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Highlighted Companies

Octg Api 5ct Casing Coupling Stc Ltc Btc K55 J55 N80 P110 - China

price: contact company for price

The couplings produced by our company are good at stable quality which the technical parameters are completely complied with the requirements of API5CT and API5B latest standards.

Meanwhile, the company has equipped with more than 30 sets CNC threading machines, is able to produce variety of steel grade couplings include STC, LTC, BTC and NU, EU threading couplings.

The size for Tubing couplings are ranged from 2-3/8'' to 4-1/2'', as well as 4-1/2'' to 20'' for Casing Couplings.

The company can produce all kinds of couplings over 1 million pieces annually.


Company Contact:


  • Phone: +862260108906

  • Address: No.2605 Ocean International Center, Tianjin , Tianjin , China

  • Email: Email


Published date: January 16, 2020

  • Business Description: TIANJIN RICHSEN TECHNOLOGY CO.,LTD own modern factory covering a total area of 1000m2, have two Medium Frequency heat treatment production line, with 30 CNC threading machines.

    We equipped with perfect NDT equipement, full specification of thread measuring instruments pipes to ensure that our products comply with the API Standard.

    At the same time, the company also invested a seamless pipe factory, in order to supply pipes for our production.

    The company has passed ISO 9001 and API - 5 CT certification, Annual capacity is one million pieces of couplings.

    We can also machine various types of Non- API (Premium connection) product.

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