... , welcome the frie special flange 1. Type: welding neck flange, slip on flange, lap joint flange, thread flange, socket weld flange, blind flange, 8-blind flanges, orifice ... flanges 2. Material: carbon steel, stainless steel and alloy steel flange 3. Standard: ANSI, JIS, BS, DIN, UNI, EN, GB, AWWA ...