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and the ID of tube have exceeded in contrast with before installation..upper section of cross section of tube have about 3.7mm thickness and lower section have about 2.5 mm.

the thickness of tube have varied ....and the part of the tube that pose the direct flow of flue gases have a thin thickness...

designer of boiler: Waagner-Biro company material of tubes is appropriate for this application?

I work in a power plant (4unit, each unit 150MW, total: 600MW). We have a big problem in the boiler of the units. The supporting tubes wich hang the supperheater and reheater tubes; fail after about 5 or 6 years in each unit( I am not sure about the number of years). Please see the attached...

thanks from Pumpsonly.

what are parameters determine the quantity of flow in a pump? 1- D of impeller 2- Rpm of shaft and what are others?

diffuser after the impeller of the pump...for converting of velocity to pressure it must be change the area (A) for changing the V and then change P? is it true? increase A ----- decreasing V ---- and so ---increase P why we must change the velocity to pressure in pump by diffuser ? pressure...

how?

How can the diffuser in pump convert velocity to pressure? Increasing of cross section of flow? is this along with energy loss?

There is two 3000 m3 storage tanks (two pool of water) for feeding demineralization plant. We have two parallel pumps (2*100%) for demineralization plant. Occasionally we have shortage of water so we want to use a reverse osmosis unit. Is there any problem to use common header for feeding...

what is the most important problems in reverse osmosis operation? we must use a unit of reverse osmosis continuously or not? membrane must be in wet and pressurized condition all of the time?

i work in a power plant (1600MW: 4*150MW) in the past we did chemical cleaning only for water wall tubes beacuse the risk of turbine blade damage. at this time in the water wall tubes, deposit is 350 gr/m2. but in the supper heater tubes, it is 450 gr/m2. we have the base 400gr/m2 (in water...

when can we titled a pump as a booster pump? what is the purpose of term " booster " ? thanks for attention.

Dear cobalt1983 so it is normal to place probe of pH meter (after reading) in KCl buffer solution?

is that true that probe of PH meter(after reading the PH) put in KCl solution before the next reading? or it is wrong method. we have problem and must calibrate the PH meter after short period and i think it is may be from this operation.

i searched but i couldn't find reaction between brass and sulfur. is it possible for you (mr. rmw ) to find it? thanks.

ring ID is equal for both. state of adjacent journal bearing is good.

purity of H2 is about 98%.

Hi. Especially thanks from mr. rmw and mr.byrdj. The seal oil ring is at the CE section. I think this a pitting accident because at the adjacent of the pitting we can see tracks ( physical effect of something responsible for pitting) If it is pitting why this is black? It must be the same...

Mr byrdj why did you distinguish this problem as a arching effect? do arch have a especial sign? thanks.