Polyurethane Insulated Steel Pipe

Polyurethane Insulation Pipe

National standard polyurethane foam insulated pipe utilizes national standard steel pipes, primarily including spiral steel pipes, straight seam steel pipes, and seamless steel pipes.

Polyurethane foam insulated steel pipes have a three-layer structure from the inside out.

Layer 1: Working Pipe Layer

Generally, seamless pipes (GB8163-87), spiral-welded pipes (GB9711-88; SY/T5038-92), and straight-seam welded pipes (GB3092-93) are selected based on design and customer requirements.

Second Layer: Polyurethane Insulation Layer

The product is made by injecting a liquid rigid polyurethane foam into the cavity formed between the steel pipe and the outer sheath using a high-pressure foaming machine. This is commonly referred to as the "pipe-in-pipe foaming process." Its functions include: 1) waterproofing, 2) thermal insulation, and 3) supporting the weight of the thermal network. When the temperature of the conveying medium is between -50℃ and 120℃, a rigid polyurea foam is used as the insulation layer.

Three Layers: High-Density Polyethylene Protective Layer

Preformed black (yellow) plastic pipes with specified wall thickness, serving dual purposes: 1) to protect the polyurethane insulation from damage by mechanical hard objects, and 2) to prevent corrosion and water damage.

Polyurethane thermal insulation pipes have significantly outstanding advantages compared to traditional types of insulation pipes.

1. Excellent thermal insulation performance, with heat loss only 25% of traditional piping materials. Long-term operation can save a significant amount of energy and significantly reduce energy costs.

2. boasts excellent waterproof and corrosion-resistant properties; no need for trenching; can be directly buried underground or in water; easy and quick installation; low overall cost.

3. Exhibits excellent corrosion and impact resistance even under low-temperature conditions, can be directly buried in frozen soil underground.

4. Life expectancy up to 30-50 years; proper installation and use can significantly reduce maintenance costs for the pipeline network.

5. Features adjustable alarm system for automatic detection of pipeline leakage faults, accurately indicating the fault location and triggering an alarm automatically.