https://mechpiping.en.made-in-china.com/product-group/xbAaojpHgiYd/Hubbed-slip-on-flanges-1.html
Hubbed slip-on flanges - Jinan Mech Piping Technology Co., Ltd - page 1.
China Hubbed slip-on flanges catalog of Hubbed Slip on Welding Steel Pipe Flange (SO Flange) , Carbon Steel, Class 150/Pn16, Durable Slip on Flange for General...
slip on flanges