API 5ST 2020 pdf download
API 5ST 2020 pdf download.Specification for Coiled Tubing U.S. Customary and SI Units.
1 Scope This specification covers the manufacturing, inspection, and testing of all carbon and low alloy steel coiled tubing in Grades CT70, CT80, CT90, CT100 and CT110, in the designations and wall thicknesses given in Table A.5, that can be used as work strings, completion strings, and static installations in oil and gas wells. Coiled tubing may be ordered to this specification. Coiled tubing is manufactured using the continuously milled process. This specification does not cover the joining of seamless or welded tubing segments in lengths less than 200 ft (61 m). Tubing of a higher grade is not be substituted for tubing ordered as a lower grade without purchaser approval. In the dimensional tables herein, coiled tubing is designated by outside diameter, expressed to the thousandth of an inch (0.1 mm), with OD sizes ranging from 0.750 in. (1 9.1 mm) through 3 1 / 2 in. (88.9 mm). Both U.S. Customary units and SI units are shown in this document. Annex H covers specific information about conversion factors and rounding procedures. The suitability of the coiled tubular products made to this specification for use in environments containing hydrogen sulfide (H 2 S) is outside of the scope of this document. It is the responsibility of the purchaser (and/or the user) of coiled tubing to determine the level of resistance to sour service damage mechanisms such as sulfide stress cracking necessary for the end use of the tubing. 2 References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Requirements of other standards included by reference in this specification are essential to the safety and interchangeability of the equipment produced.
3.11 flash A thin fin or web of metal formed at the joining edges of a weld when a small portion of metal is extruded during the high frequency induction seam-forming process. A flash extends above the plane of the OD surface or the plane of the ID surface. 3.12 flash-in The condition in which the internal flash from the seam welding process is left inside the tubing. 3.13 gouge Elongated grooves or cavities caused by mechanical removal of metal. 3.14 heat-affected zone HAZ The zone directly adjacent to the weld fusion zone in a longitudinal seam weld, circumferential tube-to-tube weld and skelp-end weld. The mechanical properties in the HAZ are affected by the heat produced during the welding process. 3.15 high frequency induction welding HFI A welding process used to form a longitudinal seam along the length of the milled tube. As the edges of the skelp are passed through a high-frequency induction coil, the edges of the skelp are heated through the resistance to flow of current. 3.16 imperfection A discontinuity in the product wall or on the product surface that can be detected by the nondestructive evaluation (NDE) methods. 3.17 inclusion Particles of nonmetallic impurities, usually oxides, sulfides, and silicates that are mechanically held within steel after solidification. 3.18 killed steel Steel deoxidized with certain deoxidizing elements, such as aluminum, silicon, etc. The term “killed” is used because such additions cause the steel to lie quietly in the molds during solidification. 3.19 lamination An internal metal separation creating layers generally parallel to the surface. 3.20 linear imperfection Linear irregularities, which include, but are not limited to, seams, laps, cracks, cuts, and scores.
3.35 spool The total length of “as-manufactured” coiled tubing that is placed either on the service reel or shipping reel for storage and/or transport. NOTE The tubing in a spool of tubing can contain one or more tube-to-tube welds. Can be used interchangeably with string or the capstan reel. 3.36 spooling radius ratio The ratio of the diameter of the shipping reel core to the diameter of the coiled tube. NOTE This ratio is used in determining the minimum recommended bending radius for spooling coiled tubular products onto the reel. 3.37 standardization The adjustment of nondestructive test instruments to a known reference value. 3.38 stress relief Heat treatment to a suitable temperature to reduce residual stresses, followed by cooling sufficiently slowly to minimize the development of new residual stresses. 3.39 string The finished product manufactured at a coiled tubing facility.
