LPG – LNG Tanker Truck Loading Skids

S&S Technical was asked to design and fabricate a packaged solutions for a client looking to load trucks at their facility. The customer requested that the systems be dual sided to prevent slow down’s from unavailable unloading spots. Our engineers worked with them to create the best LNG Loading / unloading systems that would meet their specific needs.

How fast can an LNG tanker be unloaded?

Tanker truck capacity will vary in volume capacity, the average tanker truck holds approximately 9,000 gallons. Engineering the correct sized system is crucial. Undersized systems can slow down the LNG unloading and cause backups, leading to less revenue per day. On average customers request systems be designed for unloading 250 – 300 gpm. Incorporating the right compressor into the design is step one in accurate planning.

Other LNG Truck Unloading Equipment Needed

As with any system design, you can get extremely detailed and toss on a lot of equipment that may not be necessary for your needs. There are, though, certain items that make sense. We believe one of the most important are static grounding systems. The Newson Gale Earth-Rite Plus has been a well received and reliable component in our LNG truck unloading skids. Conductive metal objects like tank cars, LACT units, skids, totes and IBCs that come into contact with electrostatically charged liquids can accumulate hazardous levels of electrostatic charge that could discharge static sparks with energies far in excess of the minimum ignition energies of a vast range of combustible gases and vapors. The ignition of combustible atmospheres by static electricity can be prevented by ensuring that such objects are grounded.

The Earth-Rite PLUS is the ideal solution for grounding and bonding a broad range of equipment at risk of igniting combustible gases and vapors. In combination with demonstrating the full range of Class I, Div. 1 approvals for all gas and liquid vapor groups, the Earth-Rite PLUS ensures a continuously monitored 10 ohm, or less, connection is present between the grounded object and a designated true earth grounding point.

What code should be used in the LNG Truck Loading System

All of our LNG truck loading systems are designed in accordance with ASME B31.3. This code required NDE Testing of 10% of the welds, along with through hydrostatic testing of all welded pipe spools. We are diligent in designing the automation for the LNG truck systems using the highest quality C1Div2 electrical enclosures and fittings.

Can I prove the LNG Tucks System

Proving out your system is highly recommended. Our system engineers will ask these questions up front as special equipment needs to be integrated into the system from the beginning. Regular evaluation of your systems performance is recommended as multiple factors can, over time, impact the accuracy of the truck unloading system. Minor adjustments can be made when out of compliance to gain confidence in accuracy and traceability of the system. We recommend you work with a prover company in your area and prove the unloading system once on site.

Loading or unloading LNG from a tanker can be done in 30 minutes with a well-designed system. Work with a company that has experience in the LNG-LPG gas transfer design field.

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