ASTM B687 - STANDARD SPECIFICATION FOR BRASS, COPPER, AND CHROMIUM-PLATED PIPE NIPPLES Organization: ASTM Date: 1999-04-10 Description: This specification establishes the requirements for brass and copper pipe nipples in standard pipe sizes from 1⁄8 to 8 in., inclusive, in standard lengths, and chromium-plated pipe nipples in standard pipe sizes from 1⁄8 to 2 in., inclusive, in standard lengths. 1.1.1 Chromium-plated pipe nipples ordered under this specification are intended for interior use in decorative applications.