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Iraq MIssan Oil Field Development Phase II

2019-06-26

Trunk Line Phase II Steel Pipes For
Iraq Missan Oil Field Development Project


Customer: CNOOC Iraq Limited
Description: Internal Solvent-free Epoxy –Phenolic Coating and 3LPP External Coating Application


THE BACKGROUND

CNOOC Iraq Limited, acting as lead contractor of the Technical Service Contract for Missan Oil Fields entered into by and between Missan Oil Company.

Missan Oil Field is located in the SE of Iraq, close to the border with Iran, some 175 kilometers N-NW of the city of Basrah, and 350km SE of Bagdad – the capital of Iraq. Missan Oil Field includes three producing fields such as Abu Ghirab, Buzurgan and Fauqi. Abu Ghirab and Fauqi fields straddle the border with Iran. Missan Oil Field was built in 1976, and suffered from Iran-Iraq War and Iraq War. Many facilities are needed to be maintenanced and upgraded.

The diameter of the line pipes for this project is from 16 inch to 18 inch and the total quantity of pipes is 85 km. Aassociated gas and oil mixture from the degassing station is transported separately via trunk lines to junctions and subsequently sent to the BUT field.

Application field/Corrosion Dimensions/Length/Quantity Pipe Manufacture
Oil-gas, Transport pipes Φ457mm*8.7mm
Φ406mm*8.7mm
Total: 85KM
CNOOC Kingland
Pipeline Co., LTD


SOLUTION

In order to provide a suitable internal coating protection with strong adhesion working for more than 20 years transporting crude oil with sour gas, water, chloride etc, the pipeline operation maximum temperature is 110-125℃. Tyhoo has proposed to CNOOC IRAQ to apply internal Solvent-free Epoxy-Phenolic Coating SigmaLine2000/PPG with external 3LPP coating as a suitable solution.

PART COATING STRUCTION TOTAL COATING THICKNESS
INTERNAL Solvent-free Epoxy –Phenolic Coating
SigmaLine2000/ PPG
500-1000μm
EXTERNAL 3LPP MIN. 2.2MM


TECHNICAL REQUIRMENTS FOR INTERNAL COATING

SIGMAINE2000 is a two-component, solvent-free, amine-cured phenolic epoxy coating, developed for high-end anticorrosive performance and high chemical, high temperature resistance, widely used as internal lining for oil transportation. The main properties as following:

NO. Property Value
1 Adhesion(23±3℃) ≥20 MPa
2 Abrasion resistance ≥3 L/μm
3 Water immersion (100℃, 120d) Coating intact
4 Autoclave
Test medium: 3%Nacl water solution + oil (toluene + kerosene 1:1)
Test temperature and pressure:125℃/6Mpa
And pull-off
adhesive is no less than 8Mpa
5 Cathodic disbonding
Experiment condition: 65℃,30d
AVG stripping
length 5.63mm