I understand that the IECC is intended to limit energy use in facilities, in balance with first costs.
So, I was surprised that an architectural colleague thought that the IECC (commercial provisions, 2009) would not apply to an interior space to which we are considering adding air...
The 2-phase equation in Part II of API 520 latest edition does not seem to provide results consistent with the API 520 gas/vapor or ASME B31.1 App. 2 steam equation, when the vapor fraction goes to 1.0. I get results about 5 orders of magnitude higher with the API 2-phase equation (seems out of...
Would the 2006 Edition of IBC/IFC consider steam to be a hazardous material?
This in effort to determine whether the seismic provisions apply for restraint of steam piping. So, ASCE 7-2005 also factors in, and whether steam is considered hazardous, determins the Occupancy Category in ASCE 7...
Is it possible to estimate whether the initial fatigue crack size exceeds 1 micron in Type 316L (A270) without a background in fracture mechanics or metallurgy?
In other words, is the science of crack initiation accessible enough that someone with a mechanical engineering background, not...
Process Industry Practices (PIP) publishes PNC00004 - Piping Flexibility Analysis Criteria for ASME B31.3 Metallic Piping, which outlines minimum basic requrements for analyzing aboveground metallic piping systems for flexibility. It was last published in 2000.
Anyone familiar with this...
I want to have a nondestructive evaluation for surface cracks performed in carbon steel fittings at a service temperature of 650 - 700 Deg. F. I understand that use of liquid penetrant or magnetic particle methods would require a shutdown.
A local inspection firm is investigating use of high...
For flexibility design I interpret B31.3-2004 to require the design pressure & temperature to be the most severe condition of coincident pressure and temperture that can occur, and is not tied to the duration of the event. (The event would obviously have to have a long enough duration to heat...
I've seen "Free Thermal Analysis" or "Free Thermal Expansion" referenced as a step in piping stress analysis and do not understand exactly what this means and how useful it is to perform.
Do analysts routinely use a free thermal analysis when designing a new system?
Or is it more useful in...
For a 100 psig plant compressed air system with five (10,000 scfm) compressors, three dryer/filters, how important or accurate must the air flow balance be to the dryer/filters for equipment performance and service life?
Would reverse return piping be very beneficial?
When steam flooding piping is designed, is the piping designed to remove the condensate or is the piping designed to carry the steam and condensate to the point of use?
I understand steam flooding is used to improve oil recovery. I don’t design steam flooding piping, or plan to do so. But I...
I’m wanting to model hygienic unions (bolted clamp joint) in a stress analysis program (Algor) during the line sterilization process (185 deg. F). Code is ASME BPE & B31.3. Mostly 4 and 6 inch size. The major manufacturers say that there is no available data for allowable forces and moments...
Typical suction piping design velocities are given as 4 - 7 fps (Crane TP410). What about the velocity in the plane of the face of the suction nozzle? Pump selections by pump application engineers are often much higher, 20 fps for example. Is there a guideline for a minimum pump suction size...
My understanding is that BS 806, which was withdrawn and replaced with BS EN 13480, did not stipulate drip leg spacing on long runs of steam main as the scope was limited to piping within the boiler plant proper. BS 806 stipulated a minimum drip leg diameter of 1/4 of the main bore.
I...
For large generating stations, do specific codes and standards govern the steam pipe sizing? What about low & high pressure return piping size, and the location/configuration of drips?
Is the sizing accomplished by power plant design engineers based on steam industry guidelines/best practice...
For gravity flow in a pipe, I want to determine flow depth for a given gpm, pipe ID, slope, and Manning friction factor. The flow can be assumed steady and uniform. Flow is less than 1/2 ID.
Is this an iterative process with the Manning equation and hydraulic radius or is there another...
How is steam hammer prevented in submarine piping, or maybe, is it prevented?
I assume the slope of piping on submarines changes as the vessel navigates. Where steam piping is installed, how is the piping designed to prevent steam hammer when the steam and condensate flow can vary from...
At what depth does the fluid level in a pipe produce waves resulting in slug flow? It seems to me that a thin film of fluid on the bottom of a pipe can not result in wave formation. But for a given high velocity at some point there is enough fluid (liquid hold-up, void fraction) to produce a...
At what depth does the fluid level in a pipe produce waves resulting in slug flow? It seems to me that a thin film of fluid on the bottom of a pipe can not result in wave formation. But for a given high velocity at some point there is enough fluid (liquid hold-up, void fraction) to produce a...
I assume the slope of piping on submarines changes as the vessel navigates. Where steam piping is installed, how is the piping designed to prevent steam hammer when the steam and condensate flow can vary from co-current to counter-current two-phase flow? Is there a specific velocity that is...
