PDF Publication Title:
Text from PDF Page: 028
2.4.5 The use of nodular cast iron in class I piping shall be subject to special consideration on a case by case basis. 2.4.6 Nodular cast iron shall not be used for media having a temperature exceeding 350°C. The use of nodular cast iron for media having a temperature below 0°C shall be considered in each particular case. 2.4.7 Nodular cast iron of the ferritic/pearlitic and pearlitic type shall normally be subject to the same limitations of use as for grey cast iron in [2.4.1] and [2.4.2]. In addition, nodular cast iron pipes of the ferritic/pearlitic type with an elongation A5 of at least 7% may be used in bilge and ballast lines in pipe tunnels in double bottom. 2.5 Plastic pipes 2.5.1 Plastic pipes used in systems and locations according to Table 3shall meet the requirements specified therein. The permitted use and the requirements for the piping are in conformance with IMO Resolution A.753(18) Guidelines for the Application of Plastic Pipes on Ships. 2.5.2 All pipes, except those fitted on open decks and within tanks, cofferdams, pipe tunnels and ducts, if separated from accommodation, permanent manned areas and escape ways by means of an A class bulkhead, shall have low surface flame spread characteristics not exceeding average values listed in IMO Resolution A.753(18) Appendix 3. Surface flame spread characteristics shall also be determined using the test procedures given in ASTM D635 or in other national equivalent standards. 2.5.3 Where a fire protective coating of pipes and fittings is necessary for achieving the fire endurance level required, it shall meet the following requirements: a) The pipes shall be delivered from the manufacturer with the protective coating on. b) The fire protection properties of the coating shall not be diminished when exposed to saltwater, oil or bilge slops. It shall be demonstrated that the coating is resistant to products likely to come into contact with the piping. c) In considering fire protection coatings, such characteristics as thermal expansion, resistance against vibrations, and elasticity shall be taken into account. d) The fire protection coatings shall have sufficient resistance to impact to retain their integrity. Guidance note: Alternatively to [2.5.1] to [2.5.3] the approach for establishing design performance requirements given in UKOOA document Specification and Recommended Practice for use of GRP piping offshore, may be used. ---e-n-d---o-f---g-u-i-d-a-n-c-e---n-o-t-e--- 2.5.4 In addition to the use permitted by Table 3 plastic pipes may also be used for pneumatic and hydraulic control pipes within closed control cabinets, with the following exceptions: — steering gear — systems for remote control of: — fire extinguishing systems — seawater valves (ballast and cooling) — valves on fuel oil service tanks — valves in bilge and fuel oil systems. Offshore standards, DNVGL-OS-D101. Edition January 2018 Marine and machinery systems and equipment Page 28 DNV GL AS Chapter 2 Section 2PDF Image | Marine and machinery systems and equipment 2018
PDF Search Title:
Marine and machinery systems and equipment 2018Original File Name Searched:
DNVGL-OS-D101.pdfDIY PDF Search: Google It | Yahoo | Bing
Development of a solar powered Electric Ship The Electricship website originally started off as a project to develop a comprehensive renewable, affordable, modular electric ship... More Info
Modular Boat Hull Composite The case for a unsinkable, modular composite hybrid boat hull... More Info
MS Burgenstock Hybrid Electric Catamaran Lake Lucerne Unique shuttle servicing Lucerne to the Burgenstock Resort... More Info
Ground Power Unit GPU Powered by Lithium Ion Batteries The goal of the Ground Power Unit is to provide a readily accessible, modular, ready-to-power solution for remote power... More Info
| CONTACT TEL: 608-238-6001 Email: greg@electricship.com | RSS | AMP |