MSC 215(82)里关于这个只写了There shall be a minimum of two stripe coats and two spray coats, except that the second stripe coat, by way of welded seams only, may be reduced in scope where it is proven that the NDFT can be met by the coats applied, in order to avoid unnecessary over-thickness. Any reduction in scope of the second stripe coat shall be fully detailed in the CTF.
三方协议里的在实际施工中还是有不符的,不用纠结这些,把握PSPC大方向就行了,你所说的后面的方法实际中好像用的较多。