As the CMOS technology enters the deep submicron design era, the richness of the computational resources brings about a lot of problems, such as clock distribution, clock skew and high power dissipation. Asynchronous circuit style is an efficient approach to solve the problems, and it is becoming significantly attractive to the designers. The design of asynchronous pipelines is a very important issue in the process of designing asynchronous microprocessors. In this paper, various pipeline structures are summarized and their asynchronous equivalents are presented, and then an asynchronous flow is proposed, aiming at speeding up the asynchronous circuit design. Finally, the flow is used to design several asynchronous pipelines. The experimental results show that the asynchronous technique can reduce the power consumption of microprocessor effectively.