ISO 1167-4:2007

Overview

ISO 1167-4:2007 is an international standard developed by the International Organization for Standardization (ISO) that specifies procedures for preparing thermoplastics pipe assemblies for testing resistance to internal hydrostatic pressure. Applicable to both end-load-bearing and non-end-load-bearing assemblies, this standard ensures consistent preparation methods for pipes, fittings, and assemblies intended for the conveyance of fluids. ISO 1167-4:2007 aligns testing practices with ISO 1167-1, supporting reliable performance assessments critical to the plastics piping industry.

Key Topics

• Scope and Relevance
  ISO 1167-4:2007 covers the preparation of test assemblies composed of pipes, fittings, valves, and joints made from thermoplastics. It applies to both fused and mechanically-joined assemblies, including those created with adhesives.

• Assembly Types

  • Fused assemblies: Produced by techniques such as butt fusion or electrofusion.
  • Mechanical end-load-bearing assemblies: Include pipes and components joined mechanically per manufacturer instructions.
  • Adhesively bonded assemblies: Assemblies joined using specified adhesives, following controlled times and environmental conditions.
  • Non-end-load-bearing assemblies: Combinations intended for scenarios where joint ends do not bear longitudinal loads.

• Test Piece Preparation

  • Ensures pipes and fittings are clean, cut to specification, free from defects, and assembled under standard conditions.
  • Specifies free pipe lengths and handling of tolerance variations to ensure valid pressure resistance results.

• Conditioning and Environmental Controls

  • Outlines the conditioning requirements such as temperature and humidity prior to testing.
  • Details proper storage and preparation of adhesive joints.

• Documentation and Traceability

  • Requires thorough documentation of methods, tools, assembly conditions, and adhesive identification in test reports.

Applications

ISO 1167-4:2007 is essential for organizations involved in the design, manufacture, and quality control of thermoplastics piping systems. Its adoption delivers several practical benefits:

• Product Development and R&D

  • Ensures reliable, repeatable testing for new pipe and fitting designs intended for fluid conveyance.

• Quality Assurance

  • Enables manufacturers to demonstrate compliance with international standards for pressure resistance, supporting product certification and market access.

• Infrastructure and Construction

  • Assists contractors and engineering firms in verifying that piping assemblies will withstand operational pressures, reducing risks of system failure in water supply, sanitation, and industrial applications.

• Regulatory Compliance

  • Provides a reference for auditors and regulatory bodies assessing plastic piping systems' performance and safety.

Related Standards

For comprehensive testing and assembly procedures, ISO 1167-4:2007 should be used in conjunction with related standards, including:

• ISO 1167-1: Thermoplastics pipes, fittings, and assemblies - General method for determining resistance to internal pressure
• ISO 3126: Plastics piping systems - Determination of dimensions
• ISO 11413: Preparation of test assemblies between polyethylene (PE) pipes and electrofusion fittings
• ISO 11414: Preparation of PE pipe and fitting assemblies by butt fusion
• EN 1066 / EN 1067: Procedures for sampling and preparation of adhesives for testing
• ISO 12176-1 / ISO 12176-2: Equipment standards for fusion jointing polyethylene systems (butt fusion and electrofusion)

By adhering to ISO 1167-4:2007, industries can ensure consistent performance testing, reduce the risk of assembly failures, and meet global expectations for the quality and safety of thermoplastic piping systems. This standard is a vital tool for manufacturers, laboratories, and certification bodies focused on the integrity of fluid conveyance infrastructure.