JQP, hello
Not to sound arrogant, but that's the first time I've seen those terms in 22 years in the industry.
I think what they meant to say is:
Line pipe: which is plain-ended, lower grade (lower yield strength) pipes, typically manufactured by forming a continuous strip into a tube and welding the seam (a la "ERW" pipe. Used for fabrication work, pipelines, etc.
OCTG: Oil Country Tubular Goods, pertaining to both ERW and tubeless manufacturing processes, these are pipes which are threaded to screw together, usually in Range 3 lengths (+/- 42') in various sizes, weights, and grades (yield strengths), but which typically far exceed the yield strengths of common line pipe.
Hope this helps. If nothing else I would question a supposed manufacturer who is unfamiliar with these terms.
Regards to all and Congrats to Big Dog. Lets keep this thread at the sharp end of the drill bit and check egos at the door.
Good Luck,
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