Pipeline liner material wears well in tests of field specimens

Tests on two field-aged specimens of polyamide-11 (PA-11) pipeline liners in carbon steel crude oil and gas production pipelines indicate the material protects against internal corrosion when chemical inhibition programs, conventional liner materials, or specialty corrosion-resistant alloys are either infeasible or uneconomical.1 New (left) and used PA-11 liners from the first liner case show differences after 3 years' use in sour service. The color difference in the used liner resulted mainly from surface absorbed crude components (Fig. 1).Click here to enlarge imageTwo field-aged specimens were supplied for this analysis by oil field operators. The liners appeared in excellent cond...

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