Bl This standard establishes the procedures for the extraction of samples of crude oil and its byproducts, except gases, intended to carry out quality tests. B-2 Given the multiple conditions and circumstances that may arise in the extraction of oil samples and byproducts, it is accepted that in certain particular cases judgment and personal experience prevail, but always taking into consideration the general directives given in this document. rule. B-3 When it is necessary to establish special conditions for certain products, they will be indicated in the respective standards, following the stipulations of this standard in what is not established in them.