Foreword a. This bulletin is under the jurisdiction of the committee on Standardization of Tubular Goods. b. This bulletin is not intended as a design manual. Its purpose is to provide minimum performance properties on which the design of casing@ tubing@ and drill pipe strings may be based. c. The performance properties as given herein cover the grades@ and weights of casing@ tubing and drill pipe as given in API Stds 5A@ 5AC@ and 5AX. d. Formulas and procedures for calculating the values herin are given in Bul 5C3.