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How seamless tubes are manufactured

Hi, I’m Ella Ma, the CEO of tytsteel.com. With more than 10 years of experience in OEM/ODM steel pipe, I’d love to share with you the valuable knowledge related to steel products from a Chinese supplier’s perspective. Hope you like this article, and please share it or subscribe to our newsletter.

Table of Contents

It is no simple matter to produce a premium Oil Country Tubular Good from a round block of high-strength steel.

  1. To manufacture Oil Country Tubular Goods, massive steel billets are heated to the forming temperature and formed into shells.
  2. These shells are then rolled over a mandrel on the push bench into a mother tube/ hollow.
  3. In the stretch reducing mill the tubes get their final customized dimension and wall thickness. At this point the tubes can be up to 150 meters long.
  4. After cooling the tubes are cut into desired random or fixed lengths.
  5. Depending on the end finish and final grade, the tube is then upset and heat-treated, which provides it with the desired mechanical properties. Next, it is furnished with a threaded connection.

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