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API 5CT Steel Casing & Tubing Grade and Specification

Author : admin

Update time : 2025-10-23 08:54:15

Shengtian Group offers a full range of API 5CT Steel Casing and Tubing to meet the various needs of oil exploration and production. Below is a tubing and casing pipe chart, please read on to learn more.

　　Common Grades:

　　• J55/K55

　　• N80/N80Q/L80

　　• C90

　　• R95/T95

　　• P110/C110

　　• Q125

　　Connections:

　　API 5CT is suitable for the following connections that comply with API SPEC 5B:

　　• SC: Short Round Thread Casing

　　• LC: Long Round Thread Casing

　　• BC: Buttress Thread Casing

　　• NU: Non-upset Tubing

　　• EU: External Upset Tubing

　　• IJ: Integral Tubing Connection

　　4 Groups of Grade:

　　• Group 1: All casing and tubing in Grades H, J, K, N, and R

　　• Group 2: All casing and tubing in Grades C, L, M, and T

　　• Group 3: All casing and tubing in Grade P

　　• Group 4: All casing in Grade Q

　　OCTG Tubing Dimensions and Weight Chart:

　　OCTG Steel Casing Pipe Dimensions and Weight Chart:

　　API 5CT is the standard technical specification for Steel Casing and Tubing for oil wells in the petroleum and natural gas industry. In addition to casing and tubing, it includes pup joints, coupling stock, coupling materials, and accessory materials, and establishes requirements for three product specification levels (PSL-1, PSL-2, and PSL-3).

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Next : ASME B36.10 / B36.19 Steel Pipe Dimensions & Sizes Chart

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