ASME B16.11 Coupling | SW & Threaded
The coupling may be furnished with two internally threaded (THD) ends, two socket welding (SW) ends, or a combination of SW and threaded ends. ASME B16.11 SW couplings are available in pressure rating Class 3000, 6000, and 9000; ASME B16.11 threaded couplings are available in pressure rating Class 3000 and 6000.