Pre-insulated steel reducer
A pre-insulated steel reducer is a type of pipe fitting that is used in a pipe system to reduce its size from one location to another. It’s used in pre-insulated piping systems where there is a need to connect two pipes of different diameters while maintaining the thermal insulation properties of the system.
The reducer consists of three primary components:
Steel Reducer: This is the innermost component that provides the actual reduction in pipe size. It’s typically made from carbon steel or stainless steel and is designed to withstand the pressure and temperature of the fluid being transported.
Insulation Layer: Surrounding the steel reducer is a layer of insulation, often made from polyurethane foam. This layer provides thermal insulation, reducing heat loss (or gain, in the case of cooling systems) and thereby increasing the energy efficiency of the system.
Outer Jacket: The outermost layer is typically a casing made of high-density polyethylene (HDPE). This casing provides mechanical protection for the insulation and the steel reducer, as well as acting as a barrier to moisture and other environmental conditions.
It’s worth noting that the specific design and materials used for a pre-insulated steel reducer may vary based on the requirements of the specific application, including the operating temperature and pressure, the type of fluid being transported, and the environmental conditions. As with any component in a piping system, a pre-insulated steel reducer should be installed and maintained in accordance with the manufacturer’s instructions to ensure its longevity and performance.
| Product Indexes | Reference Standard | Standard Requirement | Our product value |
| Outer protection pipe | |||
| Density (kg/m3 ) | CJ/T114-4.2.3.1 | ≥940 | 948.2 |
| Elongation at break (%) | CJ/T114-4.2.3.4 | ≥350 | 618 |
| Tensile yield strength (MPa) | CJ/T114-4.2.3.4 | ≥19 | 20.5 |
| Longitudinal shrinkage rate (%) | CJ/T114-4.2.3.5 | ≤3 | 1.23 |
| Long term Mechanical properties | CJ/T114-4.2.3.6 | >1500h(80℃, 4.0 MPa)free from damage | Pass |
| The difference of the melt flow rate (g/10min) | CJ/T114-4.2.3.2 | ≤0.5 | 0.11 |
| Carbon Black Content % | CJ/T114-4.2.3.1 | 2.5±0.5 | 2.4 |
| Polyurethane insulation layer | |||
| Density (kg/m³) | CJ/T114-4.3.2 | ≥60 | 71.1 |
| Average pore size (mm) | CJ/T114-4.3.1 | ≤0.5 | qualified |
| Percentage of close area(%) | CJ/T114-4.3.1 | ≥88 | 94 |
| Compressive strength(MPa) | CJ/T114-4.3.3 | ≥0.3 | 0.58 |
| Water absorption(%) | CJ/T114-4.3.4 | Immersion in boiling water 90 minutes, bubble water absorption should be not more than 10% | ≤5.53 |
| Working steel pipe | |||
| Seamless steel pipe(≤DN150) | GB8163 | 20# | qualified |
| Spiral steel pipe(≥DN200) | GB/T9711 or SY/T5037 | Q235B | qualified |
| Insulation Reducer | ||
| No. | Norminal diameter DNXDN(mm) | L(mm) |
| 1 | 50×40 | 1080 |
| 2 | 70×50 | 1080 |
| 3 | 80x(50～70) | 1100～1090 |
| 4 | 100x(50, 70, 80) | 1080, 1090, 1100 |
| 5 | 125x(70～100) | 1100 |
| 6 | 150x(80～125) | 1190 |
| 7 | 250x(100～200) | 1190～1300 |
| 8 | 300x(125～300) | 1250～1450 |
| 9 | 350x(150～300) | 1250～1500 |
| 10 | 400x(200～350) | 1250～1550 |
| 11 | 450x(250～400) | 1250～1550 |
| 12 | 500x(300～450) | 1250～1550 |
| 13 | 600x(350～500) | 1250～1550 |
| 14 | 700x(400～600) | 1450～1750 |
| 15 | 800x(450～700) | 1450～1850 |
| 16 | 900x(500～800) | 1550～2050 |
| 17 | 1000x(600～900) | 1550～2150 |
| 18 | 1200x(700～1000) | 1550～2150 |
Pre-Insulated Pipes • Heat loss during transfer is at a minimum level. • Provides ease of use, transportation and assembly. • It is resistant to corrosion. • It has a lifetime of more than 50 years under 120 ° C continuous temperature. • Due to the heat conduction coefficient of the polyurethane used, there is less heat loss compared to the classical system.Because the sheath pipe is HDPE, it provides 100% sealing.
abtersteel manufactures its product range for district cooling strictly in compliance with EN17415-1, EN17415-2, EN17415-3, EN489 and other relevant standards, which will ensure a technical lifetime of minimum 50 years when designed and installed correctly.
Polyurethane foam insulated steel pipe also referred as urethane foam pre-insulated piping, PU district heating pipesis the insulation pipe with rigid polyurethane foam plastic as its insulation material, made of inner carrier steel pipes, middle rigid polyurethane foam insulation layer and outer protective layer.
Pre-insulated pipes, manufactured in accordance with the TS EN 253 standard, have an insulation lifespan of 30 years when continuously operated at 120-140℃, 50 years at 115℃, and over 50 years at temperatures below 115℃.
Polyurethane insulation pipe (black jacket insulation pipe, polyurethane insulation pipe and its connecting parts, including insulation tee, insulation reducer, insulation elbow, insulation bend pipe, insulation fixed joints, etc.) is suitable for urban heating, electric heating, water transmission and insulation, oil pipeline, plumbing pipe, air conditioning pipe, electric power pipe, thermal pipe...Pipeline insulation buried in the project is widely used .It has many advantages, such as environmental protection and energy saving, anti-corrosion and heat preservation, anti-freezing and cold resistance, economy and beauty, and reducing heat loss.
Purpose: The steel Tee fitting provides the structural strength and piping connectivity, while the insulation helps reduce heat gain or loss through the pipe. This makes pre-insulated steel Tees well-suited for heating and cooling distribution systems where temperature maintenance is important.
