Which sea friend knows the meaning of the specification numbers for the tower?
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For example, φ4600*58000*（14+3）*（18+3）*（20+3); the diameter and height are known, but what do the remaining parts mean? There are also those with a diameter*height* of (22+3)/34/36/38 – what do (22+3)/34/36/38 represent respectively?
I wonder if it’s the wall thickness plus corrosion margin?
The numbers that follow represent different wall thicknesses: 18+3 for the lower layer, 14+3 for the middle cylinder, and 12+3 for the upper cylinder. Here, 18 mm refers to the thickness of the carbon steel substrate, while 3 mm refers to the thickness of the cladding material. The material used for the tower should be composite plate material
Composite panels are all represented by adding several numbers together.
φ4600*58000*（14+3）*（18+3）*（20+3); this tower is constructed by welding together three sections with different wall thicknesses, the thickest one being at the bottom. The numbers in parentheses represent the wall thicknesses. The notation 14+3 indicates that the material is a composite plate, with a base thickness of 14, combined with 3 layers of thick special material.
Personally, I think it is the thickness of the cylindrical composite panel. Normally, however, the thickness of the coating should be stated first, such as 3+12.
(22+3)/34/36/38 are the thicknesses of each section, with some of them being composite sheets
Behind are the plate thicknesses at different heights plus the corrosion margin; in the case shown below, only the top plate has a corrosion margin, while the others do not
It indicates the wall thickness; for composite panels, the standard laminated thickness should be specified before the thickness of the base layer
(14+3)*(18+3)*(20+3); your tower is made up of three tube sections with different wall thicknesses, welded together. The notation 14+3 indicates that the material is a composite plate: the thickness of the base material is 14, with 3 layers of thick special material added to it