SIST EN ISO 8308:2016 PDF

Overview

SIST EN ISO 8308:2016 specifies standardized methods for determining the transmission of liquids through the walls of rubber and plastics hoses and tubing. This standard, which is technically identical to ISO 8308:2015, is essential in assessing the permeation and evaporation characteristics of hose and tubing products utilized in industrial, automotive, and laboratory applications. By establishing uniform testing procedures, ISO 8308:2015 supports quality assurance, regulatory compliance, and product safety in sectors relying on hoses and tubing for fluid handling.

Key Topics

• Testing Methods: The standard describes two main test methods:

  • Method A: Applicable to all sizes and constructions of rubber and plastics hose and tubing. It is a practical, comparative test that simulates working conditions to measure the steady-state evaporation rate.
  • Method B: Limited to hoses and tubing up to 16 mm internal diameter, using a pressureless reservoir to assess liquid transmission by gravimetric analysis over an extended period.

• Test Conditions:

  • Standardized temperatures, as outlined in ISO 23529, ensure repeatability and comparability across testing cycles.
  • Use of specified test liquids, as required by relevant product standards, to reflect intended application environments.

• Reporting and Results:

  • Determination and reporting of evaporation or mass loss rates per unit area provide objective measures of liquid transmission.
  • Repeatability and reliability are ensured by standardized procedures and detailed test reports.

Applications

ISO 8308:2015 plays a vital role in various industrial, automotive, and laboratory settings where the prevention of liquid loss and contamination is critical. Typical applications include:

• Automotive fuel and fluid lines: Ensuring hoses and tubing maintain integrity and limit evaporative emissions.
• Chemical and laboratory tubing: Evaluating suitability for safe transfer of solvents, acids, and reagents.
• Industrial fluid transfer: Assessing the performance of hoses conveying oils, coolants, and process liquids in manufacturing.
• Regulatory compliance: Supporting compliance with environmental and safety regulations that set limits on evaporation and permeation from fluid-carrying hoses.

Manufacturers and quality control laboratories can use these methods to compare products, validate designs, and ensure ongoing product quality.

Related Standards

Organizations working with rubber and plastics hoses and tubing may find the following standards relevant:

• ISO 4671: Rubber and plastics hoses and hose assemblies – Methods of measurement of the dimensions of hoses and the lengths of hose assemblies.
• ISO 4788: Laboratory glassware – Graduated measuring cylinders.
• ISO 23529: Rubber – General procedures for preparing and conditioning test pieces for physical test methods.

These related standards ensure a comprehensive approach to the testing and specification of hose and tubing products, complementing the transmission testing described in SIST EN ISO 8308:2016.

Keywords: ISO 8308, SIST EN ISO 8308:2016, liquid transmission, hose permeability, rubber and plastics tubing, evaporation test, industrial hose testing, standard test methods, product compliance, automotive hoses, laboratory tubing, fluid handling, permeability testing.