【Daily Question】Utility Engineering - Water Supply and Drainage - 20191003
Thread Content
In a certain design drawing, the pipeline is designated as “DN50”; which representation of it is correct? ( ) A. The outer diameter of the pipe is 50 mm ； B. The inner diameter of the pipe is 50 mm ； C. The average diameter of the pipeline is 50 mm ； D. The nominal diameter of the pipe is 50 mm. Answer: D
D. The nominal diameter of the pipe is 50 mm
B. The inner diameter of the pipe is 50 mm；