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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 23448-2009 Sanitary ware - Flexible hose, in addition to editorial changes, the following main technical changes have been made with respect to GB/T 23448-2009.
——The definition of flexible hose for sanitary tapware is revised (see 3.1; 3.1 of Edition 2009);
——The definition of pullout hose for faucet is added (see 3.5);
——The definition of sleeve is added (see 3.9);
——The definition of flexible hose contacted with drinking water is added (see 3.10);
——The classification and code of product are revised (see Clause 4; Clause 4 of Edition 2009);
——The material requirements are revised (see Clause 5; Clause 5 of Edition 2009);
——The minimum dimensional requirements of inner diameter of flexible hose are deleted (see 6.2.2 of Edition 2009);
——The requirements of effective connecting thread of flexible hose are added (see 6.3.1);
——The flow requirements are added (see 6.6);
——The bending resistance requirements of the pullout hose for faucet are added (see 6.9);
——The requirements of cold and hot cycle resistance of flexible hose for washing and pullout hose for faucet are added (see 6.10);
——The surface corrosion resistance requirements are revised (see 6.12; 6.1.3 in 2009 edition);
——The requirements of hazardous substance extracted limit are added (see 6.13 and Annex A);
——The provisions of flow test method are added (see 7.6);
——The provisions of stretch resistance test method are revised (see 7.7; 7.6 in Edition 2009);
——The provisions of impulse resistance test method are revised (see 7.8; 7.7 in Edition 2009);
——The provisions of bending resistance test method are revised (see 7.9; 7.8 in Edition 2009);
——The provisions of surface corrosion resistance test method are revised (see 7.12; 6.1.3 in Edition 2009);
——The provisions of hazardous substance extraction test method are added (see 7.13 and Annex B).
This standard was proposed by China Building Materials Federation.
This standard is under the jurisdiction of National Technical Committee on Architecture and Sanitary Ceramics of Standardization Administration of China (SAC/TC 249).
The previous edition of this standard is as follows:
——GB/T 23448-2009.
Sanitary ware - Flexible hose
1 Scope
This standard specifies the terms and definitions, classification and code, materials, technical requirements, test methods, inspection rules, marking, identification, packaging, transportation and storage of flexible hose for sanitary tapware.
This standard is applicable to flexible hose for sanitary tapware with working pressure not more than 1.0MPa and water supply temperature not more than 90℃.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 5750.6 Standard examination methods for drinking water - Metal parameters
GB/T 5750.8 Standard examination methods for drinking water - Organic parameters
GB/T 6461-2002 Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates - Rating of test specimens and manufactured articles subjected to corrosion tests
GB/T 7307 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads
GB/T 7759.1 Rubber, vulcanized or thermoplastic - Determination of compression set - Part 1: At ambient or elevated temperatures
GB/T 7759.2 Rubber, vulcanized or thermoplastic - Determination of compression set - Part 2: At low temperatures
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 16662 Terms of equipments and materials for building water supply and drainage
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 16662 and the following apply.
3.1
flexible hose for sanitary tapware
flexible pipe used for interconnection between cold and hot water supply pipelines and water sanitary ware or between sanitary ware and sanitary ware
3.2
flexible link hose for water
flexible hose used for connecting water supply pipelines with water appliances (e.g. urinal, water heater, faucet, washing machine, etc.)
3.3
flexible hose for shower
flexible hose for connecting water supply pipeline or faucet with shower
3.4
flexible hose for washing
flexible hose for connecting water supply pipelines and washing nozzle
3.5
pullout hose for faucet
flexible hose for connecting the water outlet of kitchen water nozzle or basin water nozzle with water outlet nozzle
3.6
flexible hose for cool water
applicable to flexible hose with water temperature not more than 50℃
3.7
flexible hose for hot water
applicable to flexible hose with water temperature more than 50℃.
3.8
length of flexible hose
distance between the outer end surfaces of the two joints of flexible hose
3.9
sleeve
device used to fix inner pipe to joint of flexible hose
3.10
flexible hose contacted with drinking water
flexible hose installed in domestic drinking water delivery pipelines for connecting water supply pipelines with water supply appliances (e.g. kitchen water nozzles, basin water nozzles or drinking fountains, etc.)
4 Classification and code
See Table 1 for the classification and code of products.
Table 1 Classification and code of flexible hose for sanitary tapware
Classification Product Code
Classification by function Flexible link hose for water L
Flexible hose for shower S
Flexible hose for washing W
Pullout hose for faucet P
Classification by health standards Flexible hose contacted with drinking water D
Flexible hose contacted with undrinkable water N
Classification by temperature of used water Flexible hose for cool water C
Flexible hose for hot water H
5 Materials
5.1 All the materials of the products in contact with drinking water directly shall not change the water quality, appearance, taste and smell, etc. of drinking water under the specified use conditions hereof.
5.2 The material of rubber sealing ring shall be tested for 24h at (-10±1)℃ and (70±1)℃ respectively according to the methods specified in GB/T 7759.1 and GB/T 7759.2, and the compression set shall not exceed 20%.
5.3 Weaving wires, joints and sleeves for flexible hose shall be made of corrosion resistant materials.
6 Technical requirements
6.1 Appearance
6.1.1 The surface of the metallic outer pipe shall be free from defects such as peeling, bubbles, scale, rust, cracks, oil stains, obvious scratches, indentations, exploding wire, broken wire and sharp folds; the surface of the non-metallic outer pipe shall be free from obvious corrugations, weld marks, scratches and scraps and damages.
6.1.2 The inner and outer surfaces of the flexible hose joint shall be free from obvious defects such as cracks and unevenness; the surface of the thread shall be free from defects such as broken thread and dents.
6.2 Dimensions
The nominal dimension of the product shall be determined by the manufacturer and the permissible length deviation shall meet those specified in Table 2.
Table 2 Permissible length deviation of product In mm
Product length L L≤500 5002 000
Permissible upper deviation ΔL1 +10 +20 +30 +40
Permissible lower deviation ΔL2 0 0 0 0
6.3 Threaded connection
6.3.1 The thread precision of flexible hose joint shall conform to the requirements of GB/T 7307, and the precision grade of external thread shall not be lower than Grade B. The minimum length of the effective connecting thread of the flexible hose shall reach the provisions specified in Figure 1 and Table 3. For special products, the specifications stipulated in the contract are allowed.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and code
5 Materials
6 Technical requirements
7 Test methods
8 Inspection rules
9 Marking and identification
10 Packaging, transportation and storage
Annex A (Normative) Requirements for the limit of hazardous substances extracted from flexible hose
Annex B (Normative) Testing method for metallic and organic compound extraction
