Pipe sections

After preliminary shop tests on different mockups (e.g. superheater and reheater headers and steamline pipe sections), since 1996 AEBIL systems have been installed and are at work on several power plant components. In particular, three different components have been monitored throughout 1997 (monitoring still under way at the time being) ... 

A separate equation is obtained for each component i Consider the important case of steady-state flow of a single fluid through the pipe section of Figure 21b, where the flow is taken to be perpendicular to the cross sections and Making use of the concept of average velocity ... 

Cascade coolers are a series of standard pipes, usually manifolded in parallel, and connected in series by vertically or horizontally oriented U-bends. Process fluid flows inside the pipe entering at the bottom and water trickles from the top downward over the external pipe surface. The water is collected from a trough under the pipe sections, cooled, and recirculated over the pipe sections. The pipe material can be any of the metallic and also glass, impeiMous graphite, and ceramics. The tubeside coefficient and pressure drop is as in any circular duct. The water coefficient (with Re number less than 2100) is calculated from the following equation by W.H. McAdams, TB. Drew, and G.S. Bays Jr., from the ASME trans. 62, 627-631 (1940). 

An emergency system water pipe section was removed because of reduced flow. In places, as much as 40% of the internal cross-sectional area was blocked by tubercular growth (Fig. 3.1). 

L-shaped pipe section of 2 in. (5 cm) carbon steel pipe socket welded to a 90° carbon steel elbow... 

Uneven wear in parts is often due to turbulence. Bad piping designs or poorly sized valves can cause turbulence and uneven wear in pumps. Whenever possible, use straight pipe sections before and after the pump. Uneven flow creates turbulent flow and excessive wear occurs. 

Table 5-2 Corrosion rate and specific coating resistance r ° after a long exposure of steel pipe sections with damage-free coating.

The cathodic effectiveness of the passive steel in cement mortar can be seen in Fig. 5-13. The cell current is measured between a mortar-coated DN 100 pipe section and an uncoated steel ring 16 mm broad as anode. It can be clearly seen that the cell current immediately falls and after 100 days goes toward zero. The same result is obtained by removing the specimens and aerating the mortar coating and repeating the experiment with the same components [51]. 

Ensure effective separation between piping sections of dissimilar metals. Examples of this are illustrated in Figure 2.5. As shown, dielectric nonabsorbent gaskets of adequate thickness can be inserted between dissimilar... 

Piping - Sections of piping in any liquid service, whether onsite or offsite, which can be blocked in while liquid filled and subjected to liquid thermal expansion from subsequent heating, must be protected by either. 

Temporary Pipe Section Fig. 7.1-6 Temporary Repair ai Flixborough... 

Broschka et al. (1983) report results of experimental tests on parallel plate flame arresters in piping systems. Tests were conducted on 3-inch and 6-inch diameter parallel plate flame arresters installed in 3-inch and 6-inch diameter piping sections using butane-air mixtures to generate a flame. The ignition source was varied from 3 to 43 feet from the flame arrester. The flame speed varied between 0 to 20 ft/s, and when the flame speed was 20 ft/s, the flame passed through the arrester (flame arrester failure). 

The fire at the ruptured pipe produced flame heights of up to 120 m (400 ft). It was left burning until the valves were shut off to isolate the failed pipe section. 

Temporary Pipe Section Figu re 1.3.1 Reactor Sequence,... 

The residence time of tlie vapor in the pipe section is less than tlie ignition delay time. Therefore, ignition will not take place. 

Wave Gas flows in top of pipe section, liquid in waves in lower section... 

Pipe Section Rate Factor for Single-Acting and Double-Acting Cylinders... 

While the modified energy equation provides for calculation of the flowrates and pressure drops in piping systems, the impulse-momenlum equation is required in order to calculate the reaction forces on curved pipe sections. I he impulse-momentum equation relates the force acting on the solid boundary to the change in fluid momentum. Because force and momentum are both vector quantities, it is most convenient to write the equations in terms of the scalar components in the three orthogonal directions. 

Rolled, molded or cut to shape as annular cylinders for the insulation of pipes. Pipe sections are made in one or two segments but occasionally in three or four. Sizes are available for most steel and copper pipes of up to approximately 1120 mm outside diameter. 

The uncured wool from the forming conveyor is separated into pelts , which are converted into pipe sections by being wrapped around a heated mandrel, and the wall thickness set by counter rollers. The sections are then passed through a curing oven before being trimmed, slit, covered and packaged. 

A wide product range, from lightweight mats through flexible and semi-rigid, to rigid slab. Pipe sections, loose wool, blowing wool, molded products and mattresses. 

Lightweight mats, flexible, semi-rigid and rigid slabs, pipe sections, loose wool, blowing wool mattresses, sprayed fiber, lamella mats. 

A wide basic range of blankets, slabs, block and pipe sections, especially molded products, felts and gaskets. 

Rigid slabs, pipe sections, beveled lags and molded products. Also as a powder mix for use in wet cement form. 

Rigid slabs, pipe sections, beveled lags, molded products. 

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