Rust prevention and internal coating of electric dehydrator for offshore drilling platform

Rust prevention and corrosion control 
 

"Ceramic-Polymer SF / LF-ARAMCO-APCS-2i, 28, 117" was applied for a internal -protection for electric  dehydrator for offshore drilling platform Lufeng 7-2 / South China Sea

Project: internal protection for electric dehydrator for offshore drilling platform

· Owner: Newfield China LDC

· Technical Engineering and construction platform: CSE Shenzhen, Shekou Shenzen / China

· Application protection: Yue Yang Shenzhen Company, Shenzhen / China

· Applied Product: "Ceramic-Polymer SF / LF-ARAMCO-APCS-2i, 28, 117"

· Completion date: April 2014

 

 

                                             

 

For newly constructed offshore drilling platform Lufeng 7-2, premium product was applied across the entire surface of an electric dehydrator.

More technical information:

- Medium: oil, water

- Design pressure: 0.75 Mpa

- Test pressure: 0.94 Mpa

- Design temperature: 140 ° C

- Surface: 232 m2

Premium product Ceramic-Polymer SF / LF-ARAMCO-APCS-2i, 28, 117 has been tested repeatedly by researchers in the laboratory "Saudi Aramco" and received approval application in accordance with standard specifications APCS-2i, APCS-28 and APCS-117 (Standards in Engineering 2010, SAES-H-001; selection and application protection, and industrial plants and equipment requirements). Specific aspects for obtaining approval have been represented by an excellent chemical resistance, operating  temperature held at 150 ° C and extreme pressure.

 

 

Surface preparation for rust prevention

 

 

To remove all contamination, the tank has been cleaned  under the pressure water jet, subsequently being blasted in accordance with SSPC-SP10 standard.

The surface was inspected; It shows a level of roughness of 50-100 μm. Tests were performed to determine the concentration of salts s (Bresle method). They meet all requirements.

Ceramic-Polymer SF/LF-ARAMCO-APCS-2i,28,117 was applied by airless spraying in 2 layers of 400 µm each to achieve the required thickness of 800 µm. After full curing the total coating thickness was accurately measured and the surface was inspected with an electronic spark detector (Holiday tester, high voltage 5 kV). No pinholes were detected, the coating material showed a smooth surface. Thereafter, weld joints and supporting points of the holders inside the tank were additionally coated by brush.

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