TAPPI TIP 0420-14的目的是提供一个指南，用于增加美国机械工程师学会认证的铸铁纸机干燥器的最大允许工作压力。在这个过程中，干燥器不会发生任何物理变化，这一过程被定义为？改变？根据国家委员会检查准则。可通过增加干燥器蒸汽压力来增加机器容量。这一好处可能伴随着机器速度的提高。机器速度的任何增加也需要被视为干燥器转速与内部压力应力的相加。本指南不涉及因机器速度增加而产生的附加应力的确定。本指南还提供了有关司法管辖和保险提供商认可的见解，在实施任何压力增加之前，可能需要这一点。 本指南不涉及最初未经ASME锅炉及压力容器规范认证的纸机干燥器。本指南不涉及在不承认ASME规范或遵循一套替代设计和制造标准的管辖区或国家制造的干燥器。对于未经ASME规范认证的干燥器，请在其他地方寻求指导。

The intent of TAPPI TIP 0420-14 is to provide a guide that may be used to increase the maximum allowable working pressure of American Society of Mechanical Engineers certified cast iron paper machine dryers. This process, in which no physical change is made to the dryer, is defined as an?alteration?by the National Board Inspection Code. Machine capacity may be increased by increasing the dryer steam pressure. This benefit may be accompanied by an increase in machine speed. Any increase in machine speed will also need to be considered as dryer rotational velocity additive to the internal pressure stress. This guideline does not address determination of additional stress due to increased machine speed. This guide also provides insight on jurisdictional and insurance provider acceptance, which may be required before any pressure increase is implemented.This guide does not address a paper machine dryer that was not originally certified to the ASME Boiler & Pressure Vessel Code. A dryer manufactured for use in a jurisdiction or country that does not recognize the ASME Code or follows an alternate set of design and manufacturing standards is not addressed in this guide. Seek guidance elsewhere for dryers that were not certified to ASME Code.