T/CNHA 1029-2020 "Leader Standard Evaluation Requirements for Water Sinks" (Note: The exact meaning and requirements of the "leader standard" may vary depending on the specific context and industry standards.)

Scope

Scope: This document specifies the terms and definitions, evaluation index system, and evaluation methods for the "Leader" standard evaluation of water nozzle products. This document applies to water nozzle products with nominal sizes of DN10, DN15, DN20, and DN25, operating pressures (static pressure) not exceeding 1.0 MPa, and water supply temperatures ranging from 4°C to 90°C, used in cold and hot water supply pipelines installed in buildings. This document does not apply to water nozzle products with built-in electric heating devices. Related institutions may refer to this document when formulating "Leader" evaluation schemes for enterprise standards, and enterprises may also use it as a reference when developing their own enterprise standards. Main technical content: (1) Basic requirements; (2) Evaluation index system: 1) Basic indicators: a) Thread; b) Assembly; c) Mechanical resistance to water pressure; d) Sealing performance; e) Flow rate; f) Sensitivity; g) Resistance to installation loads; h) Resistance to usage loads; i) Adhesion strength of coatings/plating; j) Anti-backflow performance; k) Exudation of metal contaminants; l) Appearance; m) Dimensions; 2) Core indicators: a) Water efficiency grade of water nozzles; b) Flow rate uniformity; c) Surface corrosion resistance; d) Lifespan; 3) Innovative indicators: a) Water flow impact force; b) Fidelity; c) Weighted average of lead content in water nozzles; d) Organic substance exudation from water nozzles; e) Operating force of water nozzles; f) High-temperature resistance; g) Pulse test; h) Cold-resistance performance; i) Bending arm strength; j) Extractable water nozzles' cold and hot impact; k) Extractable outlet switching function; l) Acoustic performance.

Development Information

Related Standards