Composite plate thickness marking

If marked in this way, it can only be understood as a minimum of 22 at the base layer, and a minimum of 3 mm for the coating layer.

This post was last edited by wuchangjian on 2017-5-17 at 15:52. The thickness of the composite board is given as the nominal thickness. For example, if a composite panel is made from 3mm stainless steel plates, then 3 should be indicated, provided there are no other special provisions in the contract. Under this understanding, for 22+3, the carbon steel portion is usually greater than 22 mm, while the clad layer is less than 3 mm; the thickness of the steel plate material has a positive deviation for carbon steel and a negative deviation for stainless steel. Additionally, explosive lamination causes thinning, so the thickness of the laminated layer is basically less than 3 mm. With current technology, without damaging the product, it is only possible to observe and measure the thickness of the base layer and the overlay layer from a side cross-section.

The thickness of composite panels is usually indicated with the coating on the front and the base layer on the back.

I suddenly remembered a real joke. A member of an inspection team from before had problems while driving at the project site; one of those issues was related to our composite material equipment. He came to investigate and asked us what 22+4 in the drawings meant. We replied that it referred to a base layer thickness of 22 mm for Q345R material, and a coating layer thickness of 4 mm for 316L material. He asked us to find the standard that specifies this notation, saying that if we couldn’t find such a standard, it was possible that the base layer was 22 mm thick and the coating layer 4 mm thick made of CS material As a result, I was left speechless and immediately at a loss for words.

It’s really impossible to deal with people who insist on doing things they don’t understand, haha.

Isn’t that right? We say that this specification for thickness is a practice that is universally adopted within the industry. Yet he insisted, saying, \"You designers need to be precise and adhere to standards; how can something that’s merely assumed or customary become a standard?\" ” What do you say we do? I still remember that incident vividly! Hehe

It is marked in accordance with standards, and the composite panel standards specify that the minimum thickness of the base layer must be no less than a certain value. The minimum thickness of the coating shall not be less than. This bid of yours represents the minimum thickness.

According to what’s said on the fifth floor, the coating is applied first and the base layer later; therefore, they have a basis for pointing out any irregularities, so it’s not unreasonable of them.:lol

I find you know so much; you’ve really studied it.