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API Tubing

Dimension range (OD inch): 1-1/2”----4 1/2” Dimension range (OD mm): 26.67----114.3 Type of upset: NUE, EUE, Plain end. Standard: API SPEC 5CT Main Steel Grade: H40, J55, N80, N80Q, L80, L80-1, L80-9Cr, L80-13Cr, P110 etc. Type of Tubing: Non-upset tubing (NU), External-upset tubing (EUE), Integrated Joint (IJ).



Product Details


Tubing is a relatively small-diameter pipe that is run into a well to serve as a conduit for the passage of oil and gas to the field surface facilities for processing. Tubing must be adequately strong to resist loads and deformations associated with production and workovers. Further, tubing must be sized to support the expected rates of production of oil and gas.

Sizes and Materials

Tubing pipes are manufactured in seamless and welded execution, in the size range of 1.050 to 5 1/2 inches (consult this article to see the AP5CT tubing pipes sizes) and in the following material grades: H-40, J-55, K-55, N-80, L-80, C-90, T-95, P-110, Q-125

End Connections

The main types of connections for tubing pipes are NUE (non-upset), EUE (external upset) and premium. Corrosion resistance under sour service conditions is a very important OCTG characteristic, especially for casing and tubing.

More casing pipes and their colors


Oil Tubing

Range 1

Range 2

Range 3





Label D Outside diameter mm Wall thickness mm C type of end-finish
1 2
NU T&C EU T&C IJ H40 J55 L80 N80 C90 T95 P110
1.9 2.75 2.9 4 48.26 3.68 PNUI PNUI PNUI PNUI PNUI PNUI  
3.65 3.73