FOREWORD AND OBJECTIVES The objectives of this code are (1) unification of the methods used in measuring@ sampling and calculating the quantities of petroleum and its products transported in non-pressure type cars@ (2) establishment of instructions and special procedures as a basis for agreements between consignor and consignee@ and (3) standardization of the methods used for calibrating tank car tanks. The code should serve the Industry as a vehicle for initiating uniform practices in handling tank car shipments and receipts of liquid petroleum products but the code does not apply to products which must be weighed. In addition@ the procedure outlined in the code can be included@ if desired@ as an integral part of inter-company contracts covering the purchase and sale of crude or its products in tank car lots. This code has been prepared through the cooperation of a large number of companies under the supervision of the Committee on Measuring@ Sampling@ and Calculating Tank Car Quantities of the API Division of Transportation and it is hoped it will serve as a basis for company procedure. Modifications of the code will be required and the Committee requests any suggestions or comments to the end that necessary revisions can be made to enhance the value of this work in the Industry.