Procedure for evaluating the friction characteristics of a shouldered threaded connection

摘要

Procedure for evaluating the parameter of actual Ka total friction of a shouldered threaded connection which includes: a) making up the connection applying a general make-up torque and observing the corresponding torque/turn diagram; b) subsequently breaking out the connection observing the corresponding torque/turn diagram; c) calculating the actual Ka of the connection with an appropriate equation. $$ $$