The global liquified petroleum gas (LPG) cylinder manufacturing market is projected to reach a market size of about $4.7-billion by 2026, with an average growth rate of about 3.6% during the forecast period, according to a report issued by market intelligence provider Transparency Market Research last month. LPG, sometimes also referred to as simply propane or butane, is typically stored in gas cylinders or tanks, which are pressure vessels that keep the LPG at above atmospheric pressure.