peaking measurement method
peaking measurement method
(OP)
can anybody let me know how we must measure peaking, when we use the template,we can fit the template in one side to shell and measure the distance between other side of template and shell.
in this case it seems that peaking is half of this distance, is this correct or not.
in this case it seems that peaking is half of this distance, is this correct or not.





RE: peaking measurement method
American Petroleum Institute (API) Publication 650, Standard for Welded Steel Tanks for Oil Storage, paragraph 5.5.3 specifies that with a horizontal sweep board 36 inches long, peaking shall not exceed 1/2 inch.
Peaking is when the vertical shell weld or weld joint is not properly fitted and it makes a peak at the joint. Sometimes this is caused because the shell plate wasn't properly rolled. The radius of the tank in that area will not be correct. It is checked by cutting a 36 inches long board to the outside radius of the tank, holding the board against the weld, and measuring the distance between the board and the tank shell. If the weld or joint holds the board more than 1/2 inch from the shell, then the joint has too much peaking.
RE: peaking measurement method
measurement.
please take a look at enclosed file, which method is correct, a or b?
thank you.
RE: peaking measurement method
RE: peaking measurement method
Method A is the correct one.
RE: peaking measurement method
we have a 20m fixed supported storage tank which plumbness and roundness and levelness are ok, but in 4 point peaking and banding was measured in b method and reported as 40 mm.
what is your opinion?
thank you
RE: peaking measurement method
RE: peaking measurement method
If we can not meet the tolerance we have to fix it.
Off course there was some cases that the client or QC manager or tank designer will accept as it is.
Syah