Coupling

• Transport Package: Wooden Box
• Specification: 500*500*500
• Trademark: Lake Petro
• Origin: China
• Model NO.: All kind
• HS Code: 84314310
• Production Capacity: 5000pieces/Year

Product Description

Product Description

Couplings are short lengths of pipe used to connect 2 joints of tubing or casing.

They come with painted colour codes on their external surface to indicate their grades.

Couplings are manufactured according to API 5CT and 5B specifications.

Coupling manufactured  from 1-1/3" to 30" according to API standard. It is treated with phosphating or copper plating and have good abrasion& corrosion resistance. Threads have strong viscous resistance. Also customized couplings can be supplied according to special requirement, such as special-clearance coupling, combination coupling, reducing coupling, seal-ring coupling, special-bevel tubing coupling, ect.

API Tubing Coupling:

Specification
Size (Pipe OD) (in)	1.900, 2-3/8, 2-7/8, 3-1/2, 4, 4-1/2
Upset	Non Upset External Upset
Grade	J-55, C-75, L-80, N-80, C-95, P-110
Option	Electro-zinc plated Phosphorised

API Casing Coupling:

Specification
Size (Pipe OD) (in)	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
Threading	Short Round-Thread Casing (STC) Long Round-Thread Casing (LC) Buttress Thread Casing (BC)
Grade	H-40, J-55, K-55, C-75, L-80, N-80, C-95, AS-95, P-110, L80-13CR