GB/T 44574-2024 建筑排水管道系统防污染用塑料止回阀

ICS

83.140.30

CCS

G33

中华人民共和国国家标准

GB/T44574—2024

建筑排水管道系统防污染用塑料止回阀

Plasticcheckvalvesforanti-pollutionfordischargepipingsystemsinsidebuildings

2024-09-29发布2025-04-01实施

国家市场监督管理总局发布

国家标准化管理委员会

GB/T44574—2024

目次

前言

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1

范围

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2

规范性引用文件

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3

术语和定义、符号和缩略语

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3.1

术语和定义

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3.2

符号和缩略语

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4

材料

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5

设计

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6

要求

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6.1

外观

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6.2

颜色

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6.3

规格尺寸

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6.4

性能要求

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6.5

铅限量

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7

试验方法

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7.1

状态调节

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7.2

外观和颜色

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7.3

尺寸

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7.4

密度

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7.5

维卡软化温度

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7.6

熔体质量流动速率变化率

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7.7

氧化诱导时间

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7.8

烘箱试验

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7.9

坠落试验

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7.10

流通能力

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7.11

水密性

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7.12

铅限量

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8

检验规则

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8.1

检验分类

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8.2

组批和分组

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8.3

出厂检验

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8.4

型式检验

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8.5

判定规则

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9

标志、包装、运输、贮存

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Ⅰ

GB/T44574—2024

9.1

标志

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9.2

包装

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9.3

运输

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9.4

贮存

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附录A（资料性）

止回阀的典型结构

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参考文献

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GB/T44574—2024

前言

本文件按照GB/T1.1—2020《标准化工作导则第1部分：标准化文件的结构和起草规则》的规

定起草。

请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。

本文件由中国轻工业联合会提出。

本文件由全国塑料制品标准化技术委员会（SAC/TC48）归口。

本文件起草单位：公元股份有限公司、浙江伟星新型建材股份有限公司、爱康企业集团（浙江）有

限公司、顾地科技股份有限公司、台州市黄岩区计量与产品质量安全检测研究院、江苏双腾管业有限公

司、江苏华塑新型建材有限公司、中国五洲工程设计集团有限公司。

本文件主要起草人：黄剑、邵慧彬、杨兴月、李贤梅、夏春宇、李广忠、杨建国、孙华丽、

王娅茹。

Ⅲ

GB/T44574—2024

建筑排水管道系统防污染用塑料止回阀

1范围

本文件规定了建筑排水管道系统防污染用塑料止回阀（以下简称“止回阀”）的材料、设计、性

能、检验规则和标志、包装、运输、贮存等方面的要求，描述了相应的试验方法。

本文件适用于建筑物内塑料排水管道系统防污染用止回阀的制造与检验。

注：选购方有责任根据其特定应用需求，结合相关法规、标准或规范要求，恰当选用本产品。

2规范性引用文件

下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文

件，仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包括所有的修改单）适用

于本文件。

GB/T1033.1塑料非泡沫塑料密度的测定第1部分：浸渍法、液体比重瓶法和滴定法

GB/T1040.2塑料拉伸性能的测定第2部分：模塑和挤塑塑料的试验条件

GB/T1633热塑性塑料维卡软化温度（VST）的测定

GB/T2828.1计数抽样检验程序第1部分：按接收质量限（AQL）检索的逐批检验抽样计划

GB/T2918塑料试样状态调节和试验的标准环境

GB/T3682.1塑料热塑性塑料熔体质量流动速率（MFR）和熔体体积流动速率（MVR）的测

定第1部分：标准方法

GB/T5761悬浮法通用型聚氯乙烯树脂

GB/T8801硬聚氯乙烯（PVC﹘U）管件坠落试验方法

GB/T8802热塑性塑料管材、管件维卡软化温度的测定

GB/T8803注射成型硬质聚氯乙烯（PVC﹘U）、氯化聚氯乙烯（PVC﹘C）、丙烯腈﹘丁二烯﹘苯

乙烯三元共聚物（ABS）和丙烯腈﹘苯乙烯﹘丙烯酸盐三元共聚物（ASA）管件热烘箱试验方法

GB/T8806塑料管道系统塑料部件尺寸的测定

GB/T10002.1—2023给水用硬聚氯乙烯（PVC﹘U）管材

GB/T19278热塑性塑料管材、管件与阀门通用术语及其定义

GB/T19466.6塑料差示扫描量热法（DSC）第6部分：氧化诱导时间（等温OIT）和氧化

诱导温度（动态OIT）的测定

GB/T26125—2011电子电气产品六种限用物质（铅、汞、镉、六价铬、多溴联苯和多溴二苯

醚）的测定

3术语和定义、符号和缩略语

3.1术语和定义

GB/T19278界定的以及下列术语和定义适用于本文件。

1