PVC-O Pipe Standards

ISO 16422, CJ/T 445 & GB/T 41422 explained

PVC-O Pipe Standards: ISO 16422, CJ/T 445 & GB/T 41422 Explained

Published: September 7, 2026Updated: September 10, 2026Author: WEBON PVC-OCategory: PVC-O Technology

Quick Answer: PVC-O pipes are governed by three main standards: ISO 16422 (international), CJ/T 445-2014 (Chinese industry standard) and GB/T 41422-2022 (Chinese national standard). Together they define dimensions, pressure classes (PN8-PN25), material grades (PVC-O 400/450/500), test methods and fitness-for-purpose requirements. For international projects, specify pipes certified to ISO 16422.

Quality standards are essential for ensuring PVC-O pipe performance and reliability. This article explains the key international and Chinese standards that govern PVC-O pipe manufacturing, testing, and application.

ISO 16422: International Standard for PVC-O Pipes

ISO 16422 is the international standard for "Pipes and fittings made of oriented unplasticized polyvinyl chloride (PVC-O) for water supply." This standard is recognized and used worldwide and covers:

  • Material requirements: Specifications for PVC compound composition and properties
  • Dimensional requirements: Nominal diameters, wall thicknesses, and tolerances
  • Mechanical properties: Tensile strength, impact resistance, and pressure ratings
  • Test methods: Standardized testing procedures for quality verification
  • Marking requirements: Pipe identification and traceability

WEBON PVC-O pipes are manufactured in compliance with ISO 16422, ensuring international acceptance and quality assurance.

CJ/T 445-2014: Chinese Industry Standard

CJ/T 445-2014 is the Chinese industry standard for molecularly oriented PVC (PVC-O) pipes used in water supply. This standard specifies:

  • Applicable scope: buried water supply PVC-O pipes
  • Material classification: PVC-O 400, 450, and 500 grades
  • Pressure ratings: PN8 through PN25
  • Dimensional specifications for standard pipe sizes
  • Physical and mechanical property requirements
  • Inspection and acceptance criteria

GB/T 41422-2022: Chinese National Standard

GB/T 41422-2022 is the updated Chinese national standard for PVC-O pipes, reflecting the latest technology developments. This standard enhances the previous industry standard with:

  • Updated technical requirements aligned with international standards
  • Expanded diameter range coverage
  • Refined testing procedures
  • Additional quality control requirements
  • Improved marking and traceability specifications

WEBON's Quality Record

WEBON PVC-O pipes are manufactured to meet or exceed all applicable standards. Our quality assurance system ensures:

  • Low failure rate: Strong quality record on delivered PVC-O pipes
  • Full standard compliance: ISO 16422, CJ/T 445-2014, and GB/T 41422-2022
  • Comprehensive testing: Every production batch undergoes rigorous quality testing
  • Free samples: We provide free samples for customer verification and selection

Why Standards Matter

Compliance with recognized standards provides several benefits:

  • Guaranteed product quality and performance
  • International acceptance and market access
  • Engineering specification compliance
  • Insurance and regulatory approval
  • Long-term reliability assurance

Conclusion

Understanding and complying with PVC-O pipe standards is essential for manufacturers, engineers, and project owners. WEBON's commitment to ISO 16422, CJ/T 445-2014, and GB/T 41422-2022 ensures our pipes meet the highest international quality requirements. Contact us for more information about our standard-compliant PVC-O pipes.

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