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wr@insulatedpipeline.com
Number of visits：57 seconds Update time：2025-12-14
Current industrial heating power system, municipal government supply heating system, direct buried thermal insulation steel pipe supported vapor steam, hot water or hot oil transport work. The direct effect of the direct effect on the performance of the system is the efficiency of the system, and the efficiency of the operation is as follows. This is an important objective for design and construction coordination.
(1) Loss of pipe heat
The amount of heat passing through the pipe is lost to the outside world.
Insufficient insulation layer thickness, high heat resistance, poor construction and urban growth.
(2) Heat loss of interfaces and fittings
Elbows, tees, flanges, and welded joints are thermal bridge areas with poor insulation effects.
Improper construction, interface voids, and cracks can all increase local heat loss.
(3) Heat loss caused by moving temperature fluctuations
When the high temperature steam or hot water is stopped, the heat retention layer is lost and the heat is lost.
Due to the large temperature difference during long-distance shipping, there is also considerable wear and tear on the University of California system.
(4) Vascular excretion leakage
Due to the preservative or heat insulation layer damage, the pipe can be excreted and drained, and the guiding capacity is wasted.
Buried pipes receive soil acidity, groundwater influence, productivity and biodegradation.
(1) Excellent pipe material and heat insulation material
Selection of low heat thermal insulation material: hard foam, rock or glass is commonly used.
Reasonable insulation layer thickness: Extended pipe diameter, increased transportation temperature, increased required insulation thickness.
Waterproof and tide-proof insulation layer: Water absorption, low temperature insulation performance, and increased heat resistance.
(2) Improve interface and pipe insulation
Thickened insulation for elbows, tees, and flanges: Increase the thickness of the insulation layer for the thermal bridge area.
Use professional interface insulation wrapping or molding kits to ensure dense construction and reduce gaps.
Sealing treatment of welds and pipe ends: to avoid local heat loss or moisture infiltration.
(3) Pipeline laying and operation management
Optimize pipeline layout: shorten pipeline length as much as possible to reduce pump power consumption.
Control conveying temperature and pressure: maintain stable operation and reduce frequent start stop.
Use expansion joints or sliding interfaces to alleviate thermal expansion and contraction, and avoid damage to the insulation layer.
(4) Preservative protection
Outer tube preservative treatment: FBE layer or PE outer tube, prevent groundwater rot.
Regular cruise: Complete insulation layer, mouth seal, antiseptic layer.
Time-repair damage: cracking, drying, and shedding of the insulation layer.
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| Stage | Specific Measures | Standards / Instructions | Effect on Energy Loss Reduction |
|---|---|---|---|
| Material Selection | Use low thermal conductivity polyurethane, rock wool, or glass wool | Insulation density ≥ 60 kg/m³ | Reduces pipeline heat loss |
| Insulation Thickness | Select thickness according to pipe diameter and temperature | High-temperature pipes ≥ 50 mm, medium-temperature pipes ≥ 40 mm | Provides stable insulation and reduces heat dissipation |
| Joints & Fittings | Apply thickened insulation on elbows, tees, and flanges | Use molded kits or insulation wraps | Reduces thermal bridging losses |
| Welds & Pipe Ends | Seal and anti-corrosion treatment | Heat-shrink sleeves or anti-corrosion coatings | Prevents local heat leakage |
| Pipeline Layout | Shorten pipe length and arrange layout reasonably | Design for minimum pipeline length | Reduces pump energy consumption and heat loss |
| Transport Control | Maintain stable temperature and pressure | Avoid frequent start-stop cycles | Minimizes repeated thermal energy loss |
| Thermal Expansion & Contraction | Install expansion joints or sliding interfaces | Mandatory for pipelines longer than 100 m | Prevents insulation layer damage and reduces heat loss |
| Anti-Corrosion & Maintenance | Regular inspections and timely repairs | Check every six months or annually | Prevents water ingress corrosion that causes heat loss |
IV, conclusion
The ability of direct-buried thermal insulation pipes is lost, mainly due to internal pipes, openings, heating pipes, and excretory leaks.
The core strategy for reducing low capacity and reducing capacity: material quality → heat insulation construction → management efficiency → operational management → periodic maintenance.
Falling land: General selection of low-temperature heat insulation materials, thickened contact insulation, improved management, periodic maintenance, possible reduction of low capacity loss, high system efficiency, completion of the process.
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