本文件规定了工艺装置用搪玻璃钢（包括半结晶搪瓷涂层）和搪玻璃钢铸件的设备、部件、器具和附件的质量要求。它规定了质量要求和制造商进行的试验，以及修复缺陷所采取的措施。 它也适用于搪玻璃泵、泵部件和配件。 它不适用于搪玻璃法兰钢管或搪玻璃法兰钢配件。 注1:ISO 28721-4中给出了搪玻璃法兰钢管和搪玻璃法兰钢配件的规定。 规定的试验方法包括检查搪瓷、尺寸精度以及仪器和部件的性能。 本文件适用于重新上釉的新设备和组件以及使用过的物品。 它不包含有关釉瓷和搪瓷的化学或物理性质的要求。 注2:附录A中给出了试验报告的示例。

This document specifies the quality requirements for apparatus, components, appliances and accessories of glass-lined steel (including semi-crystallized enamel coatings) and glass-lined steel castings used for process plants. It specifies the quality requirements and the tests to be carried out by the manufacturer as well as the actions to be taken to repair defects. It is also applicable to glass-lined pumps, pump components and fittings. It does not apply to glass-lined flanged steel pipes or glass-lined flanged steel fittings. NOTE 1 Provisions for glass-lined flanged steel pipes and glass-lined flanged steel fittings are given in ISO 28721-4. The test methods specified cover checking the enamel, the dimensional accuracy and the performance of apparatus and components. This document is applicable to new apparatus and components as well as used items that have been re-enamelled. It does not contain requirements regarding the chemical or physical properties of vitreous and porcelain enamels. NOTE 2 Examples of test reports are given in Annex A.