标准摘要
[中文适用范围]： ISO 28721的本部分规定了加工厂使用的搪玻璃法兰钢管和法兰钢管件的质量要求。 [外文原描述]： ISO 28721-4:2015 specifies the quality requirements for glass-lined flanged steel pipes and flanged steel fittings used for process plants.
英文名称Vitreous and porcelain enamels — Glass-lined apparatus for process plants — Part 4: Quality requirements for glass-lined flanged steel pipes and flanged steel fittings