... .Quickly make up and release, be reliable in interchangingConnection style: Thread style and Weld style.Technical criterion in design and manufacturing ... .5HP Union6021’’,2’’,3’’,4’’35500089.7,133.3,161.92,208HP Union10021’’,2’’,3’’,4’’701000088.9,131.8,161 ... .92,204.8HP Union15021 1/2’’,2’’,3’’10515000137,177.8, ...