Why are RPT threads less subject to handling and makeup damage?
For all thread forms, the pin crest is the thread element most often damaged, and many pin crests get dinged by bumping, by dragging, by cross-threading and such, but when RPT threads are made-up tight, there is always a gap between the pin crest and the box root that prevents crest galling and false makeup, as can happen for instance, with the API Buttress thread form. Also, TopTorq threads have the added features of wide crests between relatively large radii that minimizes tendency to such damage.
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- Why are RPT threads less subject to handling and makeup damage?