TY - BOOK ED - American Petroleum Institute (API) TI - Conversion of operational and process measurements units to the metric SI System U1 - 389.9 PY - 1974/// CY - Washington PB - API KW - Sistema Métrico KW - Petróleo KW - Normalización KW - Estados Unidos N1 - 06291; Introduction. Scope and field of application. What is SI. Use of the appendix a conversion tables. Tables of recommended SI Units and conversion factors. Temperature conversion chart ER -