T/CSTE 0077-2021 "Leader standard evaluation requirements for cold and hot water polypropylene (PP-R) piping systems"
T/CSTE 0077-2021 "Leader standard evaluation requirements for cold and hot water polypropylene (PP-R) piping systems"
Basic Information
Scope
Scope: This document specifies the terms and definitions, evaluation index system, and evaluation methods for the "Leader" standard evaluation of circular cross-sectional random copolymer polypropylene (PP-R) pipes made from random copolymer polypropylene compound granules by extrusion molding. This document is applicable to cold and hot water piping systems in buildings, including those for drinking water and heating. It can be used as a reference by relevant institutions when formulating "Leader" evaluation schemes for enterprise standards, and by enterprises when developing their own enterprise standards. Main technical content: 4.2.1 The evaluation indicators for "Leader" standard of PP-R pipes for cold and hot water include basic indicators, core indicators, and innovative indicators. 4.2.2 Basic indicators include ash content, melting temperature, oxidation induction time after 95℃/1000h hydrostatic pressure test, pigment dispersion, melt flow rate, thermal stability test under hydrostatic pressure, light transmittance, oxygen permeability, internal pressure resistance test, and thermal cycling test, as well as related requirements for hydrostatic pressure tests. 4.2.3 Core indicators include oxidation induction time, longitudinal shrinkage rate, and simple beam impact test. 4.2.4 Core indicators are divided into three levels: advanced, average, and baseline. The advanced level corresponds to a 5-star rating in the enterprise standard ranking list; the average level corresponds to a 4-star rating; and the baseline level corresponds to a 3-star rating. 4.2.5 Innovative indicators include antimicrobial performance, with three levels: advanced, average, and baseline. The advanced level corresponds to a 5-star rating; the average level corresponds to a 4-star rating; and the baseline level corresponds to a 3-star rating. Encourage adding relevant innovative indicators related to product performance and consumer concerns when conditions permit.