Zhongyuan Ship Machinery Manufacture (Group) Co., Ltd
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JIS F 2304 Type B Flush Multi Bolt Oval Manhole
Description:
JIS F 2304 Type B is flush 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.
Main Technical Specification:
Main Technical Parameter:
| Nominal Name | Opening | Gasket | Cover | Bolt Quantity | Reference | |||||
| L | B | L1 | B1 | L2 | B2 | L3 | B3 | Weight (kg) | ||
| 4 535 | 450 | 350 | 480 | 380 | 550 | 450 | 620 | 520 | 20 | 42.8 |
| 5 040 | 500 | 400 | 530 | 430 | 600 | 500 | 670 | 570 | 22 | 49.1 |
| 6 040 | 600 | 400 | 630 | 430 | 700 | 500 | 770 | 570 | 24 | 56.6 |
| 6 045 | 600 | 450 | 630 | 480 | 700 | 550 | 770 | 620 | 24 | 59.6 |
Drawing of JIS F 2304 Type B Flush Multi Bolt Oval Manhole Marine Outfitting