GB/T 50989-2014
大型螺旋塑料管道输水灌溉工程技术规范
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Scope as published
本规范适用于水温不高于40℃、系统设计工作压力不大于0．1MPa、公称直径为DN400～DN2000的聚乙烯钢肋螺旋复合管道输水灌溉工程的规划、设计、施工、安装、验收与运行维护。
The original Chinese text is authoritative; this excerpt is retained as catalogue metadata, not a translated normative requirement.
Version history
Earlier editions: None recorded
Later editions: None recorded
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