用于燃气输送、分配和安装（入口压力不超过 10 MPa）的燃气压力安全和控制装置 第3部分 安全关闭装置

[中文适用范围]： 本文件规定了燃气安全关闭装置（SSD）的安全、结构、性能、测试和文件要求。本文件适用于工作压力大于 500 kPa（5 bar1)) 至 10 MPa（100 bar）、公称连接尺寸最大至 DN 400 的 SSD，用于商业工业设施（包括燃气基础设施）中的天然气、人造气、生物甲烷或液化石油气（LPG）等燃气。本文件适用于工作温度范围为 −20 °C 至 +60 °C 的 SSD；本文件适用于： — 用于产品型式试验、常规试验和批量监督试验的试验方法； — 使用管道燃气作为控制能量源，不借助任何外部电源的 SSD； — 在同一机身上集成第二个 SSD，符合本文件的要求的 SSD； — 集成符合 ISO 23555-2 的燃气压力调节器的 SSD； — 符合本文件要求的装有蠕变（排气）泄压装置和/或排气限制器的 SSD；本文件不适用于： — 安装在家用燃气表下游的家用燃气用具上游/上/内的 SSD； — 设计用于纳入服务管线（从燃气基础设施中的主管道到燃气输送点的管道）中使用的压力控制系统的 SSD，其声明的体积流量 ≤ 200 m3/h (n)； — 开/关型工业过程控制阀（有关此类阀门的设计、分类和测试信息，请参阅 IEC 60534）；注：此类阀门不能声明符合本文件。 — 在酸性气体环境（含有水和 H2S 的气体环境被视为酸性）或腐蚀性条件下使用的 SSD； — 如果未提供其他信息（例如污染物、液体等），则在有废气（例如沼气等）的使用条件下的 SSD。1) 1 bar = 0.1 MPa = 105 Pa； 1 MPa = 1 N/mm2。1 [外文原描述]： This document specifies safety, constructional, performance, testing and documentation requirements of gas safety shut-off devices (SSDs). This document is applicable to SSDs with operating pressures greater than 500 kPa (5 bar ) up to 10 MPa (100 bar) of nominal connection sizes up to and including DN 400 for use with fuel gases such as natural gas, manufactured gas, biomethane or liquefied petroleum gas (LPG) in commercial industrial installations, including fuel gas infrastructures. This document is applicable to SSDs for an operating temperature range from −20 °C to +60 °C; This document is applicable to: — test methods which are intended for product type tests, routine tests and batch surveillance tests; — SSDs which use the pipeline gas as a source of control energy unassisted by any external power source; — SSDs integrating on the same body a second SSD, conforming to the requirements in this document; — SSDs integrating a gas pressure regulator conforming to ISO 23555-2; — SSDs incorporating a creep (venting) relief device and/or a vent limiter conforming to the requirements in this document; This document does not apply to: — SSDs upstream from/on/in domestic gas-consuming appliances which are installed downstream of domestic gas meters; — SSDs designed to be incorporated into pressure control systems used in service lines (pipework from the main pipework in a gas infrastructure to the point of delivery of the gas) with declared volumetric flow rate ≤ 200 m 3 /h (n); — industrial process control valves on/off type (see IEC 60534 for information on the design, classification and tests for this type of valve); NOTE Such valves cannot be declared conformant to this document. — SSDs used in sour gas environments (gas environments containing water and H 2 S are considered sour) or corrosive conditions; — SSDs in service conditions with waste gases (e.g. biogas etc.), if additional information is not provided (e.g. contaminant, liquid etc.).