ICS47.020.30 U55 GB 中华人民共和国国家标准 GB/T34032—2017 船舶与海上技术 管路系统衬垫密封 机械接头及其附件 性能规范 Ships and marine technology-Gasketed mechanical couplings and its fittings for use in piping systems-Performance specification (ISO15837:2004,Ships and marine technologyGasketed mechanical couplingsfor usein pipingsystemsPerformance specification; ISO 15838:2003,Ships and marine technology—Fittings for use with gasketed mechanical couplings used in piping applications- Performance specification,NEQ) 2017-07-31发布 2018-02-01实施 中华人民共和国国家质量监督检验检疫总局 发布 中国国家标准化管理委员会