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As long as there is air, oxygen and other dissolved gases in feedwater, there will be pressure-loss-induced condensate, whether the steam is saturated or superheated. The feedwater will always contain air. It can also contain bicarbonates and carbonate alkalinities, which oxidize to carbon...

Can we have condensate in a superheated steam line?. I run a 300 psi superheated steam line that was sufficiently trapped and partly insulated. One of my service guys shut all the traps and the next day the whole line was full of water. Then somebody told my operator that the water was not as a...

Why do we have condensate in a superheated steam line? Apart from steam traps, how can we eliminate the formation of condensate in a superheated steam line. We deliver steam as if your life depends on it.

I installed a 1-1/2" Sierra flowmeter in our system that operates on 95 psi pressure and about 110 pounds per hour. The operating limits for the meter is at velocity of min 10 feet per second and maximum of 300 feet per second. After a month of operation the meter failed and the meter cavity was...

This is a new thread. I installed a 1-1/2" Sierra flowmeter in our system that operates on 95 psi pressure and about 110 pounds per hour. The operating limits for the meter is at velocity of min 10 feet per second and maximum of 300 feet per second. After a month of operation the meter failed...

Upon further reflection, I believe the term "acceleration head" in PD pumps is the "velocity head" equivalent in centrifugal pumps. The reason (at least in my opinion), why Karassik added velocity head term in calculating NPSHA is because in an existing installation, the gage does not register...

By ha do you mean velocity head? I need the clarification in order to answer your question, the term acceleration head is not acceptable in pump lingo. We deliver steam as if your life depends on it.

We are currently using foam glass to insulate our steam distribution lines at 300 degrees F and higher. Although expensive, it has proved very reliable. We deliver steam as if your life depends on it.

The exact pressure loss through fittings cannot be readily computed because of the geometry of the fittings. However, there is general industry consensus for the equivalent length of fittings in terms of the number of pipe diameters. For a 90 degree elbow, the equivalent length is 30D or 30...

Can somebody tell me the thermal conductivity of soil or any approximate k-value for soil (clay).Is there any formula I could use to compute this, or any formula for the heat loss for buried pipes, given the depth of the pipe, pipe size and steam temperature. We deliver steam as if your life...

I am evaluating a proposal for steam losses in a buried pipe, 8 feet underground, pipe length is about 500 feet and pipe size is 12 inches. Steam temperature in pipe is about 293 degrees fahr. Can somebody assist me with the k-value for soil (clay) or does anybody have a formula for computing...

Thanks TBP for your analysis, first we don't return our condensate and that is a major source of loss, second, can somebody explain to me why pressure compensation could reduce this problem, just curious, since most of the threads have mentioned it without stating the relative benefit. No, we...

Thanks Aberta, your thread is the most compelling hypothesis so far. By back pressure I suppose you mean the pressure right after the trap orifice, and not the critical pressure or the throat pressure at the orifice. The back pressure is usually less than the critical pressure, which in the case...

No we run the pressure for both winter and summer loads, of course, we have PRV's at customer sites that reduce the pressure as required. I am almost certain that our meters are not pressure compensated. The steam losses I am speaking of are line losses before the metering station. The meters...

If it is true that-according to POETIX99 - that more of the steam will evaporate at lower velocities than at higher velocities at the same pressure, then good insulation may alleviate this problem. If pressure compensation does not solve the problem according to the last thread, then how can we...

Some of our meters are shunt flow and some are condensate meters, neither is very good at low flows. we are currently shifting towards vortex flow meters We deliver steam as if your life depends on it.

I am generating saturated steam at 100 t0 150 psi. We deliver steam as if your life depends on it.

My summer steam losses (low load)are much higher than my winter losses (20% higher) under the same operating pressure but lower load. I thought my losses should be lower since my load is much lower in the summer (from 220,000 pph to 90,000 pph) at the same pressure of 100 psi. Can somebody...

I need to establish a standard for expansion joints and Anchors for steam distribution application, for pressures up to 250 psi. Currently, we use HYSPAN slip-type expansion joints, I don't want bellows for this application. I need as much opinion as possible, with the relative merits of HYSPAN...

Most of the responses to this thread are reasonable, steam velocity will depend of the pressure, size of pipe and specific volume of the steam. But to be sure, get the "HVAC Data and Rules of Thumb" reference. It is an excellent source of technical information for steam piping designers. I...