after the test.
• Marking: Tested panes must carry visible markings - single inverted triangle (clear glass) or double inverted triangle (surface treated) with nominal thickness indicated; marking applied before toughening and visible after assembly.

Applications and users

• Who uses ISO 614:2012:
  • Shipbuilders and naval architects specifying glazing for windows and side scuttles.
  • Glass manufacturers and tempering plants performing quality and production acceptance tests.
  • Marine certification bodies, classification societies and testing laboratories conducting compliance checks.
• Practical uses:
  • Non‑destructive quality control during production.
  • Demonstrating compliance with marine safety requirements for ship windows and scuttles.
  • Supporting procurement specifications and acceptance testing without destroying samples.

Related standards

• ISO 21005 - Thermally toughened safety‑glass panes for windows and side scuttles (normative reference).
• ISO 48 - Rubber hardness determination (used for flat ring hardness specification).

Keywords: ISO 614:2012, punch method, non‑destructive strength testing, toughened safety glass, marine glazing, ship windows, side scuttles, proof load, ISO 21005.