ISO 4642-1:2015

Overview

ISO 4642-1:2015 establishes the requirements and test methods for semi-rigid, non-collapsible rubber and plastics hoses intended for fire-fighting service using fixed systems. Developed by the International Organization for Standardization (ISO), this standard focuses on semi-rigid hose reels frequently installed in buildings and other structures as part of fixed fire protection systems. The hoses covered under this standard are designed for use at specific maximum working pressures and within defined temperature ranges, ensuring reliable operation and safety during long intervals between uses.

Key Topics

• Scope and Applicability

  • Applies to semi-rigid reel hoses for fire-fighting installations in fixed systems.
  • Suitable for hoses with inside diameters of 19 mm and 25 mm (maximum 1.2 MPa pressure) and 33 mm (maximum 0.7 MPa pressure).
  • Intended for ambient, non-corrosive, and non-aggressive environments with operating temperatures from −20 °C to +60 °C.

• Classification

  • Hoses are classified by both construction (types A and B) and materials used for lining and cover (six classes in total).

• Dimensions and Tolerances

  • Specifies inside diameter tolerances, maximum allowed mass per meter, and permissible lengths based on project requirements.

• Performance Requirements

  • Detailed testing for hydrostatic strength, kink resistance, adhesion, accelerated aging, low-temperature flexibility, crushing resistance, ozone resistance, and hot surface performance.

• Testing and Compliance

  • Includes type tests (initial product approval), routine tests (on each manufactured hose), and batch production tests.
  • Mandates test report documentation and specifies marking requirements for product traceability.

Applications

• Fixed Fire Hose Reel Systems
  • Essential for fire safety in public and private buildings, commercial developments, industrial complexes, and other construction works.
  • Provides occupants and first responders with immediate access to reliable fire-fighting water supply.
• Long-Term Standby Use
  • Designed for installations where hoses remain unused for extended periods but must perform reliably when needed.
• Indoor Environments
  • Especially suitable for ambient, non-aggressive, and non-corrosive atmospheres, making them ideal for indoor fire protection.

Practical Value

By complying with ISO 4642-1:2015, manufacturers and installers of fire-fighting hose reels can ensure a consistently high level of safety, reliability, and durability. The standard addresses key operational factors such as pressure resistance, flexibility, age resistance, and clear identification through required markings. This supports regulatory compliance and enhances building safety protocols.

Related Standards

• EN 671-1: Fixed firefighting systems - Hose systems - Part 1: Hose reels with semi-rigid hose
• ISO 1402: Hydrostatic testing for rubber and plastics hoses and hose assemblies
• ISO 1307: Hose sizes, minimum and maximum inside diameters, and tolerances
• ISO 7326: Assessment of ozone resistance in hoses
• ISO 8033: Determination of adhesion between hose components
• ISO 9001: Quality management systems - Requirements
• ISO 8331: Guidelines for selection, storage, use, and maintenance of hoses and assemblies

Summary

ISO 4642-1:2015 is a critical standard for the safety and effectiveness of semi-rigid rubber and plastics hoses used in fixed fire-fighting systems. Its detailed specifications for design, performance, testing, and marking ensure fire hoses are fit for purpose, reliable in emergencies, and compliant with international best practices. Adherence not only meets regulatory requirements but also enhances overall building fire readiness and occupant safety.