Flatness
Flatness
(OP)
Hi
How do you guys meassure flatness on the walls of an API 650 tank? ASTM A6/6M?
How do you guys meassure flatness on the walls of an API 650 tank? ASTM A6/6M?
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RE: Flatness
if it's just a local area, then follow this from 650:
7.5.4 Local Deviations
Local deviations from the theoretical shape (for example, weld discontinuities and flat spots) shall be limited as follows:
a. Deviations (peaking) at vertical weld joints shall not exceed 13 mm (1/2 in.). Peaking at vertical weld joints shall be determined using a horizontal sweep board 900 mm (36 in.) long. The sweep board shall be made to the nominal radius of the tank.
b. Deviations (banding) at horizontal weld joints shall not exceed 13 mm (1/2 in.). Banding at horizontal weld joints shall be determined using a straight edge vertical sweep board 900 mm (36 in.) long.
c. Flat spots measured in the vertical plane shall not exceed the appropriate plate flatness and waviness requirements given in 7.5.2.
RE: Flatness
RE: Flatness
RE: Flatness