1.1本规范提供了半平齐、油密和水密螺栓人孔盖组件的设计和施工标准。 1.2本规范中描述的人孔盖组件用于需要油密和水密盖的甲板或舱壁，不需要完全冲洗。人孔盖组件应配有盖、安装环、垫圈、焊接螺柱、垫圈和螺母。 1.3手柄（如需要）应符合订购信息中的规定。 1.4以英寸-磅为单位的数值应视为标准值。括号中给出的值仅供参考。 1.5本规范不适用于某些危险货物（见46CFR 153.254和46CFR 154.340）。 1.6本规范规定了承受侧向压力（如车辆荷载或静水压力）的人孔盖组件的设计和施工。如果荷载、其他钢筋或施工标准可能需要将人孔组件与甲板或舱壁开口所需的结构钢筋整合在一起。 用于一次或循环荷载的人孔盖组件的设计不在本规范的范围内。

1.1 This specification provides design and construction criteria for a semi-flush, oiltight, and watertight bolted manhole cover assembly. 1.2 The manhole cover assembly depicted in this specification is for use in decks or bulkheads requiring oiltight and watertight covers that are not required to be completely flush. Manhole cover assemblies shall be complete with covers, mounting rings, gaskets, welded studs, washers, and nuts. 1.3 Handles, if required, shall be as specified in the ordering information. 1.4 The values stated in inch pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 This specification is not applicable to certain hazardous cargos (see 46CFR 153.254 and 46CFR 154.340). 1.6 This specification provides design and construction for manhole cover assemblies subjected to lateral pressures such as resulting from vehicle loads or hydrostatic pressures. Where loads, other reinforcement or construction criteria may be necessary to integrate the manhole assembly with the required structural reinforcement for openings in decks or bulkheads. Design of the manhole cover assembly for primary or cyclic loads is beyond the scope of this specification.