ship air pipe heads

material: Q235 hot rolled steel plate, China standard thickness of steel plate: 6-8 mm IACS P3, AIR PIPE CLOSING DEVICE IACS S27, STRENGTH REQUIREMENTS FOR FORE DECK FITTINGS AND EQUIPMENT STANDARD COATING : HOT DIP GALV. JIS, ANSI, DIN etc FLANGE Standard wire mesh : 30mesh / 5mesh Se-Won Air Vent Head consists of two chambers and float. The outer chamber is connected to the top of air pipe line by means of flange type connection, and the inner chamber has side opening through which air flows freely at normal condition, but when water is coming into the Air Vent Head, the stainless steel disk ball or float close up the opening of the outer chamber and the entered water is drained through side openings. thanks for your time.