规定了测定排放到大气中的管道、烟囱和烟囱中气流速度和体积流量的手动方法。指定使用两种类型的皮托管（L型和S型），以确定每种类型皮托管的速度和体积流量。适用于采样点密度、温度、流量和压力基本恒定的气流。

Specifies manual methods for determining the velocity and volume flowrate of gas streams in ducts, stacks and chimneys vented to the atmosphere. Specifies the use of two types of Pitot tubes, type L und type S, for determining the velocity and the volume flowrate for each type of Pitot tube. Applies to gas streams with essentially constant density, temperature, flowrate and pressure at the sampling point.