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API 5CT Grade-to-Service Matcher
Map your well environment to candidate API 5CT coupling grades — and see which grades are ruled out. Guidance only; final grade selection is the operator’s responsibility per NACE MR0175 / ISO 15156-2.
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Sour-service grades (L80-1, C90, T95, C110) require SSC testing per NACE TM0177 and qualification to NACE MR0175 / ISO 15156-2. A higher-grade coupling is paired with lower-grade buttress casing (e.g. J55/K55 → L80 Type 1) to keep joint strength uniform.
