Upon review of our internal procedure covering "hot tap" connections and associated testing, I've found a lot of discrepancy on acceptable calculation methods to determine appropriate external hydro test pressure and the required wall thickness to support it.
We often perform "hot tap style"...
Is there any document(s) that lists each ASTM material number and defines the associated metallurgical content, intended use, manufacturing methods, etc? I've found a few nice websites here and there, but figured ASTM would likely have a document.
Can you successfully use a reduced size and/or port valve in place of a restrictive orifice plate? I have an 1.5" sump pump discharge line that is much shorter and of less elevation than originally designed for. The change has caused the pump to operate way off the right side of the curve. I...
Does ANSI A112.5.1 still exist? I'm having a hard time find anything recent. What I do find from ANSI pertaining to ductile iron piping and fittings is A21.10 and accompanying documents. Our old plant spec requires materials to conform to ASTM A74 and AWWA C110. Researching C110 often labels it...
I'm looking to run a ~3600' 3" line to transfer contaminated water. We will be using a lot of line that is currently not insulated or steam traced. The cost of the entire project would be greatly reduced if we could forego adding the tracing and insulation. Due to pump automation, we cannot have...
We are currently looking into noise reduction of our DI system. I am not up on all of the details just yet, like level of dBA reduction and the problematic frequencies, but I wanted to get a feel for what options are out there. I attended a noise control engineering training session about a year...
We are currently upgrading our brine squeeze system, for cleaning our DI trains. The current piping is PVC, and has experience severe failures. The solution we are pumping is 10% NaCl, 1% NaOH, and the rest is currently DI water. We are switching the DI water out for recycled Cation water which...
A couple of recent tube leaks have turned into a larger headache. The leaking tubes were plugged, only to show they were still leaking in between the steam drum and tube. They could not be re-rolled due to the plugs, so it was decided to seal-weld around the tube. When pressuring up with air...
Currently using Rockwell-Edwards V317 3/4" for our BFW pump case bleeds. Operating pressure is typically >1700psi. These valves have a history of not sealing after being used to warm up the pump. I have found some history of Rockwell-Edwards valves being notorious for packing gland follower...
Currently using Rockwell-Edwards V317 3/4" for our BFW pump case bleeds. Operating pressure is typically >1700psi. These valves have a history of not sealing after being used to warm up the pump. I have found some history of Rockwell-Edwards valves being notorious for packing gland follower...
Our plant is looking to upgrade our sulfuric acid piping. Carbon steel is the current spec, which we will probably stick with for the transfer lines that handle only ~98% sulfuric at ambient temps with 40gpm. The problem area is our regen skids for our DI water systems. The mixing tees dilute...
