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Standard vs Spiral vs Integral — Build & Grade Selector
Match the heavy weight drill pipe construction and steel grade to your service.
Recommended build
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Body grade (SMYS)
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Sour-service basis
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Engineering note
Request this build with a mill test certificate →
Guidance reflects API Spec 7-1 build practice and NACE MR-0175 sour-service principles. Grade and hardness must be confirmed against your H2S partial pressure and load case. Synbase issues EN 10204 3.1 / 3.2 certificates on every order.
