1.1 本规程建立了船用管道系统图纸符号。 1.2 这套标准符号旨在用于船舶的管道系统图表和布置图。 1.3 如果本实施规程未涵盖的项目或设备需要图形符号，则符号的形式和字符将由相关活动决定，前提是所使用的符号不与本文中包含的任何符号重复，并且清晰易懂，仅需进行一次解释，或在必要时通过图纸上的适当注释进行解释。 1.4 由于符号表示通常不涉及精确或比例布局或管道的实际运行或引线，因此相同的符号可用于系统的所有投影（平面图、立面图和剖面图）。 1.5 本规程不包括流体动力、加热、通风和空调（HVAC）符号以及海军损伤控制图。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 2.1 图1提供了过滤器、分离器和过滤器的符号。 2.2 图2提供了阀门的符号。阀门按以下标题分类:截止阀、角阀、止回阀、球阀、蝶阀、闸阀、泄压阀、歧管、控制阀、噪声控制阀和其他。 2.3 图3提供了阀门附件的符号，如致动器和锁定装置。图3所示的符号将与图2中的适当符号组合。 2.4 图4提供了管道系统相关仪表的符号。这些符号按以下标题分类:压力、温度、流量、液位、开关、警报和其他。 2.5 图5提供了风扇、泵和涡轮机的符号。 2.6 图6提供了管道组件的符号。 2.7 图7提供了管道和管件的符号。 2.8 图8提供了噪声控制组件和名称的符号。这些符号通常用于潜艇设计。 2.9 图9提供了转换的符号。这些符号标识过渡，例如管道材质或管道明细表更改。 2.10 图10提供了各种组件的符号。这些是无法归类在上述类别下的组件。示例包括热交换器、烧瓶和海水箱。 2.11 图11提供了沟槽管道的符号。

1.1 This practice establishes piping system drawing symbols for marine use. 1.2 This set of standard symbols is intended for use on piping system diagrammatics and arrangements for ships. 1.3 Where graphical symbols are required for an item or equipment not covered by this practice, the form and character of the symbol will be left to the discretion of the activity concerned, provided that the symbol used does not duplicate any of those contained herein, and is clearly understandable, subject to one interpretation only, or explained by a suitable note on the drawing when necessary. 1.4 Since symbolic representation does not usually involve exact or scale layout or the actual run or leads of piping, the same symbol may be used for all projections of the system (plan, elevations, and sections). 1.5 Symbols for fluid power, heating, ventilation, and air conditioning (HVAC), and Navy damage control diagrams are not included in this practice. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 2.1 Fig. 1 provides symbols for strainers, separators, and filters. 2.2 Fig. 2 provides symbols for valves. Valves are categorized under the following headings: globe, angle, check, ball, butterfly, gate, relief, manifolds, control, noise control, and miscellaneous. 2.3 Fig. 3 provides symbols for valve appendages such as actuators and locking devices. Symbols shown on Fig. 3 are to be combined with the appropriate symbol from Fig. 2. 2.4 Fig. 4 provides symbols for piping system–related instrumentation. These symbols are categorized under the following headings: pressure, temperature, flow, level, switches, alarms, and miscellaneous. 2.5 Fig. 5 provides symbols for fans, pumps, and turbines. 2.6 Fig. 6 provides symbols for plumbing components. 2.7 Fig. 7 provides symbols for pipe and pipe fittings. 2.8 Fig. 8 provides symbols for noise control components and designations. These symbols are generally used for submarine design. 2.9 Fig. 9 provides symbols for transitions. These symbols identify transitions such as pipe material or pipe schedule changes. 2.10 Fig. 10 provides symbols for miscellaneous components. These are components which could not be classified under the above categories. Examples include heat exchangers, flasks, and sea chests. 2.11 Fig. 11 provides symbols for grooved piping.