The main technique feature of offshore tug cementing operation pattern was introduced in this paper,including configuration,pipeline layout and points of field opera.

Based the characteristics of the cryogenic methanol-washing system for coal-based synhesis plant,the special piping requirements inengineering design are summarized in this artical for the designer' referrence.

The results showed that the improved software is suited to the piping layout design standard of China.

The change of heat transfer coefficient and the vapor lock make the tube bundle arrangement correction factor change with load.

The change of condenser steam flow field causes the changes of its heat transfer coefficient and the vapor lock,with the analysis on the change of the tube bundle arrangement with the alteration of the steam flow field,proposed the change scope of the correction factor of the arrangement of condenser tube bundle with the alteration of the condenser steam flow field.

Based on measured data of Xingtai power plant, the paper improves traditional valuation method of condenser tube bundle arrangement correction factor.

Through the forms of drainage tubes,it makes illustration in detail on each kind of tube layout and pavement,emphasizes the skill needs of some key parts and sections,meantime,it points out the importance of coordination with equipping in construction.

It discusses the daily drainage design from system,tube materials,appendix,venthole,tube layout and pavement as well as rain-water drainage,and analyzes problems which should be noticed during drainage design,so as to improve the general designing level of ours.