BS EN ISO 28721-5:2016建立了化学品搪瓷缺陷分类系统 服务和船只。此外，它还描述了某些类型的缺陷处理区域 这很容易与搪瓷缺陷混淆。它有助于保持语言的一致性 关于搪瓷缺陷的指定和表征。ISO 28721的本部分仅限于可检测缺陷，并不打算充分考虑 考虑所有发生的缺陷类型。它不评估搪瓷缺陷；分类 根据经验执行，并尽可能符合ISO 28721-1。关于工艺工程用搪玻璃设备验收的说明，ISO 28721- 1适用。交叉引用:ISO 28721-1购买时可用的所有现行修订版均包含在本文件的购买中。

BS EN ISO 28721-5:2016 establishes a system for the cataloguing of defects in enamellings for chemical service and vessels. In addition, it describes some types of areas in which defects have been treated and which can easily be confounded with enamelling defects. It serves for a consistent language use concerning the designation and characterization of enamelling defects.This part of ISO 28721 is limited to detectable defects and does not purport to fully take into consideration all occurring types of defects. It does not evaluate enamelling defects; the classification carried out is based on experience and corresponds, as far as possible, to ISO 28721-1.NOTE Regarding the acceptance of glass lined equipment for use in process engineering, ISO 28721-1 applies.Cross References:ISO 28721-1All current amendments available at time of purchase are included with the purchase of this document.