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Inspecting Vessels: Part 2 – Stainless Steel, Carbon steel, and Hastelloy

vesselsWelcome back for another round of EquipNet Equipment Expertise! For starters, if you have not read the first article in this Vessels series, please check it out here.
As promised in our first post, this second article will focus on the tips and techniques that will help you properly inspect a carbon steel, stainless steel, or hastelloy vessel.  These three materials of construction (MOC) represent the full gamut of quality when it comes to vessels.  Carbon steel, known for its heightened susceptibility to corrosive materials, represents the lower end of quality. Stainless steel is the sturdy and resolute industry standard, representing the middle-ground MOC, while hastelloy, included in the class of “superalloys”, is the extremely corrosion-resistant MOC that sits atop all other options.

Whether the vessel is jacketed or single walled, the MOC is important to note, since you will receive different levels of durability from each. It goes without saying that the more durable a vessel is, the more likely it is t be in great condition, despite having been used for a period of time.

Gathering all relevant information

As stated in the first article on how to inspect a vessel, the first critical step is to gather all of the documentation associated with the vessel in question from the seller.
This includes the following:
Access to the vessel’s nameplate, which provides such critical information as:

  • Serial number
  • Model number
  • Date of construction
  • Confirmed operating pressures (if the vessel is pressurized)
  • A.S.M.E (American Society of Mechanical Engineers) number
  • National Board Code number
  • Original maintenance and service documents
  • Documentation confirming the vessel’s material of construction



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