What types of flanges are there?
How many types of flanges are there? How are they classified? What are the manifestations of flanges? Types of flanges1. According to the classification of national standard flanges: integral flanges, threaded flanges, butt welding flanges, flat welding flanges with necks, socket welding flanges with necks, butt welding ring loose flanges with necks, plate flat flanges Welding flanges, butt-weld...