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       DPC156 Inner-Coated Powder for Industrial Pipe

Properties and Applications  

DPC-156 is a thermosetting epoxy powder coating for inner coater of pipeline. It meets with PC8007 red primer to

make high-quality coating. 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 150

(302  F).

1.Technical Specifications

NO.

Item

Specifications

Method

1

Color

Yellow-grey

Visual

2

Gel time180<C

80-180s

 

3

Curing time

240<C, 60~90min

 

4

Coating thickness

152~508um (6~20mil)

NACE TM0185-2006

5

Service temperature

150≧(302F)

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DPC-156 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

OCTG150C

 Chemical or sewage pipeline and  

 special valve

 Oil gas / sewage / mining pipeline

 Content <1%H2S pipeline

 Acid transmission pipeline and fittings

Excellent corrosion resistance

Use Temperature up to 150C

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

150

70 MPa

48 H

2

25%CO2,5%H2S,70%CH4

Kerosene

Saturated Nacl solution

150

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 (300-365F) (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<C(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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