Ship hatch cover JIS F 2304 C

JIS F 2304 Type C is sunk manhole hatch cover. It is oval shape with multi bolts. Main material is mild steel, bolt and nut has alternative choice for stainless steel, bronze, brass. Our manhole ring is cut as whole piece without butt weld several pieces together. This workmanship makes sure the ring has smooth top surface to keep good watertight and oiltight. It is used on water ballast tank and oil tank with different kinds of gasket material. The sunk manhole cover makes sure the deck or the tank has no obstacles and avoid the damage of the manhole stud during cargo discharging. Main Technical Specification: Standard: JIS F 2304-1989 Type: C, sunk multi bolt cover; Material: Stainless Steel, Mild Steel, Weight: 56.3 to 79.1kg; Test: Hydraulic Pressure Test, Dimension: As Standard or Customized as inquiry; Application Type: Oil Tight, Water-tight, Gas Tight, Gasket Type: Buna A, Neoprene, Customized; Bolt Material: Stainless Steel, Bronze, Brass; Surface Treatment: Sandblasting to S2.5 + one layer of epoxy shop primer, Polished, Galvanized, Customized surface treatment available. Classification Certificates: CCS, NK, BV, ABS, DNV, LR, KR, IRS, RS, RINA. Mill Certificate.