Data Sheet
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Data Sheet |
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DTK34P Inner-Coated Powder for Industrial Pipe
Properties and Applications
DTK-34P is a thermosetting epoxy powder coating for inner coater of pipeline. The coating has excellent corrosion
resistance, and is applicable to acid and alkaline media with wide pH range and wide temperature range, as well as
corrosive media containing high CO2 and H2S. It is widely used in drill pipe, OCTG and chemical pipeline with high
anti-corrosion requirements. The service life of the coated drill pipe is 3~5 times longer than that of the uncoated,
and the fluid medium hydraulic efficiency is improved up 10~25%.Its thickness is generally more than 150 microns,
and it is applicable to any use up to 204 ℃ (300 F). The top finish powder is used together with red phenolic
primer PC8007.
1.Technical Specifications
|
NO. |
Item |
Specifications |
Method |
|
1 |
Color |
Dark Green |
Visual |
|
2 |
Gel time（180°C） |
100-360s |
|
|
3 |
Curing time◆ |
240°C, 60~90min |
|
|
4 |
Coating thickness |
152~508um (6~20mil) |
NACE TM0185-2006 |
|
5 |
Service temperature |
≤204℃ |
|
|
6 |
Abrasion resistance |
< 55 mg ，TABER Abraser [CS-17,1kg,1000r] |
ASTM D4060 |
|
7 |
Impact resistance |
2.5J |
ISO 6272-1 |
|
8 |
Adhesion |
Pull-off test：>16 MPa X cutting method：5A |
ASTM D3359 |
|
9 |
Autoclave tests |
No blistering, cracking, swelling or softening or loss of adhesion |
|
DTK-34P coating products meet the requirements of SY/T 0544-2016 Specifications of Internal Coating of Petroleum
Drill Pipes and SY/T 6717-2016 Specifications of Internal Coating of Tubing and Casing.
2. Features
|
Recommended Service |
Benefits |
|
High temperature drilling Oil, gas and water wells Rod pump wells OCTG |
Excellent corrosion resistance Use Temperature up to 204℃ Wide pH range Excellent adhesion Excellent abrasion resistance Strong resistance to H2S and CO2 Long service life |
3.Autoclave tests
|
No. |
Test Medium |
Test Temp. |
Test Pressure |
Test Time |
|
1 |
100%N2 PH:12.8 NaOH Solution |
204℃ |
70 MPa |
48 H |
|
2 |
25%CO2,5%H2S,70%CH4 Kerosene Saturated Nacl solution |
204℃ |
50MPa |
24H |
|
3 |
100%CO2 Kerosene: Water: Toluene=1:1:1 |
150℃ |
70 MPa |
48H |
|
4 |
100%N2 PH:12.8 NaOH Solution |
150℃ |
70 MPa |
48 H |
|
5 |
25%CO2,3%H2S,72%N2 Seawater |
135℃ |
70 MPa |
48 H |
|
6 |
5%H2S,25%CO2,70%CH4 5%NaCl Solution |
130℃ |
3MPa |
750 H |
|
7 |
100%N2 3%NaCl Solution |
125℃ |
70 MPa |
48 H |
|
8 |
25%CO2,75%N2 10%H2SO4 Solution |
125℃ |
50 MPa |
48 H |
|
9 |
25%CO2,3%H2S,72%N2 5%NaCl Solution |
125℃ |
16 MPa |
48 H |
|
10 |
100%CO2 Chemical wastewater |
125℃ |
30 MPa |
48 H |
◆Typical application sequence
1) Sand blasting clean to nearly white metal with a nominal 50-75µm (2 -3mil) depth of anchor.
2) Apply phenolic primer to dry film thickness of 15-25 µm (0.6-1.0mil).
3) Preheat to 149-185°C (300-365 F) (metal temperature) to cure the primer.
4) Apply powder coating to the specified film thickness.
5) Post cure for 60~90 minutes at 230-249℃(446-480 F) (metal temperature).
6) Cool in air to room temperature.
Note:
1.Above values are the accumulative typical ones by recognized testing method, but, in order to ensure you to
select our products properly, please refer to above specification and test the samples based on your using
purpose or feel free to contact our engineers for further and better understanding.
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