zxc ® 02-Окт-2014 12:50

Hatch Cover Maintenance and Operation


Year: 2010
Language: english
Author: David Byrne
Publisher: North of England PI & Associations
Format: PDF
Quality: Scanned pages
Number of pages: 61
Description: The first edition of this loss-prevention guide, published in 1997, has been widely distributed in the marine industry with the objective of helping to control the substantial level of claims associated with hatch covers. The guide continues to be found useful and so a second edition has been produced. This new edition brings the guide up to date with the addition of some new material; the opportunity has also been taken to revise the presentation.
I'he objective of the guide remains as before: to provide information in a simple and straightforward way to those onboard ship and those ashore who have an interest in the voyage. The aim is to provide practical guidance to the target audience of ship’s officers, ship operator’s technical staff, surveyors, lawyers and claims handlers.
The guide deals with hatch cover design principles, operation, maintenance and safety.
Appendices are included which provide checklists for routine onboard inspections, notes on recent IAGS contributions to hatch cover design and operation, and a glossary of terms.

CONTENTS

CONTENTS
Chapter Page
FOREWORD 3
1. BENEFITS OF KEEPING GOOD HATCH COVERS 4
2. HATCH COVER DESIGN PRINCIPLES 5
2.1 Types of hatch cover 5
2.2 Basic design features 15
2.3 Recent changes to hatch cover design rules 19
2.4 Importance of steel-to-sceel geometry 20
2.5 Sealing arrangements 21
2.6 Drainage 24
2.7 Securing 26
2.8 Locators 26
2.9 Problems from new 27
3. OPERATION 30
3.1 Safety 30
3.2 Closing and opening 31
3.3 Securing 32
3.4 Common problems 32
3.5 Inspection by onboard staff 34
3.6 Surveys 34
3.7 Testing methods 36
3.8 Use of hatch cover sealing tape and other temporary sealants 38
3.9 Checklists and reporting 40
3.10 Other watertight closures 40
4. MAINTENANCE
4.1 Routine upkeep and maintenance in service
4.2 The importance of cleats and seals
4.3 Corrosion
4.4 Keeping the drainage operational
4.5 Operating gear
4.6 Spares
4.7 Temporary repairs
4.8 Permanent repairs
5. 1MP1 d CATIONS OF POOR HATCII COVER CONDITION
5.1 Seaworthiness and cargoworthiness
5.2 Records and evidence
5.3 Use of sealing tape and other sealants
APPENDICES
I I latch cover survey checklists for weathertightness
II Note on LACS Z17 (1997) procedural requirements for service suppliers
III Glossary' of terms INDEX

INDEX

INDEX
battening device..............................................................................27
(largo damage .................................................................................5
Cargoworthiness ..............................................................................48
(Ihalk test ..................................................................................26
Checklists ..................................................................................40, .SI
Classification for hatch covers................................................................6
Cleats...............................................................................12,26,33,42
Closing and opening...........................................................................31
Coiling covers ................................................................................6
Common problems ..............................................................................32
C'orrosion.........................................................................2S, 28, 34,43
(lompression bar......................................................................16, 21, 25
Cross-joint seal ..................................................................21, 25,33, 39
Defects ...................................................................................32,35
Design.............................................................................5, 15. 17, 19
Double-lip seal ...........................................................................22.23
Drainage ............................................................................24,25,31,44
Evidence .....................................................................................49
Folding covers..............................................................................7,35
Gantry crane operation .......................................................................12
Gasket........................................................................................21
I lague-Visby Rules ..........................................................................48
I ligh-expansion foam ........................................................................39
I lose test..................................................................................36, 37
I Iollow section seal........................................................................22, 23
I Ivdraulic folding covers ...........................................................7, 8, 9, 10
I Ivdraulic pipework..........................................................................28
1ACS requirements............................................................................19. 54
Inflatable seal ..............................................................................23
Inspection .................................................................................. 34
International Convention on Load Lines 1966 ..................................................18
1 „i ft-away covers ..........................................................................15
Locators.....................................................................................26. 27
Ding-chain operation .........................................................................II
Maintenance...................................................................................41
Multi-stacking covers ........................................................................14
Non-return drain valve .......................................................................25
Operating gear................................................................................6. 44
Operation ....................................................................................30
59
Index
Hatch Cover Maintenance and Operation
lacking ...................................................................................21
Peripheral seal............................................................................21
Permanent repairs..........................................................................46
Permanent set..........................................................................24, 33
Piggy-back covers .......................................................................6,13
Itontoon covers ...........................................................................15
Quick-acting cleats ....................................................................12,26
Rack-back operation ........................................................................8
Rack and pinion operation .................................................................13
Records ...................................................................................49
Replacing seals .......................................................................24,42
Rolling covers ............................................................................12
Rubber seals ..............................................................................21
Safety.................................................................................18,30
Seal cross-sections....................................................................22, 23
Seal maintenance ..........................................................................42
Seal replacement.......................................................................24, 42
Seal wear.........................■........................................................28
Sealants...................................................................................49
Scaling arrangements ......................................................................21
Sealing tape...........................................................................38, 49
Seaworthiness..............................................................................48
Securing...............................................................................26, 32
Security...................................................................................17
Side-rolling covers.................................................................12, 13, 35
Single-pull covers ........................................................................11
Sliding seal ...........................................................................22.23
Spares ....................................................................................45
Sponge core seal ......................................................................22. 23
Stacking covers ...........................................................................14
Steel-to-steel geometry'...................................................................20
Strength...................................................................................16
Support ...............................................................................18, 33
Surveys ...................................................................................34
Tape.......................................................................................38
Temporary repairs......................................................................33. 45
Temporary sealants.........................................................................38
Testing methods............................................................................36
Types of hatch cover........................................................................5
Ultrasonic test............................................................................37
Watcrscal..................................................................................21
Weathertightness.......................................................................18, 19
60

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