Single pull macgregor type hatch cover.pdf - Cochin University of ...

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4.2.8 Spares Rubber packing and adhesive has a limited shelf life, so check the date stamp and discard if beyond the use-by date. There should be sufficient spare parts (cleats, wedges and gaskets) to complete planned routine maintenance. Always use manufacturers’ approved spare parts. 4.3 HEAVY WEATHER PRECAUTIONS The following precautions should be taken if rough or heavy weather or when high swells are expected or when it is likely that water will be shipped on deck. 4.3.1 Prior To Rough Weather: � Check that hatch cleats are properly secured and adjusted. In rough weather, hulls are subjected to high racking forces, so it is essential that hatch covers are held in place but allowed to flex. � Check that all drain valves are operating correctly and that they are open. Drain valves are the last defence against water entering the cargo space. The drainage system will be needed during heavy weather, so it must be fully operational. � As a precaution, briefly pressurise the hydraulic system to ensure that it is fully charged and that the piping is filled with oil. This has two benefits, first, it prevents the possibility of seawater entering loose couplings or seals, and secondly, it eliminates any creep which may have occurred. 4.3.2 After Rough Weather: � Inspect all cleats, drain valves, guides and hydraulic components for damage. If hydraulic components have been damaged, do not attempt to open the covers. The emergency opening procedure should be followed until the hydraulic components have been checked and tested. � Check hatch covers for buckling or distortion. � When opening the hatch covers check for uneven movement and any unusual noises that may indicate damage. � Check all grease points and re-grease. 42
Figure 4.2 Vessel in rough weather Source: Lloyd’s Register- A Master’s Guide to Hatch Cover Maintenance 4.4 SAFETY WHEN WORKING WITH HATCH COVERS The avoidance and prevention of injuries is of paramount importance. Before working on a hatch, a risk assessment should be completed to identify all hazards. Control and safety procedures should be examined and modified so that hazards are reduced to minimal levels. The following points should be borne in mind: � If entering the hold alone, always ensure someone else knows you are there and leave a prominent notice at the hold entrance. � Check the lock-back mechanism on the hold access door or manhole is operational figure 4.3. 43
Page 1 and 2:
SINGLE PULL MACGREGOR TYPE HATCH CO
Page 3 and 4: ACKNOWLEDGEMENT First of all we hel
Page 5 and 6: TABLE OF CONTENTS v Page no. CERTIF
Page 7 and 8: 5.1.4 Hatch Covers Design. 58 5.1.5
Page 9 and 10: LIST OF FIGURES Figure no: Title Pa
Page 11 and 12: Figure7.10 Bulwark 84 Figure7.11 Bu
Page 13 and 14: CHAPTER 1 - INTRODUCTION The classi
Page 15 and 16: leakage can cause cargo damage and,
Page 17 and 18: All types of wooden hatch were made
Page 19 and 20: The first horizontal rolling built
Page 21 and 22: CHAPTER 2 - TYPES OF HATCH COVERS M
Page 23 and 24: 2.1 SINGLE PULL 2.1.1 Description F
Page 25 and 26: 2.3 FOLDING & MULTI-TYPE 2.3.1 Desc
Page 27 and 28: 2.5 PIGGY BACK 2.5.1 Description Fi
Page 29 and 30: 2.7 REEFERS HATCH COVERS Figure 2.7
Page 31 and 32: CHAPTER 3 - GENERAL REQUIREMENTS 3.
Page 33 and 34: secured by tarpaulins and battening
Page 35 and 36: force by the 1967 Merchant shipping
Page 37 and 38: 3.2.2 Cover Stowage Where a designe
Page 39 and 40: It is also necessary to provide dra
Page 41 and 42: Other steel hatch cover secured wea
Page 43 and 44: Table 3.4 Access equipment strength
Page 45 and 46: Longitudinal deformation of the top
Page 47 and 48: (vii) It should retain all the abov
Page 49 and 50: easier to handle without power assi
Page 51 and 52: � Keep wheels, cleats, hinge pins
Page 53: 4.2.2 Drive Chains; Check their Len
Page 57 and 58: Figure 4.5 Never smoke in a hold. S
Page 59 and 60: Figure 4.9 Always wear protective h
Page 61 and 62: e taken when opening hatch covers e
Page 63 and 64: Remember to carry out a chalk test
Page 65 and 66: 4.6.13 Painting Corrosion occurs ma
Page 67 and 68: 11. Coaming. 12. Sheave. 13. Cross
Page 69 and 70: Breadth: 44.5cm 5.1.3 Hatch Coaming
Page 71 and 72: Slope: 1cm Total number of panels:
Page 73 and 74: Height of jack while normal conditi
Page 75 and 76: Pulley for rope Diameter: 2cm Width
Page 77 and 78: Height from the deck: 7.2cm Height
Page 79 and 80: CHAPTER 6 - FABRICATION The design
Page 81 and 82: 6.3 HATCH COAMING FABRICATION Broug
Page 83 and 84: Using wood cutter length of 320 cm
Page 85 and 86: Plastic wheels (16 pieces), metalli
Page 87 and 88: At the top of the iron plate, rail
Page 89 and 90: Figure 6.12: Crane space Source: Te
Page 91 and 92: CHAPTER 7-ASSEMBLY OF FABRICATED PA
Page 93 and 94: Source: Team 7.3 ASSEMBLY OF SIDE D
Page 95 and 96: 7.6 ASSEMBLY OF HATCH COVER All the
Page 97 and 98: The whole bulwark is placed over th
Page 99 and 100: Through the middle top eye bolt rop
Page 101 and 102: The test involves placing (with hat
Page 103 and 104: CHAPTER 9 - CONCLUSION Right from t
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