API 5DP E75,X95,G105,S135 Drill Pipe, Used Drill Pipe ...
Friction welding drill pipe is according with API Spec 5DP specification.The steel grades are E75, X95, G105 and S135 that are after partly or overall heat treatment. The adapter part adopts thermal refining to superior alloy steel 4137H that's after thread hardening treatment and phosphating to better antiseize.
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