Hello All:
I have a question regarding the temperature limit of SA516 gr.70 for graphitization
I'm operating a reactor made from SS304 but has a body flange and blind flange made from SA516 gr.70. The operating temp of the reactor is 450 deg c - 465 Deg C
ASME section VIII, part D, section...
Hello All:
I have a pump which is way oversized. The pump best efficiency point is 450 gpm at 150 feet of head
My process requirement is only about 220 gpm at 80 feet
The motor horsepower is 20 hP
I want to slow down the pump to reduce flow and head
I have two options a) Trim the impeller...
Hi All:
I have a non-code pressure vessel with a design pressure of 15 psig. The vessel has PSV set at 14.99 psig with a specified backpressure of 6 psig. The backpressure is wrongly specified since the outlet of the PSV is routed to atmosphere. The maximum backpressue the PSV can see is...
Hello Experts:
I need an expert opinion: I have a centrifugal pump running in thermic fluid service. The original design data sheet indicates the pump was sized for 300 GPM at 171 feet of diff head. The design of the pump is based existing and future expansion project. The expansion is yet to...
Hello All:
need your help..
I want to read the differential pressure across the pump accurately. see the attached sketch
There is a electric heater on the discharge of the pump
I have a suction gauge very close to the pump and the discharge gauge tap is located on the heater outlet roughly...
Hi All:
So there is a small problem I'm facing and need your help..
I'm operating a thermal oil system (Therminol 72) at 320 Deg C. On the expansion tank there is a forward pressure regulator on the inlet N2 line and there was also a forward pressure regulator on the N2 vent line. The set...
Hi All:
I'm operating a thermic oil system in my plant with an operating temperature of 380 Deg C with Therminol 72. I'm changing the expansion tank vent line forward pressure regulator with a backpressure regulator to hold constant static pressure inside the tank and also to minimize the N2...
All experts:
I'm having bit of a problem with my Thermic oil pump
It is a Dean model 4144 high temperature pump 3x4x8.5. The thermic oil is Therminol 72 with a maximum operating temperature of 380 Deg C and the pump has a John Crane mechanical seal model 609
There had been three cases when the...
Dear Experts:
Need your advice:
On top of a 1000 gallon vessel, there is a 8" 150 lbs SORF flange
I'm planning to install a 6" rotary airlock valve with an approximate weight of 300 lbs
Questions : Can the 8" flange take the load of the rotary valve or do I need additional support?
Thanks...
Hello Experts:
Need your advise in designing an electrical system
I'm designing a screw Auger system for conveying solid material from ground to inside of a tank. Based on the solid loading and the solid flowrate the calculated rated power is about 1-2 hP. I want to use a 4-5 hP motor with VFD...
Ok, experts need your opinion on this..
I'm designing a cooling glycol circulating pump which is used to cool the inter-coolers and after-cooler of a fairly big Nitrogen compressor. This is a closed loop system where the pump discharges in an air cooled Heat exchanger, then to the compressor...
Dear Expert:
Need your help
I'm looking over a NPSH test for a centrifugal pump. The vendor had tabulated this report for 8 points over varying suction pressure. The cut-off is 3% dH/delta H. At this point the NPSH is 1.969 meter.
The vendor had done this test using water while the pumping...
I'm sizing an centrifugal pump for a water service in a close system. The system starts from the surge tank, pump, few heat exchangers and complex piping network. Eventually the pump discharge comes back and joins the pump suction. The surge tank is 30 ft elevated and is the highest point in the...
Hi All,
I've got a process stream at 390 deg C and wants to cool up to 38 deg C using cooling water at 29 deg C. I understand to limit the pipe wall temperature at a high process inlet temp. I have to cool/temper the process sream with air up to a certain temp and then intoduce into the H-E...
HI All,
To calculate thickness of the pipe. I am looking for the values of coeffiicent (Y)for Inconel 600 and Inconel 625. ASME B313.3 list the Y vaues for Ferritic steels and some others but not for nickel alloys.
Can anyone help me out.
Thanks in advance.
Asif Raza
I am designing a tempered syltherm system. I've got three H-E in the network. Two of the H-E's are coolers in which sylthermm is heated from 100 deg C to 110 deg C. The third exchanger is a heater in which syltherm is cooled from 100 deg c to 90 deg C. I'm proposing a system in which syltherm is...
I'm designing a pump where liquid is pumped to a vaporizer and then to a 40 ft raector. The specific gravity of the liquid is 3000 kg/m3 and that of a vapor is 3.3 kg/m3. Can somebody tell me how to predict static head and diferential pressure accurately?
