GB/T 17219-2025 Hygienic safety evaluation of distribution equipment, protective materials and treatment materials in drinking water system
1 Scope
This document specifies the requirements and inspection indicators for the hygienic safety evaluation of distribution equipment, protective materials and treatment materials in drinking water system, and describes the inspection methods.
This document is applicable to the hygienic safety evaluation of distribution equipment, protective materials and treatment materials in drinking water system.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 5749 Standards for drinking water quality
GB/T 5750 (all parts) Standard examination methods for drinking water
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 17218-2025 Hygienic safety evaluation of chemicals used in drinking water treatment
GB 31604.31 National food safety standard - Food contact materials and articles - Determination of vinyl chloride and its migration
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
distribution equipment
pipes, pipe fittings, water storage containers, non-negative pressure water supply equipment, water dispensers, sealing and water-stop materials, and mechanical components that come into contact with drinking water during the process of delivering it to users
3.2
protective materials
coatings, linings and other materials used for protecting drinking water pipeline systems or water storage containers and in contact with drinking water
3.3
treatment materials
water-insoluble materials used to purify soluble substances, suspended substances or colloids in drinking water through water treatment methods such as adsorption, filtration, ion exchange, aeration, oxidation and reduction
4 Hygienic requirements
4.1 Distribution equipment, protective materials and treatment materials shall not contaminate water quality, and the outlet water quality shall meet those specified in GB 5749.
4.2 Distribution equipment, protective materials and treatment materials shall be respectively subjected to immersion tests in accordance with those specified in Annexes A, B and C. As for the immersion test, the immersion water and the blank control water shall be simultaneously inspected. The hygienic requirements for the inspection indicators shall meet those specified in Tables 1 and 2. The evaluation of protective materials shall be based on the test results of the immersion water (immersing period: 30 d). Two samples of the same product shall be tested simultaneously, and the test results of both samples shall meet the corresponding hygienic requirements.
4.3 The 30-d immersion water of protective materials shall be subject to the following toxicological tests, and the test results shall meet the following requirements:
a) Acute oral toxicity test: The median lethal dose (LD50) shall not be less than 10g/kg of body weight;
b) Genetic toxicology tests: Both the bacterial reverse mutation test and the chromosomal aberration test shall be negative.
Table 1 Hygienic requirements for regular indicator of immersion test
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Hygienic requirements
5 Inspection indicators and methods
Annex A (Normative) Immersion methods of distribution equipment
Annex B (Normative) Immersion method of protective materials
Annex C (Normative) Immersion method of treatment materials
