Heated Hose – Standard Liquid & Gas Hoses Isopad IHH-ST4A/ST4D (to 400°C)

Heated Hose - Standard Liquid & Gas Hoses Isopad IHH-ST4A/ST4D (to 400°C)

Heated Hose – Standard Liquid & Gas Hoses Isopad IHH-ST4A/ST4D (to 400°C)

Thermocoax Isopad IHH-ST4A/ST4D is a flexible heated hose for liquid and gaseous media with a maximum operating temperature of 400°C.

The standard versions of the IHH-ST4A/ST4D heated hose have corrugated stainless steel inner hose constructions with stainless steel braiding for pressurised operation. The thermal insulation consists of high temperature fleece and silicone foam and mechanical protection is provided by a stainless steel braid and soft EPDM endcaps.

Built-in Pt100 sensors provide optimum temperature control for the medium and homogeneous heat distribution is achieved using evenly wrapped resistance heating cable throughout the hose.

Heated Hose - Standard Liquid & Gas Hoses Isopad IHH-ST4A-ST4D (to 400°C)

Isopad IHH-ST4A-ST4D Heated Hose – Illustration


Area ClassificationNonhazardous, Ordinary Area
Ingress ProtectionIP54
Electrical Protection ClassClass I
Maximum Withstand Temperature (Power Off)400ºC
Ambient Temperature Range-20ºC +40ºC
LengthUp to 19m (Available in steps of 0.1m)
TolerancesAccording to DIN 20066
Nominal Width4, 6, 8, 10, 13mm
Heater TypeResistance Heating Cable
MaterialVarious Alloys
Material of InsulationGlass Silk
Material of Outer SheathWoven Glass Silk
CarrierStainless Steel Braid
Inner HoseCorrugated Stainless Steel Hose
FittingsAGR or DKR according to ISO 228/1
Fitting MaterialStainless Steel
Thermal Fabric Fibre InsulationMeta-Aramide-Fleece + AES-wool of 8 to 12mm Thickness
Thermal Foam InsulationSilicone of 9 to 11mm Thickness
Outer ProtectionStainless Steel Braid
Connection Length1.5m
Cross SectionDepending On Design
Maximum Operating Temperature180ºC
Insulation MaterialSilicone
Sensor TypePT100 Two Wire DIN Class B
Sensor Lead Length1.5m
Lead Cross SectionDepending On Design
Sensor Lead MaterialSilicone
Nominal Operating Voltage120 or 230 VAC
Nominal PowerDepending On Design
Power Per MeterMaximum 150w/m (See Performance Table)
Minimum Insulation Resistance100MΩ
Maximum Operating Temperature400ºC
Maximum Operating PressureSee Performance Table
Minimum Bend RadiusSee Performance Table
Options for Special VersionsOther nominal sizes and inner hoses, e.g. supplied components for individual heating
Sizes up to 120 m
Sensor types, e.g. thermocouples Type K, Type J, etc.
Supply voltage up to 400 V, single-phase or three-phase
Higher power outputs
Increased ingress protection, e.g. IP65 for outdoor applications
Increased pressure resistance, up to 475 bar at 100°C (depending on nominal diameter)
Other materials, e.g. for applications recommending silicone free production
Approved components for the use in hazardous areas according to IECEx and ATEX
Replaceable inner hoses for nonpressurized gas analysis
Premounted plugs and special supply and messenger leads
Controlling devices and high temperature lock-out thermostats


Heated Hose – Standard Liquid & Gas Hoses Isopad IHH-ST4A/ST4D (to 400°C) – Performance Table

Nominal DiameterPower (w/m)Maximum Static Pressure (Bars)Minimum Bend Radius (mm)
Codemmat 100ºCat 20ºCat 100ºCStaticDynamic
Dynamic performance represents two dimensional single piston stroke per second (1 Hz) with compressed air (medium) 6 bars at 100°C operating and 20°C ambient temperature.
Dynamic performance of heated hoses is recommended to be tested for each individual application


ATEX heated hoses are available for Zone 1 and Zone 2 hazardous areas.

ATEX Heated Hoses

Hazardous Area Hoses