We are in the process of revising our plant standard for stress relieving carbon steel piping welds in caustic service. From NACE recommendations stress relief should be performed to minimize caustic SCC for concentrations of 5% and higher in operating temperatures of approximately 120°F and...
While steaming out equipment during a maintenance shut down, we recently discovered a leak in our crude unit vacuum section transfer line. The line, which runs from the vacuum heater to the vacuum tower, is a 36” clad pipe. Materials for the base material is 1/2” thick ASTM A515 Grade 55...
We are in the process of replacing the high temperature effluent coolers in our Hydrogen plant. The exchangers are shell and tube type and we are planning to change the material to address a problem with carbonic acid corrosion. The plan is to install new 321 stainless steel tube bundles in...
we are in the process of installing new sulfuric acid piping in our water treatment facility, and I would appreciate any guidance on material selection for the following applications.
1. Pure sulfuric acid up to the dilution point. 66 be sulfuric acid @ ambient temp. We are planning to use...
