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Custom Designed, insulated or uninsulated Flat Blankets, offer an elegant, efficient way to apply heat onto large surface areas. Flat, multi-piece designs offer a modular, easy to install solutions. Using low watt density efficient direct heat transfer, Blankets can offer an efficient alternative to large, expensive oven heating. Blankets may be built as small, tape-like formats or large, modular designs with many custom geometries. Flat Blankets start with an inner fabric liner and HTS/Amptek® knitted heat tape element then are closed incorporating outer fabrics with or without an insulation layer.

Features and Specifications

Power density: 1.0 to 12.0 watts/in² (0.16 to 1.5 watts/cm²)
Watts, Volts: Custom KW, 120V/1 to 480/3ph
Size: Custom Modular Sizes for Convenient Install
Weight: Modular, 50lbs (23kg) Max Recommended
Heat Capability: Operating Temperature to 1112°F (600°C)
Max Exposure: 1400°F (760°C)
Power Leads: A-Nickel or Cu-Ni, FLying, Sleever or Armored
Power Plugs: NEMA, Straight, Twist Loc, Pin & Sleeve
Sensors: Process & Limit Thermocouple or RTD
Area Class: Non-Hazardous, Dry


Blanket sizes:
Small Heating Blankets may be constructed like tapes to fit small pipes, vessels and fittings. Large Blankets are limited by weight, typically 50lbs (23kg), but may be constructed in multiples to fit large surfaces.

An inner liner has the mechanically attached heating element and sensors. Then insulation layers may be placed over top with gusset and outer fabrics to enclose the assembly. All Blankets are fabricated to fit the area to cover and double stitched for durability. The materials of construction depend upon the temperature and environment of use. Below 550° F choices can include materials such as Teflon and Silicone, which provide durability and some moisture protection. High temperature Blankets, are constructed of safe fiberglass based fabrics with Fiberglass or Ceramic insulations. Moisture resisting materials or grounding planes may be placed over as a final outer cover.

The Heating Element:
HTS/Amptek® knitted Heating Tape is stitch bonded to the liner of each Blanket to apply the heat where needed. Monotape™ and Duo-Tape® elements are multi-strand insulated resistance wire, knitted into serpentine strips allowing ultimate flexibility that eliminates thermal stress.

Temperature Capability:
900°F (482°C), or AMOX™ to 1400°F (760°C). However, temperatures exceeding 1112°F exposure, are not recom- mended if the Blanket would need to be manipulated once in place. (removed and reinstalled)

Heated Zones:
Typical Blankets have a single zone, however, multiple zones may be arranged having individual power leads and sensors. This arrangement can offer zonal duty-cycle for ultimate control.

Temperature sensors:
Built in thermal sensors such as RTDs or Thermocouples can be installed for process temperature measurement, or directly on the heating element for sensing limit temperature.

Cutouts and Penetrations:
Cut outs and slits for supports, ports and other hardware are typical of most applications. HTS/Amptek® designs preformed Blanket configurations with holes, slits and seams to provide great fit and easy install and removal. Additional flaps and straps cover the exposed seams.

Most common Closures are lacing hook or eyelet flap closure methods.

Contact: HTS/Amptek®
Call or email your questions, or click the quote button for a convenient form to help us with the size and scope of your application.