Bottom Powder Coated Tubing

 

  • Sanjack owns two pipeline upsetting production lines with a total upsetting capacity of 20,000 tons per year.
  • Sanjack has 8 high-precision and fully automated tubing and coupling thread production lines.
  • Sanack has 4 production lines for powder spraying and liquid spraying, which can produce a variety of internal spraying tubing.

Using liquid or solid epoxy macromolecule polymer with multipolar group as the bottom layer greatly increases the bonding force of the coating to the substrate. Meanwhile, using solid epoxy macromolecule polymer with heat, acid and alkali resistance as the surface layer, a composite coating structure of “bottom liquid-surface powder” or “bottom powder-surface powder” is formed, which creatively solves the problem of poor adhesion of high glass transition temperature polymer coating to steel substrate, thereby improving the resistance of polymer coating to H2S, CO2, CL – under high temperature and high pressure, while at the surface layer Super-abrasive materials and anti-wax and scale-resisting materials are added to the material to greatly improve the wear resistance and anti-wax and scale inhibition properties of the coating.

Technical Parameter
The technology meets the above table and also meets the following autoclave and corrosion resistance test.
1 Autoclave(Type test) Liquid phase:NaOH aqueous solution(pH=12.5);Temperature:148℃;Pressure:70MPa; Test time:168hrs
Result: no foaming, no cracking and no less than 2 grades of adhesion. NACE TM 0185
ASTM D714
BS EN10289: Attachment D
2 Acid Resistance(Type test) Liquid phase:10%HCl+3%HF; Temperature:50℃
Pressure:atmospheric pressure; Time:168hrs
Result: no foaming, no cracking and no less than 2 grades of adhesion. ISO 2812-1
ASTM D714
BS EN10289: Attachment D
Product Application
It is suitable for long-term use in water injection wells, oil production wells, oil pipelines and so on under the condition of pH 3-13 and temperature not higher than 120 ℃.

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