最近的标准在不影响性能的情况下，定义了厨房排气管道中较低的最低风速。钢导管通常规定为标准钢制表壳厚度，能够处理高温、可能的腐蚀条件和排气管内的负压水平等极端载荷条件。本文模拟了一个典型的厨房排风管在极端温度条件和低风速下的穿孔。较低的排气速度应与较低的风管负压值相对应，因此，钢风管壁厚可能会减小。计算流体力学（CFD）/热应力分析是在最近发布的标准规定的最极端荷载条件下进行的。该分析表明，较低规格的钢导管厚度比最新标准中规定的厚度更充分，因此，可以使用较低规格的钢导管厚度。 引用:2016年年度会议，密苏里州圣路易斯，2016年交易，第122卷。2.

Recent standards have defined a lower minimum airvelocity in kitchen exhaust air ducts without compromisingperformance. Steel ducts are usually specified to a standardsteel gage thickness capable of handling the extreme loadconditions of high temperatures, possible corrosive conditions,and negative pressure levels within exhaust duct. Thispaper simulates a typical kitchen exhaust air duct performingunder extreme temperature conditions and low air duct velocities.Lower exhaust air velocities should correspond to lowerin-duct negative pressure values and, therefore, possibly areduction in steel duct wall thickness.A computational fluid dynamics (CFD)/thermal stressanalysis was carried out under the most extreme load conditionsspecified under recently issued standards. This analysisdemonstrates that a lower-gage steel duct thickness is morethan sufficient than what is specified in recent standards, and,therefore, a lower-gage steel thickness can be used.