DNV Piping Systems

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RULES FOR CLASSIFICATION OF

SHIPShttp://exchange.dnv.com/publishi ng/rulesship/2011-01/ts406.pdf

NEWBUILDINGSMACHINERY AND SYSTEMS MAIN CLASS

PART 4 CHAPTER 6

PIPING SYSTEMSJANUARY 2011

CONTENTSSec. Sec. Sec. Sec. Sec. Sec. Sec. 1 2 3 4 5 6 7

PAGE

General Requirements.......................................................................................................... 6 Materials .............................................................................................................................. 9 Design Principles ............................................................................................................... 14 Ship Piping Systems .......................................................................................................... 16 Machinery Piping Systems ................................................................................................ 28 Pipes, Pumps, Valves, Flexible Hoses and Detachable Pipe Connections etc. ................. 37 Manufacture, Workmanship, Inspection and Testing ........................................................ 55

DET NORSKE VERITASVeritasveien 1, NO-1322 Hvik, Norway Tel.: +47 67 57 99 00 Fax: +47 67 57 99 11

CHANGES IN THE RULESGeneral As of October 2010 all DNV service documents are primarily published electronically. In order to ensure a practical transition from the print scheme to the electronic scheme, all rule chapters having incorporated amendments and corrections more recent than the date of the latest printed issue, have been given the date January 2011. An overview of DNV service documents, their update status and historical amendments and corrections may be found through http://www.dnv.com/resources/rules_standards/. Main changes Since the previous edition (July 2008), this chapter has been amended, most recently in January 2011. All changes previously found in Pt.0 Ch.1 Sec.3 have been incorporated and a new date (January 2011) has been given as explained under General. In addition, the layout has been changed to one column in order to improve electronic readability. Amendments January 2011 General

References to Pt.4 Ch.1 have been corrected in the following items: Sec.4 D107. Sec.4 H104. Sec.5 A101, A102 and A103. Sec.5 I301.

The electronic pdf version of this document found through http://www.dnv.com is the officially binding version Det Norske Veritas Any comments may be sent by e-mail to rules@dnv.com For subscription orders or information about subscription terms, please use distribution@dnv.com Computer Typesetting (Adobe Frame Maker) by Det Norske Veritas

If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of Det Norske Veritas, then Det Norske Veritas shall pay compensation to such person for his proved direct loss or damage. However, the compensation shall not exceed an amount equal to ten times the fee charged for the service in question, provided that the maximum compensation shall never exceed USD 2 million. In this provision "Det Norske Veritas" shall mean the Foundation Det Norske Veritas as well as all its subsidiaries, directors, officers, employees, agents and any other acting on behalf of Det Norske Veritas.

Rules for Ships, January 2011 Pt.4 Ch.6 Contents Page 3

CONTENTSSec. 1 General Requirements ....................................................................................................................... 6A. Classification.................................................................................................................................................................. 6 A 100 Application............................................................................................................................................................ 6 B. Definitions ...................................................................................................................................................................... 6 B 100 Terms .................................................................................................................................................................... 6 C. Documentation .............................................................................................................................................................. 7 C 100 Plans and particulars ............................................................................................................................................. 7 D. Signboards ..................................................................................................................................................................... 8 D 100 General.................................................................................................................................................................. 8 D 200 References............................................................................................................................................................. 8

Sec. 2A. A A A A A A A A

Materials ............................................................................................................................................. 9

Piping Systems............................................................................................................................................................... 9 100 General.................................................................................................................................................................. 9 200 Carbon and low alloy steels .................................................................................................................................. 9 300 Copper and copper alloys...................................................................................................................................... 9 400 Grey cast iron........................................................................................................................................................ 9 500 Nodular cast iron of the ferritic type..................................................................................................................... 9 600 Nodular cast iron of the ferritic/pearlitic and pearlitic type................................................................................ 10 700 Plastic pipes ........................................................................................................................................................ 10 800 Material certificates ............................................................................................................................................ 12

Sec. 3A. A A A A

Design Principles .............................................................................................................................. 14

Arrangement................................................................................................................................................................ 14 100 Piping systems .................................................................................................................................................... 14 200 Operation of valves ............................................................................................................................................ 14 300 Valves on ship's sides and bottom ...................................................................................................................... 14 400 Fittings on watertight bulkheads......................................................................................................................... 15

Sec. 4

Ship Piping Systems ......................................................................................................................... 16

A. General ......................................................................................................................................................................... 16 A 100 Application.......................................................................................................................................................... 16 B. Basic Requirements for Drainage of Compartments and Tanks .......................................................................... 16 B 100 General................................................................................................................................................................ 16 B 200 Prevention of unintentional ingress of water into compartments or between compartments ............................. 16 C. Drainage of Cargo Holds ............................................................................................................................................ 16 C 100 General................................................................................................................................................................ 16 C 200 Cargo holds carrying alternately liquid cargo, ballast and dry cargo ................................................................. 17 D. Drainage of Cargo Deck Spaces................................................................................................................................. 17 D 100 General................................................................................................................................................................ 17 D 200 Additional requirements for cargo spaces with fixed water-spraying system or high-expansion foam system. 17 E. Drainage of Dry Compartments other than Machinery Spaces of Category A and Cargo Holds ..................... 18 E 100 General........................................