本标准旨在提供钢制水管和管件的聚氨酯涂层和衬里系统的最低要求，包括材料、表面处理、测试、搬运和包装要求。本标准可在《钢制水管内外部规范》中引用。本标准的规定适用于引用本文件的情况，且仅适用于钢制水管内外的聚氨酯系统。

The purpose of this standard is to provide the minimum requirements for polyurethane coating and lining systems for steel water pipe and fittings including materials, surface preparation, testing, handling, and packaging requirements.This standard can be referenced in specifications for the interior and exterior of steel water pipe. The stipulations of this standard apply when this document has been referenced and then only to polyurethane systems for the interior and exterior of steel water pipe.