1.1 本规范描述了喷雾屏蔽材料的制造要求以及由该材料制成的喷雾屏蔽材料的制造和安装要求。 1.1.1 小节 2 – 14 解决喷涂防护材料的制造要求。 附件A1 阐述了喷雾防护罩的制造和安装要求。 1.1.2 图1 显示了喷雾防护罩的典型结构。 无花果。2- 6. 展示在各种机械接头上安装防喷罩的方法。 图1 喷雾屏蔽结构（典型） 图2 蝶阀护罩安装 图3 泵进口封头的喷雾防护罩 图4 单滤网的喷雾防护罩 图5 蝶阀防喷罩 图6 阀盖喷雾罩 1.2 防护罩用于内部压力超过26的液体管道系统中的机械接头（法兰接头、螺栓接头等）周围。 1磅/平方英寸（0.18牛顿/毫米 2. )除非合同要求另有规定，否则应防止易燃液体冲击热表面或因机械接头泄漏而导致液体冲击电气配电盘和部件。水头压力低于26.1 psi（0.18 N/mm）的所有吸入管线上均不包括防喷罩 2. )以及电气配电盘10英尺以上的非易燃液体系统中的机械接头，除非合同要求另有规定。 2. 1.3 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.4 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。

1.1 This specification describes the manufacturing requirements for spray shield stock and the fabrication and installation requirements for spray shields made from that stock. 1.1.1 Sections 2 – 14 address the manufacturing requirements for the spray shield stock. Annex A1 addresses the fabrication and installation requirements for the spray shields. 1.1.2 Fig. 1 shows the typical construction of a spray shield. Figs. 2- 6 show methods of installation of a spray shield on various mechanical joints. FIG. 1 Spray Shield Construction (Typical) FIG. 2 Installation of Butterfly Valve Shield FIG. 3 Spray Shield for Pump Inlet Head FIG. 4 Spray Shield for Simplex Strainer FIG. 5 Spray Shield for Butterfly Valve FIG. 6 Spray Shield for Valve Bonnet 1.2 The shields are intended for use around mechanical joints (flanged, bolted unions, and so forth) in liquid piping systems with an internal pressure exceeding 26.1 psi (0.18 N/mm 2 ) to prevent the impingement of flammable liquid on hot surfaces or fluids onto electrical switchboards and components resulting from a leak in the mechanical joint, unless otherwise invoked by contractual requirements. Spray Shields are excluded on all suction lines with a head pressure less than 26.1 psi (0.18 N/mm 2 ) and mechanical joints in non-flammable liquid systems in excess of 10 ft of an electrical switchboard, unless otherwise invoked by contractual requirements. 2 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 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.