Developments in LNG Storage
Publication Date: 2009-May-05
The IP.com Prior Art Database
DEVELOPMENTS IN LNG STORAGE
DILIP PATEL, Project Equipment Procurement Manager JANUSZ T ARLOWSKI, Process Manager CYRIL COLLINS, Process Technology Manager
M.W. KELLOGG LTD.
Presented at SMI Conference
LNG 2000 - 16 & 17 FEBRUARY 2000
DEVELOPMENTS IN LNG STORAGE:
(Paper No. 1651)
o A Patel J Tarlowski
M W Kellogg Ltd.
C:I TEMPILNG2k-7. doc
Paper No. 1651 Page 1 of 13
concrete outer container with flexible inner container and insulation supported by outer tank wall. The tank was taken out of service in 1973 to make repairs to the polyurethane-mylar liner. During the repair operation, residual methane vapours leaking from the insulation ignited causing a major explosion. The tank was not returned to service. Two other 143,000 m3 tanks were completed in 1974 but never placed in service. The last tank using Preload technology was built for Enagas in 1981, which was of 80,000 m3 capacity with both inner and outer PC walls. Kvaerner has licensed the Cryocrete technology and have been active marketing LNG tanks with inner and outer PC walls.
The first large scale application of present day design Full Containment type tanks with PC outer wall, reinforced concrete roof and 9% nickel inner open top tank were constructed for Abu Dhabi Gas Liquefaction Co. and Abu Dhabi National Oil Co (ADNOC). This project began with preparation of project specifications and site plans for ADNOC by M.W. Kellogg Ltd (MWKL) in the late 1970's and was completed by CSI in 1985 with MWKL participation throughout the project. Three 80,000 m3 LNG and four 50,000 m3 LPG tanks were constructed in close proximity to each other. The outer tanks were designed for three external impact hazards, thermal radiation resulting from burnout of one of the adjacent tanks and a postulated vapour cloud explosion. (see ref. 4 )
In addition to postulated external impact hazards, the tanks were designed for sudden rupture (zip failure) of the inner tank, and overfilling of the inner tank resulting in product in the annular space in direct contact with the outer wall. A corner protection (expansion joint) was provided to protect lower portions of the wall. Current day safety standards (SS 7777 & EN14735) do not consider burnout, sudden rupture, or overfilling as realistic design scenarios for the Full Containment designs described above.
Development in 9% Nickel Steel and Tank Standards
In addition to the research and testing programs conducted in the USA in the late 50's/early 60's and subsequent follow-up programs (see ref. 6), work was carried out in the early '80s in improving material properties for improved resistance to initiation and/or propagation of brittle fracture under the sponsorshi...