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API SPEC 5CT (METRIC) Document Information:
Title
Specification for Casing and Tubing (Metric Units)
American Petroleum Institute
Publication Date:
Jan 1, 1995
Scope:
1 Scope
1.1 This specification covers steel casing, tubing, and liners in the
designations and wall thicknesses applicable to the following four
groups and shown in Tables A-1, A-2, and A-3 of Appendix A. This
specification also covers pup joints, connectors, couplings, and
thread protection. Supplementary requirements are specified in
Appendix B.
a. Group 1--All casing and tubing in Grades H, J, K, and N listed in
Tables A-1, A-2, and A-3.
b. Group 2--All restricted yield strength casing and tubing grades C,
L, and T listed in Tables A-1 and A-3 and other outside diameters
and/or wall thicknesses of Grades C90 and T95 as agreed upon between
the purchaser and the manufacturer.
c. Group 3--All high strength casing and tubing in seamless Grade P
listed in Tables A-1 and A-3 and all sizes 5½ and larger
electric welded (EW) Grade P listed in Table A-1.
d. Group 4--All special service casing in Grade Q that is listed in
Table A-1 or other outside diameters and/or wall thicknesses as
specified on the purchase order.
All requirements given herein for casing and tubing shall apply to pup
joints and connectors, except as otherwise specified.
In developing an order for products made to this specification, the
user should refer to Section 4 to properly define specific
requirements.
1.2 Dimensional requirements on threads and thread gauges,
stipulations on gauging practice, gauge specifications, and
certification, as well as instruments and methods for inspection of
threads are given in API Standard 5B and are applicable to products
covered by this specification.
1.3 In the dimensional tables herein, pipe is designated by outside
diameter size. The outside diameter size of external-upset pipe is the
outside diameter of the body of the pipe, not the upset portion.
1.4 The U.S. customary equivalent units of the metric values in this
specification are provided in API Specification 5CT, Specification for
Casing and Tubing (U.S. Customary Units). The procedures which were
used to make the conversions are shown in Appendix M.
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