Coating comparison (high level)
Use this table for early-stage optioneering only. Final selection belongs to the project corrosion engineer and governing standards.
| Topic | 3LPE / 3LPP | FBE | Coal tar / CTE |
|---|---|---|---|
| Primary barrier | Thick polyolefin topcoat + adhesive + epoxy primer | Thin, dense thermoset epoxy | Bituminous / epoxy-bitumen buildups per legacy specs |
| Typical sweet spot | Buried pipelines needing robust mechanical protection | Internal/external corrosion control where epoxy is acceptable | Older specifications; check HSE restrictions |
| Key risk to manage | Peel adhesion at elevated temps (PP vs PE choice) | Handling damage; field repair compatibility | Environmental acceptance; worker exposure controls |
Footnote: soil chemistry, CP design, operating temperature, and abrasion are decisive - this table is non-exhaustive.