A method of insulating at least one equipment unit having a flow path extending therethrough, the method comprising: designing a subsea equipment assembly comprising an insulation covering an outer surface of the at least one equipment unit, the designing comprising: modeling a temperature profile of the subsea equipment assembly having a fluid within the flow path; identifying at least one hot zone along an interface between the insulation and the outer surface, where the at least one hot zone is exposed to temperatures above a degradation temperature of the insulation (220, 420); designing the insulation to cover the at least one hot zone and to be exposed to temperatures above the degradation temperature of the insulation; and designing the insulation to extend around the at least one hot zone to further cover at least one cold zone adjacent the at least one hot zone, the at least one cold zone exposed to maximum temperatures below the degradation temperature of the insulation (220, 420), such that, in use, all exposed faces of the insulation are subject to maximum temperatures below the degradation temperature; and assembling the subsea equipment assembly, the assembling comprising: disposing insulation around the outer surface of the at least one equipment unit of the subsea equipment assembly based on the designing the insulation to cover the at least one hot zone and based on the designing the insulation to extend around the at least one hot zone to further cover at least one cold zone adjacent the at least one hot zone, such that, in use, all exposed faces of the insulation are subject to maximum temperatures below the degradation temperature. designing a subsea equipment assembly comprising an insulation covering an outer surface of the at least one equipment unit, the designing comprising: modeling a temperature profile of the subsea equipment assembly having a fluid within the flow path; identifying at least one hot zone along an interface between the insulation and the outer surface, where the at least one hot zone is exposed to temperatures above a degradation temperature of the insulation (220, 420); designing the insulation to cover the at least one hot zone and to be exposed to temperatures above the degradation temperature of the insulation; and designing the insulation to extend around the at least one hot zone to further cover at least one cold zone adjacent the at least one hot zone, the at least one cold zone exposed to maximum temperatures below the degradation temperature of the insulation (220, 420), such that, in use, all exposed faces of the insulation are subject to maximum temperatures below the degradation temperature; and modeling a temperature profile of the subsea equipment assembly having a fluid within the flow path; identifying at least one hot zone along an interface between the insulation and the outer surface, where the at least one hot zone is exposed to temperatures above a degradation temperature of the insulation (220, 420); designing the insulation to cover the at least one hot zone and to be exposed to temperatures above the degradation temperature of the insulation; and designing the insulation to extend around the at least one hot zone to further cover at least one cold zone adjacent the at least one hot zone, the at least one cold zone exposed to maximum temperatures below the degradation temperature of the insulation (220, 420), such that, in use, all exposed faces of the insulation are subject to maximum temperatures below the degradation temperature; and assembling the subsea equipment assembly, the assembling comprising: disposing insulation around the outer surface of the at least one equipment unit of the subsea equipment assembly based on the designing the insulation to cover the at least one hot zone and based on the designing the insulation to extend around the at least one hot zone to further cover at least one cold zone adjacent the at least one hot zone, such that, in use, all exposed faces of the insulation are subject to maximum temperatures below the degradation temperature.