本文件提供了海底井口、泥线井口、钻穿泥线井口以及垂直和水平海底树木的规范。它规定了搬运、测试和安装设备所需的相关工具。它还规定了设计、材料、焊接、质量控制[包括工厂验收测试（FAT）]、单个设备、组件和海底树组件的标记、存储和运输等领域。

This document provides specifications for subsea wellheads, mudline wellheads, drill-through mudline wellheads, and both vertical and horizontal subsea trees. It specifies the associated tooling necessary to handle, test, and install the equipment. It also specifies the areas ofdesign, material, welding, quality control [including factory acceptance testing (FAT)], marking, storing, and shipping for individual equipment, subassemblies, and subsea tree assemblies.