Fiberglass Tube(include fiberglass round tube,fiberglass square tube and fiberglass rectangular tube),heat insulation tube heat insulation tube are made through pultrusion process. During the pultrusion process, the raw materials are pulled through a heated steel forming die using a continuous pulling device.heat insulation tube are made of different resins reinforced with fiberglass by pultrusion technology.heat insulation tube are widely used in many areas. Fearures of heat insulation tube: ♦Corrosion Resistant ♦ Low Conductivity - Thermally and Electrically ♦ Non-Magnetic - Electromagnetic Transparency ♦ Light Weight and High Strength ♦ Dimensional Stability ♦ Low Maintenance