Henan Dongfanglong Machine Manufacture Co.,LTD was founded in 1999 and located at intersection of 106 National Highway and JIntian road,Puyang,Henan,Chian.We have over 15 years experience of producing,

developing and selling oil pipes and their accessories,steel pipe fittings and other down well tools.We can supply the related certifications for you as follow:

• ISO 9001 Quality control certificate
• API-5CT Certificate with the NO.5CT-0837
• API-7  Certificate with the No.7-0872
• API -5DP Certificate with the No.5DP-0135

The company has a fixed assets of over 570 million RMB,and is staffed with over 200 employees,almost hundred sets of accurate CNC lathes,auxiliary equipments and developed other machines and testing 

equipments.Our own trademark has been registered and approved since february 2010.

API 5CT 5B  2 7/8" nu K55 oil tubing nipples

1.Std:API 5CT 5B

2.Size:tubing nipples 2 3/8" 2 7/8" 3 1/2" 4 1/2"

          casing nipples  4 1/2" 5" 5 1/2" 6 5/8" 7" 7 5/8" 8 5/8" 9 5/8" 10 3/4" 11 3/4“ 13 3/8” 16“ 18 5/8” 20“

3.Screw thread:Tubing nipples : NU (non-upset thread) EU(external upset thread) Casing nipples: STC (short                                 round thread)  LTC (long round thread) BTC(buttress thread)

4.Grade:J55 K55 N80 L80 P110

5.Length:2FT 3ft 4ft 6ft 8ft 9ft 10ft 12ft