T/CSTE 0078-2021 "Leader" standard evaluation requirements for rigid polyvinyl chloride (PVC-U) pipe for building drainage

Scope

Scope: This document specifies the terms and definitions, evaluation index system, and evaluation methods for the "Leader" standard evaluation of rigid polyvinyl chloride (PVC-U) pipes used in building drainage. This document is applicable to the evaluation of the enterprise standard level of pipes used in building drainage systems, which are mainly made of polyvinyl chloride (PVC) resin and extruded into pipes. Relevant institutions can refer to it when formulating the evaluation scheme for the "Leader" standard of enterprise standards, and enterprises can also refer to it when formulating their own enterprise standards. Main technical content: 4.2.1 The evaluation indexes of the "Leader" standard for rigid PVC-U pipes used in building drainage include basic indexes, core indexes, and innovative indexes. 4.2.2 The basic indexes include density, Vicat softening temperature, longitudinal shrinkage rate, drop hammer impact test, and related requirements for system applicability. 4.2.3 The core indexes include: tensile yield strength, elongation at break, and lead content. 4.2.4 The core indexes are divided into three levels: advanced level, average level, and benchmark level. The advanced level corresponds to the 5-star level in the enterprise standard ranking list; the average level corresponds to the 4-star level in the enterprise standard ranking list; and the benchmark level corresponds to the 3-star level in the enterprise standard ranking list. 4.2.5 The innovative index is the ring flexibility test, and it is encouraged to add relevant innovative indexes related to product performance and consumer concerns when conditions permit.

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