Overview:
The FlexiHeat XL Resistance Heating Blanket System is a robust,
flexible, and highly reliable solution for preheating pipe welds
prior to and during the welding process. Utilizing durable heating
pads or flexible blankets containing resistance wire elements, it
provides conductive heat directly to the pipe surface. This system
is renowned for its versatility, ability to conform to complex
geometries (like heavy wall pipe intersections), and proven
performance in demanding field conditions for pipelines of all
diameters.
Key Features: Proven Reliability: Simple, robust resistance heating technology with a long
track record in pipeline construction. Superior Conformability: Flexible ceramic fiber or metal-mesh blankets can be tightly
secured around pipes, fittings, valves, and complex weld joints. Excellent Heat Retention: Blankets often include integrated insulation, improving
thermal efficiency and protecting against wind and weather. Modular & Scalable: Heating blankets can be connected in parallel to cover large
areas or multiple zones, controlled by a single or multi-zone power
unit. Cost-Effective Solution: Lower initial capital cost compared to some advanced systems,
with durable blankets offering long service life. Comprehensive Kits: Available in complete kits including blankets, power/control
units, thermocouples, and heat retention covers.
Technical Parameters: Heating Technology: Electric Resistance Heating (Mica, Ceramic Fiber, or Metal
Sheathed Elements). Power Supply: 110V, 220V, 480V AC input. Common units: 25 kVA, 50 kVA, 100
kVA. Heating Blanket Temperature: Up to 760°C (1400°F) for standard units; higher temperatures
available. Pipe Coverage: Standard blankets available for common pipe sizes; custom
shapes for special applications. Control System: Solid-state or SCR-based controllers with manual or automatic
temperature control (PID). Multi-zone control capability. Duty Cycle: Designed for 100% continuous duty cycle. Thermal Insulation: Optional ceramic fiber heat retention covers to improve
efficiency.
Performance: Provides stable, controllable heat for sustained preheating periods
required for thick-wall pipeline welding. Ensures code-compliant preheat and interpass temperatures (as per
API 1104, ASME Section IX). High heating capacity suitable for challenging materials and high
wall thicknesses. Durable construction withstands rough site handling.
Primary Applications: Preheat and interpass heating for mainline, tie-in, and repair
welds on cross-country pipelines. Heating for welding on pipeline fittings, elbows, reducers, and
valves. Applications requiring precise heat control on heavy-wall pipe
(e.g., pump station piping, compressor station piping). Ideal for maintenance, repair, and overhaul (MRO) operations on
existing pipelines.
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