API Spec 5CT-2001 Specification for Casing and Tubing (ISO 11960: 2001)

American Petroleum Institute (API). Seventh Edition October 1. 2001, Effective Date April 1.2002. 124p. This International Standard specifies the technical delivery conditions for steel pipes (casing, tubing, plain and casing lines and pup-joints) and accessories. This International Standard is applicable to the following connections in accordance with ISO 10422 or API Spec 5B:
short round thread casing (STC);
long round thread casing (LC);
butters thread casing (BC);
extreme-line casing (XC);
non-upset tubing (NU);
external upset tubing (EU);
integral joint tubing (IJ).