GB/T 12777-1999金属波纹管膨胀节通用技术条件.pdf

tcs47.020.30 U 50 眉昌 中 华 人 民 共 和 国 国 家 标 准 Gs/T12777-1999 金属波纹管膨胀节通用技术条件 Generalspecificationformetalbellowsexpansionjoints 1999一06一11发布 2000一03一01实施 国家 质 Rk 技 术 监 督 局 发布 Gr/s 12777-1999 目 次 前言 ····················， I 1 范围 ··········································，···································，························…… 1 2 引用标准 ·I 3 定义 ················1 4 分类 ··。······················。························。···。··················。··。··。···························，。·…… 6 5 要求 ·······················。·········。·······························。·············································。。。… 7 6 试验方法 ····，’······，，·····.，··，····‘····，·····，，·，············· ·······一 11 7 检验规则 ··············································‘··········。···········。······················，···········…… 12 8 标志 ·····，·····································································································。··…… 14 9 包装、运输、贮存 ··············。······。·········。···，·············。·。·······。。·。····························.·..·…… 14 附录A(标准的附录) 波纹管设计 ····································································。······…… 15 附录S(提示的附录)结构件设计 ·········································。.…29 GB/T 12777-1999 前 言 本标准是对GB/T12777-1991《金属波纹管膨胀节通用技术条件》的全面修订。 本标准非等效采用了美国膨胀节制造商协会(EJMA)标准 1993年第6版及其他国内、外现行标准 的有关 内容 ，并吸取 了近年来 国内膨胀 节行业在波纹管膨胀节设计 、制造方面 的研究成 果与实践经验 。 与前版 比较 ，本标准有下列重要技 术内容的改变 : a)增加 了膨胀 节的型式分类和型号表示方法 ; b)增加了加强U形波纹管和0形波纹管的设计公式，修改了波纹管设计疲劳寿命安全系数要求; c)修改了受压筒节的制造要求; d)修改了管坯纵向焊缝及波纹管连接环向焊缝的探伤要求; e)修改了压力试验的试验压力要求及疲劳试验的试验位移循环次数要求; f)删除了刚度试验和失稳试验两个检验项 目。 本标准自实施之 日起代替GB/T12777-19910 本标准 的附录 A 是标准的附录 ; 本标准 的附录 B是提示的附录。 本标准