Pipeline Integrity and Corrosion Protection in Thailand

The threat Holidays in factory and field-applied coatings expose steel to the soil, and the cathodic protection system cannot always reach every defect.

How we protect it DCVG and ACVG surveys locate and grade every defect indication so excavation and repair are planned by severity.

The threat Depleted anode beds, failed rectifiers, shielding and broken cables leave sections below the protection criterion without anyone knowing.

How we protect it CIPS to profile on and off potentials along the full route, rectifier and anode-bed refurbishment, and remote monitoring units at test posts.

The threat Parallel HV power lines, electrified rail and foreign CP systems induce AC on the pipe and drive stray-current corrosion at coating defects.

How we protect it PRCI-modelled AC mitigation, Dairyland solid-state decouplers, grounding mats and interference bonds.

The threat Field joint coatings applied in the trench are the weakest link in the coating system and the most common source of defect indications.

How we protect it Heat-shrink sleeves and viscoelastic systems applied by trained crews, with holiday detection before backfill.

The threat Shorted casings, road and rail crossings and submerged sections are shielded from CP and hard to survey on foot.

How we protect it Pipeline current mapping through crossings, casing isolation repair and boat-based CIPS over water crossings.

The threat Water drop-out at low points, CO2 and H2S, and bacteria corrode the pipe from the inside where external surveys cannot see.

How we protect it Corrosion coupons and ER probes at access fittings, inhibitor programmes and data trending by a corrosion technologist.