ISO 8033:2016

Overview

ISO 8033:2016 - "Rubber and plastics hoses - Determination of adhesion between components" specifies laboratory test methods to measure the adhesion strength between the constituent layers of rubber and plastic hoses. Adequate adhesion between lining, reinforcement, cover and optional laminations is essential for hose performance and service life. The standard applies to all bore sizes and a wide range of hose constructions, including woven, braided, knitted, circular‑woven, spiral, cord, wire braid/spiral and hoses with supporting helixes.

Key topics and technical requirements

• Adhesion interfaces covered
  • Lining ↔ reinforcement
  • Cover ↔ reinforcement
  • Reinforcement layer ↔ reinforcement layer
  • Cover ↔ outer lamination (protective thin layer)
  • Lining ↔ inner lamination (permeation barrier)
• Hose constructions covered
  • Woven, braided, knitted, circular‑woven, textile spiral, textile cord, wire braid, wire spiral, hoses with helix
• Test pieces
  • Eight specified test‑piece types (strip and ring forms, e.g. Type 1: 25 mm ring → strip; Type 6: 35 mm ring; Type 7: strip along helix). Selection depends on hose nominal bore and construction.
• Apparatus
  • Power‑driven tensile test machine with constant traverse and autographic recorder
  • Machine accuracy to ISO 5893 class 0.5 or 1 and use of an inertialess dynamometer
  • Appropriate grips (self‑tightening recommended) and mandrel for ring tests
• Preparation and procedure
  • Cut test pieces without heat buildup, buff thickness to align separated faces with grip axis
  • Conditioning of specimens and control of time interval after vulcanization before testing
  • Defined test speed, insertion method, force measurement and data recording
• Results and reporting
  • Adhesion strength expressed per the standard’s rules, with full test‑report requirements for reproducibility and traceability

Practical applications and users

ISO 8033:2016 is used to:

• Verify manufacturing quality and adhesion bonding in hose production
• Support incoming inspection, acceptance testing and final product testing
• Diagnose delamination or bonding failures in service investigations
• Inform product development and materials selection (R&D)
• Provide objective criteria for procurement specifications and compliance Typical users include hose manufacturers, independent test laboratories, OEMs (hydraulic, pneumatic, industrial fluid systems), quality managers, and regulatory bodies.

Related standards

• ISO 5893 - Rubber and plastics test equipment (tensile/flexural/compression)
• ISO 6133 - Analysis of multi‑peak traces in tear and adhesion tests
• ISO 23529 - General procedures for preparing and conditioning rubber test pieces

Keywords: ISO 8033:2016, adhesion testing, rubber and plastics hoses, hose component adhesion, lining reinforcement adhesion, hose test methods, hose quality control.