Long Ton 2 topics · 2 sources ScienceEnergyA unit that equals 20 long hundredweight or 2,240 pounds. Used mainly in England.US DOE Office of Energy Efficiency & Renewable Energy — Glossary of Energy-Related Terms retrieved 2014-05-26 Cite Science› EnergyRenewable Energy(shipping ton) 2,240 pounds. Commonly used in Great Britain.Oregon Dept of Energy — ODOE Glossary of Energy Terms retrieved 2014-06-15 Cite