China API L80 Pipe Coupling Manufacturer PipesTec Offers API L80 Coupling with parkerising and red painting surface treatment, 3.5 Inch, 9.2LB/FT.
China Galvanized Full Coupling Manufacturer PipesTec Offers ASTM A105 Galvanized Full Coupling, PN400 (3000 LB), DN80 (3 Inch), Threaded Ends, ASME B16.11.