In a water piping system we are replacing a 6" check valve with a gate valve (isolation valve) with much higher CV. What would be effect on thrust loads when valve is open? Is there any rule of thumb to have a rough estimate of its impact? Thanls for sharing your thoughts
We have 2 normally closed valves installed on a water line in our plant. One horizontally installed 6" Gate and another 6" globe valve downstream of it. Pressure upstream gate valve is 500 kPa(g). The isolated section of piping between these valves are filled with water at atmospheric pressure...
In our plant there is an anchor support that we would like to convert it to a guide. Support is made of a vertical HSS254x254x8 welded to a base plate which itself is bolted to concrete floor. A 6" CS standard horizontal pipe going through this HSS (thru 2 holes) and welded all around to it by...
In our plant we have a tank with capacity of 340000 lit. We intend to use instrument air and pressurize it to 20 kPa to look for leaks. A pressure regulating valve connects plant instrument air at 860 kPa through a 1/2" line to the tank and can provide 20 Kpa at 7.6 L/s. How long does it...
Consider a 12" pipe carryning water at 90 psig and an isolation valve which leaks. There is another valve downstream of this valve on the line. What pressure i could expect downstream this valve (in the section of pipe between these 2 valves) when both valves are closed and a long priod of time...
Our ducting is designed to +10 w.g., as a part of our system is a dryer. I noticed that shutoff pressure for dryer's blower is 15 w.g. My question is how to protect ducting in case of dryer/blower being started while downstream dampers are closed? What method or device you recommend...
We have a project to install aluminum piping for Breathing Air application in our plant. I just wondering if Victaulic connections can be used on BA piping. Is there any restriction using this type of connections with respect to applicalbe codes?
The piping will be installed indoors; design...
In order to dry a network of piping following their drainage, we intend to use a dryer and blow air into piping by establishing a closed loop (to use a hose to connect end of the line to fan inlet). My question is: Can we-at one point along this loop- vent part of the air into another branch...
We intend to put a number of pumps in our plant in lay-up state for a period of time. During this time we blow dry air thru piping system into these pumps from dehumidifier units. The air static pressure out of dehumidifier Unit is limited to 5" W.C. How much pressure drop one should expect...
In order to select a dryer to dry internal parts of piping & equipment after draining them from water, i need to come up w/ amount of water remained on wetted surfaces. Can anyone guide me to a table or formula to look into or calculate this amount. For piping a table that provides amount of...
To preserve piping and equipment in our mothballed plant, we intent to utilize desiccant dehumidifier to blow dry air in systems and maintain RH in range of 30-40%. Dryers will be installed indoor. I appreciate your insight on the followings:
1-What is governing formula for sizing the dryer...
Are there any codes and standard governing pressure vessels & piping submerged in water? Any ASME Standard in addition to ASME VIII out there that to be consulted? The pressure vessel subject of our design shall contain steam up to 40 psig & to be located in basement of a building that could be...
I am looking for reliability # for RDs. The one i am interested has a size of 10", and set pressure of 11 psig installed on a pipe that is filled w water. Furthermore I appreciate if you can provide a reference that lists the such reliability #s for different sizes/set pressures. For my...
As a part of N2 blanketing of a boiler & related piping, I need to determine the required pressure for N2 Supply. We have a few check valves on line. My question is should I consider the highest cracking pressure among the valves OR to add up cracking pressure for all valves (plus the...
Hi, i am in concepetual design for a project and would like to know if the folloiwng scenario is feasible:
Consider that there are 2 vessels V1& V2 that connected by a pipe and V1 supplies steam to V2 @ constant pressure P1. V2 has vent line to atm. equipped w/ a valve. Given the size of vent...
Should one include Water Heater & Mixing valves as a part of a domestic water pressure test? In this case hydraulic pressure specified in dwg is 150psig and P&T pressure setting is also 150 psig so i think not including the WH part of my test unless it is common/best industrial practice and...
Having ordered a 60g Elec. Water Heater for an industrial facility to be installed on a domestic water system, now noticed that WH P&T pressure setting is 150 psig whereas my system design pressure per flow diagram is 100 psig. WH vendor is not ready to change the RV to one w/ 100 psig set...
Hi:
I am involved in a project to install Oil Fired Boilers for heating steam. As an alternative to our DM water suppy we would like to convert our city Domestic Water to DM water. The saturated steam production of plant is in the range of 110,000 Kg/hr (242,508 Lb/hr). What type of water...
I am in process of oil fire boilers selection for a new boilerhouse. The required rate of heating steam supply for the boilerhouse is 100,000 kg/hr and the system unavailability as specified by owner is 1E-2. I used word availability and not reliability as it is a poised system. Based on...
In a power plant a blowoff line transfers water from boiler through a long line of 4"->6"->3" into a water channel and 10' under water. Line experience water hammer downstream b/o vlv as well as at 3" Tee before line entering the channel. Per P&ID Press.& Temp. downstream b/o valve are 300...
