Recommendations For Liquefied Gas Carriers Manifolds
Year: 2018 Language: english Author: SIGTTO Genre: Reference book Publisher: Witherby Publishing Group Ltd Edition: 2nd ISBN: 978-1-85609-769-7 Format: PDF Quality: OCR without errors Pages count: 47 Description: Introduction This document provides recommendations on the layout, strength and fittings for gas carrier manifolds. This version is an update to the previous edition of 'Manifold Recommendations for Liquefied Gas Carriers (2011Y). Scope These recommendations are for liquefied petroleum gas (LPG) carriers and liquefied natural gas (LNG) carriers. For the purposes of this document, the term LPG carrier refers to liquefied gas cargoes carried between the temperature range of 0°C to -104°C These recommendations do not apply to existing ships, and there is no suggestion that existing ships should be altered. It is recognised that some new gas carrier designs may not be able to conform to all of the recommendations in this document, however, this document is intended to serve as a starting point with a view to minimising differences as much as possible
Contents
Contents 1. Introduction.............................................................................................................................................. 1 1.1 Scope...................................................................................................................................................... 3 1.2 Size Categories ..................................................................................................................................... 4 2. Manifold Position...................................................................................................................................... 5 2.1 Manifold - LPG ........................................................................................................................................ 7 2.2 Manifold - LNG ..................................................................................................................................... 12 3. Protection from Cargo Spill ..................................................................................................................... 17 3.1 Deck Protection …………………………………………................................................................................... 19 3.2 Coaming Requirements ....................................................................................................................... 20 3.3 Drip Trays ..............................................................................................................................................20 3.4 Gratings ................................................................................................................................................ 20 3.5 Drainage - LPG...................................................................................................................................... 20 3.6 Drainage - LNG..................................................................................................................................... 20 3.7 Water Curtains for LNG Carriers .......................................................................................................... 21 4. Manifold Design ……......................................................…………………………............................................ 23 4.l Carbon Steel Manifold ........................................................................................................................... 25 4.2 Stainless Steel Manifold....................................................................................................................... 27 4.3 Assumptions used for Load Calculations ........................................................................................... 28 5. Manifold Specification and Fittings ........................................................................................................ 31 5.1 Manifold Flanges.................................................................................................................................... 33 5.2 Presentation Flanges ............................................................................................................................. 34 5.3 Marking of Manifolds ............................................................................................................................. 34 5.4 Distance Pieces....................................................................................................................................... 35 5.5 Reducers and Spool Pieces ...................................................................................................................35 6. Additional Requirements ..........................................……………………………….......................................... 37 6.1 Water and other Connections ............................................................................................................. 39 6.2 Manifold Area Illumination................................................................................................................... 39 6.3 Lifting Equipment and Cargo Hose Support ....................................................................................... 39 6.4 LPG Vessels Involved in Floating Hose Transfers.............................................................................. 39 6.5 Access and Exits from the Manifold Area ........................................................................................... 40 6.6 Access during Cargo Transfer................................................................................................................ 40 7. Bunker Manifolds ..........................•.••..................................................................................................... 41 7.l Number and Arrangement ...................................................................................................................... 43 7.2 Size and Location of Bunker Manifold ............................................................................................... 44 7.3 Reducers and Spool Pieces for Bunkering ................................................................................................. 44 7.4 Strength ................................................................................................................................................. 44 7.5 Oil Spill Containment.............................................................................................................................. 44 7.6 LNG Spill Containment and Protection................................................................................................... 45 7.7 Oil Bunker Hose Saddle ..........................................................................................................................45 7.8 Other Connections..................................................................................................................................45 Annexes................................................................................................................................................................47 Annex 1 - Manifold Strainers ......................................................................................... ..... ... ... .......................49 Annex 2 - Glossary of Terms and Abbreviations ................................................................................................ 50 Annex 3 - References........ ............................................................................................................................... 51
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Recommendations For Liquefied Gas Carriers Manifolds
Year: 2018
Language: english
Author: SIGTTO
Genre: Reference book
Publisher: Witherby Publishing Group Ltd
Edition: 2nd
ISBN: 978-1-85609-769-7
Format: PDF
Quality: OCR without errors
Pages count: 47
Description: Introduction
This document provides recommendations on the layout, strength and fittings for gas carrier manifolds. This
version is an update to the previous edition of 'Manifold Recommendations for Liquefied Gas Carriers (2011Y).
Scope
These recommendations are for liquefied petroleum gas (LPG) carriers and liquefied natural gas (LNG) carriers.
For the purposes of this document, the term LPG carrier refers to liquefied gas cargoes carried between the
temperature range of 0°C to -104°C
These recommendations do not apply to existing ships, and there is no suggestion that existing ships should be
altered.
It is recognised that some new gas carrier designs may not be able to conform to all of the recommendations
in this document, however, this document is intended to serve as a starting point with a view to minimising
differences as much as possible
Contents
Contents1. Introduction.............................................................................................................................................. 1
1.1 Scope...................................................................................................................................................... 3
1.2 Size Categories ..................................................................................................................................... 4
2. Manifold Position...................................................................................................................................... 5
2.1 Manifold - LPG ........................................................................................................................................ 7
2.2 Manifold - LNG ..................................................................................................................................... 12
3. Protection from Cargo Spill ..................................................................................................................... 17
3.1 Deck Protection …………………………………………................................................................................... 19
3.2 Coaming Requirements ....................................................................................................................... 20
3.3 Drip Trays ..............................................................................................................................................20
3.4 Gratings ................................................................................................................................................ 20
3.5 Drainage - LPG...................................................................................................................................... 20
3.6 Drainage - LNG..................................................................................................................................... 20
3.7 Water Curtains for LNG Carriers .......................................................................................................... 21
4. Manifold Design ……......................................................…………………………............................................ 23
4.l Carbon Steel Manifold ........................................................................................................................... 25
4.2 Stainless Steel Manifold....................................................................................................................... 27
4.3 Assumptions used for Load Calculations ........................................................................................... 28
5. Manifold Specification and Fittings ........................................................................................................ 31
5.1 Manifold Flanges.................................................................................................................................... 33
5.2 Presentation Flanges ............................................................................................................................. 34
5.3 Marking of Manifolds ............................................................................................................................. 34
5.4 Distance Pieces....................................................................................................................................... 35
5.5 Reducers and Spool Pieces ...................................................................................................................35
6. Additional Requirements ..........................................……………………………….......................................... 37
6.1 Water and other Connections ............................................................................................................. 39
6.2 Manifold Area Illumination................................................................................................................... 39
6.3 Lifting Equipment and Cargo Hose Support ....................................................................................... 39
6.4 LPG Vessels Involved in Floating Hose Transfers.............................................................................. 39
6.5 Access and Exits from the Manifold Area ........................................................................................... 40
6.6 Access during Cargo Transfer................................................................................................................ 40
7. Bunker Manifolds ..........................•.••..................................................................................................... 41
7.l Number and Arrangement ...................................................................................................................... 43
7.2 Size and Location of Bunker Manifold ............................................................................................... 44
7.3 Reducers and Spool Pieces for Bunkering ................................................................................................. 44
7.4 Strength ................................................................................................................................................. 44
7.5 Oil Spill Containment.............................................................................................................................. 44
7.6 LNG Spill Containment and Protection................................................................................................... 45
7.7 Oil Bunker Hose Saddle ..........................................................................................................................45
7.8 Other Connections..................................................................................................................................45
Annexes................................................................................................................................................................47
Annex 1 - Manifold Strainers ......................................................................................... ..... ... ... .......................49
Annex 2 - Glossary of Terms and Abbreviations ................................................................................................ 50
Annex 3 - References........ ............................................................................................................................... 51
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