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Category: Insulation pipe series
Precast Direct-buried Steam Pipeline
Corresponding pipeline thermal insulation materials are designed and supplied to meet the requirements for underground buried installation. One-step formed ceramic fiber pipe shells are provided according to different medium temperatures. The product features low thermal conductivity, short construction period, long service life, energy conservation, environmental friendliness, non-combustibility and water resistance.
Optimal application scope: Suitable for conveying liquids and gases at temperatures ranging from 150 °C to 400 °C with pressure not exceeding 1.6 MPa. It is widely adopted in thermal insulation projects for petroleum and chemical pipelines, central heating pipe networks, municipal works, etc.
Excellent thermal insulation performance: Ceramic fiber pipe shell is Class A non-combustible thermal insulation material with low thermal conductivity, low bulk density and stable geometric shape. Its physical properties and geometry are slightly affected after being soaked and dried. Seamless connection between service pipe and insulation layer effectively reduces heat loss. A clearance of less than 25 mm is reserved between the insulation layer and outer casing pipe for enhanced thermal insulation.
Reduced project cost: On one hand, the directly buried insulation pipe requires no additional pipe trench and can be buried directly underground or underwater, simplifying construction and shortening the construction period. On the other hand, the internal fixed support technology enables complete elimination of external fixed concrete buttresses.
Safe and reliable: The outer steel casing boasts high strength and excellent sealing performance for effective waterproofing and anti-permeation. Elbows, tees, bellows compensators, valves and other fittings of the service steel pipe are all arranged inside the steel casing. The entire service pipeline operates in a fully sealed environment with high safety.
Outstanding corrosion resistance: The inner service steel pipe is coated with high-temperature resistant anti-corrosion paint to effectively prevent corrosion and extend service life. The outer casing pipe adopts 3PE or coal tar epoxy paint anti-corrosion treatment. The breakdown voltage exceeds 2000 V. It can adapt to various complex soil conditions, achieving a service life of over 30 years for the outer casing pipe.
| Temp / ℃ | Outer Diameter / mm | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 700 |
| 219 | 273 | 325 | 377 | 426 | 478 | 529 | 630 | 720 | ||
| 400 | Ceramic Fiber Pipe / mm | 175 | 185 | 195 | 195 | 195 | 205 | 205 | 205 | 215 |
| 350 | Ceramic Fiber Pipe / mm | 160 | 170 | 180 | 180 | 180 | 190 | 190 | 190 | 200 |
| 300 | Ceramic Fiber Pipe / mm | 155 | 160 | 165 | 170 | 175 | 180 | 180 | 185 | 190 |
| 250 | Ceramic Fiber Pipe / mm | 150 | 155 | 160 | 165 | 165 | 170 | 170 | 175 | 180 |
