General All materials subject to test and inspection@ intended for use in the construction of hulls and equipment of vessels classed or proposed for classification@ are to be to the satisfaction of the Surveyor and in accordance with the following requirements or their equivalent. Materials@ test specimens and mechanical testing procedures having characteristics differing from those prescribed herein may be approved upon application@ due regard being given to established practices in the country in which the material is produced and the purpose for which the material is intended@ such as the parts for which it is to be used@ the type of vessel and intended service@ and the nature of the construction of the vessel.