
Pipe Coating
Cathodic Protection and Bituminous Pipe Coatings
Pipelines combine coatings with cathodic protection (CP). The coating must work well with CP. CP can cause coating…
Bituminous pipe coatings with gilsonite: enamels, primers, tapes, mastics and testing.

Pipelines combine coatings with cathodic protection (CP). The coating must work well with CP. CP can cause coating…

A primer improves bond between steel and the main coating. Gilsonite and/or bitumen dissolved in fast-evaporating solvents.

Hot-applied bitumen enamel is one of the oldest pipeline coating systems and is still used for water pipelines…

Buried steel pipelines carrying water, oil and gas must be protected from corrosion for decades. Bituminous coatings —…
| Property | Typical value | Test method |
|---|---|---|
| Appearance | Black powder | Visual |
| Softening point (R&B) | 150 – 200 °C | ASTM D36 |
| Ash content, max | 5 % | ASTM D3174 |
| Moisture, max | 1 % | ASTM D95 |
| Solubility in TCE, min | 97 % | ASTM D2042 |
| Particle size | ≤ 200 mesh | Sieve |
| Typical dosage | 5 – 25 % of compound | |
| Packing | 25 kg bags palletized; 1 MT jumbo bags. | |
Typical values. The final specification is confirmed in the COA of each shipment.
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