API 5ST Low Carbon Alloy Steel Coiled Tubing CT110 Flexible Tubing
Coiled tubing, made of low carbon alloy steel, has good flexibility. So it is also known as flexible tubing. A roll of coiled tubing can reach thousands of meters long. It will be wounded on a spool and straightened before pushed into a wellbore. And then it will be rewounded to coil the pipe back onto the trasport and storage spool.
Tiptop provides coiled tubing that meet the highest industry standards. It can replace the conventional tubing for many operations. Our coiled tubing is used in applications such as milling, drilling, rock fracturing, sidetracking, production tubing, low bottomhole pressure drilling, wellbore cleanout, nitrogen kickoff, sand control, cementing, mechanical isolation, tube logging & perforating.
We can supply steel grades of CT70, CT80, CT90, CT100, CT110.
| Grade |
Max C |
Max Mn |
Max P |
Max S |
Max Si |
| CT70 |
0.16 |
1.2 |
0.025 |
0.005 |
0.5 |
| CT80 |
0.16 |
1.2 |
0.02 |
0.005 |
0.5 |
| CT90 |
0.16 |
1.2 |
0.02 |
0.005 |
0.5 |
| CT100 |
0.16 |
1.65 |
0.025 |
0.005 |
0.5 |
| CT110 |
0.16 |
1.65 |
0.025 |
0.005 |
0.5 |
Mechanical properties of carbon steel and low alloy steel coiled tubing
| Grade |
Min. Yield strength |
Max. Yield strength |
Min. Tensile strength |
Max. hardness HRC |
| psi |
Mpa |
psi |
MPA |
psi |
Mpa |
tube body &weld seam |
| CT70 |
70,000 |
(483) |
80,000 |
552 |
80,000 |
552 |
22 |
| CT80 |
80,000 |
(552) |
90,000 |
620 |
88,000 |
607 |
22 |
| CT90 |
90,000 |
(620) |
100,000 |
689 |
97,000 |
669 |
22 |
| CT100 |
100,000 |
(689) |
|
|
108,000 |
758 |
28 |
| CT110 |
110,000 |
(758) |
|
|
115,000 |
793 |
30 |
