Looking to communicate directly or through this forum with individuals with experience in pumping wood chips suspended in water. In order for the wood chips to "move along" would not the wood chips need to develop a shear force between the wood chips and the water. Is this the transport...
This is an ideal application for a reverse return piping configuration. With such a piping arrangement, flow is inherently balanced and will divide evenly. No balancing valves required. I have used this piping configuration on thermal oil piping to heat log ponds at an OSB Mill in Grand...
Consider a pipe supported from above. The configuration is a pipe clamp, threaded rod, turnbuckle, spring hanger (say a B-268 Size 10)and a Figure 66 welded beam attachment. The task at hand is the inspection of pipe supports and to ultimately determine their fit for service. Since the load...
Does anybody have any experience with direct bury insulated steam line? My application is a 4" X Sch 40 steam line at 300 psig and 430 degrees F. The bury length of the line is approximately 450 feet. The line has a 410 foot radius, 53 degree arc. My intention is to insulate the line with 3"...
Sort of. What happens when there is no vent pipe but rather just a safety relief valve and an elbow. The P1 calculation noted above is still 11.36 psia; sub-atmospheric so what is going on? Is there a shock wave with a step change in pressure between the SRV disc and the outlet?
Latexman, the 9 psia is a number that I calculated for an application recently. Try running the Appendix II calculation for the following:
Safety relief valve set pressure = 45.0 psig (59.7 psia)
T = 350 F
W = 85,175 lbs per hour of slightly superheated steam.
SRV is an 8" inlet by 10" outlet...
Hello Latexman,
I was away, hence my delay in responding. I include B31.1 Appendix II. This will explain or provide additional information to support my question.https://files.engineering.com/getfile.aspx?folder=cad30928-243d-4bda-b750-a67412c2da98&file=B31.1_Appendix_II.pdf
When calculating outlet pressure at the end of a vent pipe using the calculating procedures outlined in B31.1 Appendix II, what is the significance of a calculated outlet pressure of 9.0 psia? How does this physically occur that the pressure at the end of the vent pipe is sub-atmospheric? The...
In Appendix II in B31.1, there is a sample problem to determine pressures and velocities at the outlet of safety relief valves. In one of the examples, there is a calculated value is 118 psia for the calculated pressure at the outlet of the SRV elbow. My question is how can this pressure be...
