Steel Plate HSB 50 s Nb
Steel Plate HSB 50 s Nb
(OP)
I am currently working on replacing the floor in an existing crude storage tank. The problem is that the existing drawings show that the shell plate is HSB 50 Nb and trying to find a compatible plate to use for the annular ring. I am looking for the specifications for this plate or at least the material group in API 650 / 653.





RE: Steel Plate HSB 50 s Nb
RE: Steel Plate HSB 50 s Nb
Doing some google searching. HSB could be Hartford Steam Boiler- prominent company in insurance/inspection of boilers and pressure vessels. NB could be National Board. Now, I have no clue why a tank drawing would reference HSB & NB if that's what the reference is. I don't know what the 50 would be. Normally, the steel would be ASTM A-36 or ASTM A-131 Gr. B or something like that. I'm not aware that Hartford has or ever had steel specifications.
By the way, how big is the tank? How old is the tank? And does the tank nameplate or the drawings of the nameplate show a material?
RE: Steel Plate HSB 50 s Nb