The calculation method of steel pipe support in current specifications is not uniform, and it unsafe to directly apply the stability coefficient vertical bar code, which leads frequent safety accidents fastener supports. Through field statistics initial defects pipe, found that bending values 3 m 6 pipes with largest size are larger L/400. table obtained by taking L/400 as defect, 43.15% smalle...

Spatially regulated transcription of the pipe gene in ventral cells of the Drosophila ovary follicle cell epithelium is a key event that specifies progeny embryo dorsal-ventral (DV) polarity. pipe encodes ten putative protein isoforms, all of which exhibit similarity to vertebrate glycosaminoglycan-modifying enzymes. Expression of one of the isoforms, Pipe-ST2, in follicle cells has previously ...

In-pipe inspection robots have proven useful in examining the inside of pipes without affecting their structure, therefore, interest researching these has constantly increased over time. There are many different types robots, but most commonly used wall pressed type. This paper proposes a review type terms adapting mechanisms. By mechanism is meant simple linkage or combination linkages, with a...

This paper describes development of a three somites earthworm type mobile inspection robot which is able to move in long pipes. We have many small diameter pipes which are gas or water pipes for individual or corporate houses and boilers or hot water pipes for industries. They are settled in the ground horizontally or in the narrow spaces vertically and some of them are covered by casings or ha...

A model coupling fluid hydraulics in a borehole with fluid flow in an aquifer is developed in this paper. Conservation of momentum is used to create a one-dimensional steady-state model of vertical flow in an open borehole combined with radially symmetric flow in an aquifer and with inflow to the well through the wellbore screen. Both laminar and turbulent wellbore conditions are treated. The i...

To solve the high slurry pressure and severe wear at some sections in backfilling pipelines, this study investigates solution of using an auxiliary pipe to increase resistance reduce mine pipeline. Using computational fluid dynamics, three models, a Z-shaped pipe, S-shaped spiral were constructed velocity distribution characteristics filling pipes analyzed. The function friction loss with diffe...

Abstract Corrosion and erosion are the common pipe-integrity issues that occur when carbon dioxide, hydrogen sulfide sand exist in gas stream at same time. is developed by reaction among iron, while physical damage through flowing sand. When it comes to prediction model which could accommodate both events, complex phenomena related physics, chemistry metallurgy should be put into account. In th...