... , 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 ... , stainless steel and alloy steel flange 3. Standard: ANSI, JIS, BS, DIN, UNI, EN, GB, AWWA, API, MSS, 4. Size: 15 mm ...