API 5CT steel casing couplings are short pieces of casing or tubing used as a kind of connection between the individual joints. They are normally made of the same grade of steel as the casing or tubing.

Many customers require the color coating on the couplings before shipment. In this way, they can easily differ the pipes after the discharge in the port.
There are different steel grades for couplings, which are identified by various colors like:
J55 / K55-Bright Green
P110-White
N80 / L80-Red

For the same colored couplings, we can tell the steel grade according to the color of the belt.

Descriptions:

1 Standard: API 5CT/ 5B

2 Steel Grade: H40,J55,K55,N80-1,N80Q,L80,P110

3 Tubing Coupling:

OD: 2-3/8’’, 2-7/8’’, 3-1/2’’, 4’’, 4-1/2’’

Threads: NUE--Non Upset

EUE---External Upset

4 Casing Coupling:

OD: 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’’

Threads: STC, LTC, BTC

Who We Are 

Cangzhou High Booming Pipe Equipment Co.Ltd is a leading manufacturer & exporter of steel pipe & pipe fittings in China. Located in Cangzhou, a well-known “steel city” and near to Tianjin, we can make the delivery and container loading much faster and more convenient

High Booming has started its business from OCTG pipes, seamless pipes and expanded to ERW pipes, SSAW pipes, hollow sections and pipe fittings in order to provide one-stop resources integrating services for the clients and help them finish the projects effectively. Our production base is centered in Hebei and Tianjin. And all the factories are API/ISO/CE/FPC certified with highly equipped production lines and sophisticated technical engineers. Meanwhile, given the friendly& trustworthy relationship, we can also suppy the first-hand resources from the large famous mills like TPCO, Baotou Group, Bao Steel, Anhui Tianda, Linzhou Fengbao etc.

Our main product specification:

1. OCTG PIPE: Casing, Tubing, Coupling, Pup Joint, OD 60.3-508mm

2. SMLS PIPE: OD 21.3-914mm

3. ERW steel pipe, LSAW pile pipe, Spiral steel pipe

4. HOLLOW SECTION: OD: 20*20-600*600mm

The steel pipe and fittings are manufactured according to international standards such as GB, ASTM, API, DIN, JIS, EN etc. Custom-made steel product is also acceptable as per customer’s requirements. Engaged in steel industry for 15+ years, High Booming has successfully supported in many kinds of projects, such as oil & gas, well drilling, pipeline transmission, machinery, construction, marine & offshore etc. And our steel products have enjoyed a very good reputation in many countries and regions.

Welcome to visit us !

We look forward to establishing a long-term cooperative relationship with you!