Are such tags available for purchase?
By “OTCG,” I presume you mean oil pipes (I looked up the acronym and found that it stands for “oil country tubular goods,” a term I had not heard before). There are a variety of tags available for use on oil pipes.
InfoChip makes a high-frequency (HF) tag that can be inserted into a small, shallow hole drilled into pipe.
William Frick & Co. offers passive ultrahigh-frequency (UHF) tags in rubber rings that can be fitted around drill pipes, as well as other form factors that might work.
—Mark Roberti, Founder and Editor, RFID Journal
How Can We Avoid Reading Adjacent Vehicle Tags at Toll Booths? »