1.1本规范提供了半平齐、油密和水密螺栓铰接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、螺柱、垫圈、铰链组件和螺母。 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。 1.5本标准不适用于某些危险货物。（见46CFR 153.254和46CFR 154.340。） 1.6本规范规定了承受主要或循环荷载的人孔盖组件的设计和施工，可能需要其他钢筋或施工标准，以将人孔盖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 hinged manhole cover assembly. 1.2 The manhole cover assemblies depicted on this specification are 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, studs, washers, hinge assemblies, and nuts. 1.3 Handles, if required, shall be as specified in the ordering information. 1.4 Values stated in inch-pound units are to be regarded as standard. 1.5 This standard 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 primary or cyclic 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.