Hello all,
Does anyone know of specific guidelines/standards/documented best practices that specify the largest diameter a valve of a given class and type should go without a gear operator? Vendors' catalogues show that many supply valves with gear operators from 2" and up, though I haven't...
Dear all,
I've been tasked with reviewing the piping materials specification for a gold plant project that calls for HDPE pipe for the following substances, all at ambient temperature, though exposed to the sun in a tropical area:
- 20% w/v sodium cyanide solution
- 33% w/v hydrochloric acid...
Dear all,
When used within the pressure-temperature rating given by an applicable standard, such as MSS SP-70, is there a code related reason for most gate valves to be specified in carbon steel instead of cheaper gray iron? I looked through ASME B31.3 and found only this paragraph related to...
I posted this under the piping engineering forum, but I'm not sure if this forum isn't more suitable, as this post focuses on piping materials.
I'm a young engineer with a little over three years of working experience as a piping materials engineer. Right now I'm feeling overwhelmed...
I'm a young engineer with a little over three years of working experience as a piping materials engineer. Right now I'm feeling overwhelmed.
Engineering as a whole in my country was heavily impacted by some events in the recent past, and most of the seasoned engineers either switched fields...
Hello,
Many tubing manufacturers recommend a minimum wall thickness for tubing used in gas service. The reasoning behind that is that a heavier wall has a greater capacity to resist ferrule actions and coin out defects that might enable a leak path for gas molecules (for example, Swagelok's...
Hello, all,
I've read around these forums and have come across a seeminlgy consistent opinion that post-weld heat treatment is not a recommended pratice for duplex stainless steels on account of the possible formation of a deleterious phase in the material.
What is making me uneasy about this...
Hello all,
As per a client requirement, certain treated water and instrument air lines have stainless steel lines that branch off to galvanized steel pipe, which are threaded in accordance with our pipe spec.
In specing SS threaded half-couplings and threadolets for these branch connections...
