TIANJIN RICHSEN TECHNOLOGY CO.,LTD

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. We also supply permium thread products by customer's request
1.Grade: J55, K55, N80-1, N80-Q, L80, C90, P110
2.We also supply permium thread products by customer's request
3.Size: tubing coupling from 1.9" to 4-1/2", Casing coupling from 4-1/2"to 13-3/8"
4.Type: NU, EU (tubing coupling), STC, LC, BTC (casing coupling).
5.Surface treatment: Whole phosphating, or inside phosphating and outside coating
6.Packing: By carton, wooden case, wooden pallet, or by requirements of customers
Otherwise, our company manufactures and sells casing and tubing, threader protector etc. We always do business based on the principle of equality and mutual benefit, we provide the high quality and competitive price products