| Nominal Caliber | Outer Diameter/mm | Wall Thickness of Ordinary Steel Pipe/mm | Wall Thickness of Thickened Steel Pipe/mm |
|---|---|---|---|
| 6 | 10.0 | 2.00 | 2.50 |
| 8 | 13.5 | 2.25 | 2.75 |
| 10 | 17.0 | 2.25 | 2.75 |
| 15 | 21.3 | 2.75 | 3.25 |
| 20 | 26.8 | 2.75 | 3.5 |
| 25 | 33.5 | 3.25 | 4.00 |
| 32 | 42.3 | 3.25 | 4.00 |
| 40 | 48.0 | 3.50 | 4.25 |
| 50 | 60.0 | 3.50 | 4.50 |
| 65 | 75.5 | 3.75 | 4.50 |
| 80 | 88.5 | 4.00 | 4.75 |
| 100 | 114.0 | 4.00 | 5.00 |
| 125 | 140.0 | 4.00 | 5.50 |
| 150 | 165.0 | 4.50 | 5.50 |
Characteristics:
Highly Efficient Insulation Performance: Insulated steel pipe can effectively reduce heat dissipation and have remarkable insulation effects. For example, steel pipes insulated with polyurethane have a very low thermal conductivity. Compared with ordinary steel pipes, they can greatly reduce heat loss, and the heat loss rate can be reduced to around 2% – 3%, thus improving energy utilization efficiency.
Good Anti-corrosion Performance: The outer protective pipe and the insulation layer play a certain anti-corrosion protection role for the service steel pipe. Especially when buried underground, they can prevent the service steel pipe from being corroded by factors such as moisture, changes in acidity and alkalinity, and microorganisms in the soil, thus prolonging the service life of the steel pipe.
Adaptability to Multiple Environments: Whether in underground, underwater or overhead pipeline systems, insulated steel pipes can play their roles in heat preservation and protection. They have good applicability when used in heating pipelines in cold northern regions or in high-temperature steam transmission pipelines in chemical enterprises.
Application Fields:
Heating System: It is a key component of urban central heating systems. It can efficiently transport hot water or steam generated by thermal power plants to various user ends, ensuring minimal heat loss during the transportation process and guaranteeing users’ heating needs.
Petrochemical Industry: It is used to transport high-temperature oil, gas and chemical raw materials. In refineries and chemical plants, insulated steel pipes can prevent the temperature of the medium from dropping too quickly during the transportation process, thus ensuring the normal progress of the production process.
Cold Chain Logistics Industry: In some occasions where low-temperature transportation is required, such as in the transportation pipelines of liquid carbon dioxide, liquid nitrogen, etc., insulated steel pipes can prevent external heat from entering and maintain the low-temperature state of the medium.
