Gas Land would fabricate its Liquid Nitrogen Storage and Vaporization Packages in collaboration with its partner Cryeng. Cryeng Groups origin dates back to 1965 when the design team produced Australia's first generation of Cryogenic Vessels. Product ranges are continually reconstituted to deliver improved performance, reliability and safety by means of taking advantage of the latest design technology (3D Computer Aided Design and Finite Element Analysis), materials and specialist knowledge in the cryogenic industry over almost 50 years. Cryeng Group is 100% Australian owned and operated. Cryeng Group comes under the umbrella of Aquatec Maxcon Group. Aquatec Maxcon employ over 400 skilled staff members in Australia (Queensland, NSW, VIC and SA), Thailand and Indonesia.
Cryogenic Storage Vessels
Cryeng Group are technical experts in the field of storage and distribution systems for Refrigerated Industrial Gases such as Oxygen, Nitrogen, Argon, CO2 and LNG (Liquefied Natural Gas). Cryeng Group is also a major supplier to the Nuclear and Energy sectors. The core product ranges for our double-walled vacuum insulated cryogenic vessels are;
· Designed in accordance with AS 1210 or ASME VIII
· Standard size vessels ranging from 3,000L up to 500,000L
· Customer specials ranging from 500,000L to 2,000,000L
· Vessels of all sizes are available in the vertical and horizontal orientations.
Cryeng builds to specific customer specifications incorporating advanced design techniques such as FEMA for membrane stress analysis. To maximize reliability at the extremely low temperatures involved, thermal analysis for contraction effects at -196 °C is also carried out.
Materials of construction include but are not limited to stainless steel for cryogenic inner vessels as well as low temperature carbon steel for foam insulated vessels. Outer vessels or vacuum jackets are fabricated from carbon steel or stainless steel (as an option) to provide vacuum insulation for the inner vessel.
Vacuum insulated Cryogenic vessels can be designed and manufactured to the AS 1210 or ASME VIII Pressure Vessel code and any other applicable Australian & International Standards. Advanced design technologies allow extremely accurate analysis for every conceivable operating condition prevailing in Australia, including seismic and cyclonic wind conditions to AS 1170, transportation induced loading, normal & abnormal operating pressures and the elements.
Our Cryogenic vessels are fabricated to stringent quality control procedures with the following testing done on all vessels fabricated by the Cryeng Group;
1. Full Hydrostatic Testing for Class 1, 1H, 1S, ASME VIII Div. 1 and Div. 2 Inner Vessels
2. Helium Leak Testing to verify vacuum integrity of inner vessel jacket.
3. Soapy Bubble Testing of all cryogenic valves and external piping
4. Cold Shock Testing of inner vessels with liquid nitrogen for nozzle and pipe integrity check
Cryeng Group offers a range of vaporizers to satisfy customers' requirement. The range includes Pressure Building Coil (PBC) applications and Ambient Air Vaporizer (AAV) with/without forced convection.
The AAV are designed and manufactured according to ASME-U B31.1 or B31.3 built in Cryeng facilities for Industrial gas industry. These vaporizers are designed to boil and super heat gas known as "regasification" from Liquefied gas;
i.e. LNG from -177.5 °C to 15 °C. Two banks of alternating 8-hr cycle AAV clusters are provided for continuous regasification of LNG at a constant rate of 20mmsfd at 40 barg. Each bank consists of 8 aluminium (grade 6061) AAV units/columns, designed to B31.3 or AS4041. Each unit measures approx. 2.4 x 2.4 x 8m high but is subject to change. Automatic control systems are provided to monitor the vaporizer performance and alternate AAV units and/or banks between defrosting mode and operating mode after each 8-hr cycle or at different intervals to better suit local ambient conditions during operation.
Cryeng Also manufactures pressure building coils (PBC) installed on cryogenic storage tanks (LIN, LOX, LAR, LNG, etc.), ISO tanks and road tankers. They are designed to build pressure during decant or can be vaporized to cover peaks in demand and in array of serial or parallel coil arrangements.
The gas send-out temperature is controlled to be not less than -25°C at the AAV outlet manifolds to reduce plant capital cost. The gas will warm up to ambient temperatures during the pipeline transmission to Power Plant.
Ambient Air Vaporizers (AAV) with forced convection for continuous operation option is equipped with either air fans or water spray headers on top of AAV and side covers to confine water within the AAV assembly. It provides much greater heat transfer to the AAV (forced convection) than the ambient air alone (natural convection) thereby increasing heat input to LNG for regasification. This option does not require defrosting mode and only One Bank of standard AAV will suffice. Typically, seawater is used as a free source of water and discharged back to the sea (open loop), however, any town water can be used and recycled (closed loop) at a rate of approximately 2000 LPM.