Standard vs Spiral vs Integral — Build & Grade Selector

Match the heavy weight drill pipe construction and steel grade to your service.

Recommended build
Body grade (SMYS)
Sour-service basis
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.