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 time180<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 method5A

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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