ClassNK released CNG Guidelines

04 Aug 2015
‘Guidelines for Compressed Natural Gas Carriers’ are available on the ClassNK website

‘Guidelines for Compressed Natural Gas Carriers’ are available on the ClassNK website

ClassNK has released its ‘Guidelines for Compressed Natural Gas Carriers’, which provide safety requirements for the design and construction of CNG carriers.

The classification society’s latest Guidelines are based on the International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code), which currently outlines safety requirements for LNG carriers.

However, there are currently no applicable international rules for CNG carriers, in which natural gas is stored compressed in the cargo tanks onboard for transportation. So, the guidelines also contain additional requirements taking specific hazards arising from the handling of CNG into consideration.
This comes at a time when energy production and consumption continues to rise with global economic and population growth.

Whilst LNG has been employed mostly in large scale gas fields due to the substantial investment required in liquefaction and storage plants, growing demand for natural gas is generating increased expectation for small to medium scale gas field development and the study of different modes of natural gas transportation at sea. ClassNK says the investment for the entire project can be reduced since no liquefaction, storage, or regasification plant is needed making CNG suitable for short distance transportation.

In its latest forecast, CEDIGAZ, an international not for profit association dedicated to natural gas information, predicts that global natural gas demand will grow by 1.8% a year from 2013 to 2035 with the largest portion of this growth coming from Asia-Oceania and the Middle East.

Natural gas share in world primary energy supply is projected to increase from 21.3% to 23.6% over the same period. As the demand and supply of natural gas increases, the volume of transportation of natural gas will also expand.
The Guidelines for Compressed Natural Gas Carriers are available on the ClassNK website for ClassNK ‘My Page’ users.

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