API Coupling for Tubing and Casing steel pipe from China

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

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