CJ 274-2008 in English

本标准是对ＧＢ１６８０２—１９９７《城镇燃气调压器》的修订。本标准在制定过程中主要参考了欧洲标准ＥＮ３３４：２００５《最高进口压力到１０ＭＰａ的燃气调压器》，本标准与ＥＮ３３４的一致程度为非等效。本标准规定了城镇燃气（人工煤气、天然气、液化石油气和液化石油气—空气混合气等，下同）输配系统用的燃气调压器的术语、定义和符号、分类和标记、结构与材料、技术要求、试验方法、检验规则、标志、标签、使用说明书以及包装、运输、储存。本标准适用于进口压力不大于４．０ＭＰａ、工作温度范围不超出－２０℃～６０℃且不低于燃气露点温度、公称尺寸不大于３００ｍｍ 的调节管道燃气后压的调压器。度、公称尺寸不大于３００ｍｍ 的调节管道燃气后压的调压器。

Scope

This standard specifies the terms, definitions and symbols of gas pressure regulators (hereinafter referred to as pressure regulators) used in urban gas (artificial gas, natural gas, liquefied petroleum gas and liquefied petroleum gas-air mixture, the same below) transmission and distribution systems , classification and marking, structure and materials, technical requirements, test methods, inspection rules, signs, labels, instructions for use, and packaging, transportation, and storage. This standard is applicable to pressure regulators that regulate pipeline gas back pressure with an inlet pressure not greater than 4.0MPa, an operating temperature range not exceeding -20 ℃ ~ 60 ℃ and not lower than the gas dew point temperature, and a nominal size not exceeding 300mm. This standard does not apply to pressure regulators and pressure regulators for bottled liquefied petroleum gas. All pressure values mentioned or not specified in this standard refer to gauge pressure values in MPa.