The general assumption behind insulation design of industrial installation is to meet HSE rules, which is to keep the temperature of 50C-60C of insulation cladding. The aim of insulation is to limit heat loss and therefore to increase heat production efficiency. Choosing the right insulation means cost reduction of industrial installation maintenance afterwards. Economic insulation is a ratio of financial means spent on insulation against cost of maintenance. Estimation of reimbursement helps to take the decision to invest in insulation. Steam pipeline insulation analysis proves application of economic insulation. The thickness of insulation helps to recover the loss due to application of insulation according to HSE rules, keeping 50C-60C temperature of insulation cladding.