special flangeHigh-quality product and service, competitive price will provide you with the remarkable profits, 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, plate flanges 2. Material: carbon steel, stainless steel and alloy steel flange 3. Standard: ANSI, JIS, BS, ...