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3.6. Used Casing Where an operator proposes to install used casing in a well the operator shall: (a) determine and record the history of used casing including the manufacturer, manufacturer's specifications, and the previous application(s) of the casing; (b) examine the condition of the threads on the pipe and inside the collars prior to use in the drilling operations; (c) examine the condition of the pipe near the threads and near the casing collars to detect power tong damage and oval distortion; (d) conduct spot casing wall thickness measurements on every joint of casing; (e) conduct a hydrostatic pressure test to 110% of the maximum anticipated pressure during drilling, completion or production of the well to be held for 5 minutes; (f) not install used casing that is greater than 20 years old; and (g) provide for an Examiner to certify that all used casing has been inspected and tested in accordance with this section and is appropriate for its proposed use in the well. 3.7. Casing Installation The operator shall: (a) guide casing into the hole using guide shoes, mule shoes, Texas shoes, or centralizers; (b) determine the correct makeup torque or thread standoff for the casing; (c) clean threads and examine casing on location prior to installation; (d) examine for and clear all casing of intemal obstructions; (e) use thread compound on the casing joints; and (f) pressure test the integrity of all joints in the string either prior to or during primary cementing operations. 3.8. API Standards Operators shall adhere to the following American Petroleum Institute (API) guidelines in the design and installation of intermediate and production casings: (a) API Spec 5CT: Specifications for Casing and Tubing. (Note: This document lists chemical compositions, mechanical properties, testing requirements, and dimensional data for API certified casings.) (b) API Bulletin 5C2: Bulletin on Performance Properties of Casing and Tubing. (Note: This document tabulates collapse and intemal yield pressures, and joint strengths for APl certified casings and tubing.) (c) API RP 5A5: Recommended Practice for Field Inspection of New Casing, Tubing, and Plain End Line Pipe. (Note: This document lists methods of field inspection of tubular goods.) (d) API RP 5C1: Recommended Practice for Care and Use of Casing and Tubing. (Note: This document covers recommended procedures for transportation, storage, handling, reconditioning, and installation of casing and tubing.) (e) API BUL 5C4: Bulletin on Round Thread Casing Joint Strength with Combined Internal Pressure and Bending. 11