GasEnthusiast

'Viking Grace' (Source:https://malcolmoliver.files.wordpress.com/2015/06/vikiinggrace.jpg) The 'International Code of Safety for Ships Using Gases or Other Low-Flashpoint Fuels', in short the IGF Code has been adopted by the IMO and it will be in force from 1 January 2017. In this post, I would like to offer an overview of the code and its regulatory background. It will be followed up with detailed posts on some of the chapters in the code which details the technical requirements for the shipboard arrangements. The IGF Code IGF Code The IGF Code is expected to provide the necessary regulations to ensure that ships using gas as a fuel are provided with the minimum required standards for the safe use of gas. It has been in development from 2009 onwards and the final draft was adopted by the Maritime Safety Committee (MSC) at its 95th session in June 2015. It is a pragmatic step from the IMO and it provides the much-required standardisation in terms of the

Can Aluminium be used for LNG applications? The answer is yes. MOSS-Rosenburg type tanks (Independent Type B tanks - Spherical) is fabricated of aluminium alloy 5083 annealed. LNG Vessel - Moss-Rosenburg containment (source:http://www2.gov.bc.ca/assets/gov/taxes/lng.jpg) The use of aluminium for LNG applications is permitted by the IGC Code (Chapter 6). It is also permitted by IGF Code for use in LNG fuel pipe lines as well as containment systems. Aluminium alloy 5083 forms part of the approved 5000 series for marine use. It is supplied annealed and has a UTS 275 to 350 N/mm2. It has a lower melting point of app.660 C when compared with stainless steel. However, this is not a consideration for use in LNG applications. It has a lower elongation rate and also has toughness, which keeps the material properties retained to a temperature of up to -196C. Hence it does not require an impact test (IGC/IGF Codes) However, it compromises on the tensile stress it can take when