PUF Pipe Section & Board

PUF (rigid polyurethane foam) pipe section and board is cold insulation used on cryogenic lines, cold storage, and LPG and refrigeration piping. Its closed-cell content above 90% and thermal conductivity of 0.022 to 0.028 W/mK give strong insulating performance at moderate thickness. Compressive strength of 150 to 250 kPa helps it resist handling damage.

PUF pipe section and board is rated from -180°C to +100°C. The low limit suits cryogenic and LPG service, while the upper limit rules it out for steam or hot process lines, where Rockwool Pipe Section or Calcium Silicate Block & Pipe Section is used. On lines that alternate between cold and hot, check that the peak stays within +100°C.

PUF pipe sections are made for pipe sizes from 15 mm to 600 mm NB and boards in a standard 1200 x 600 mm size, both in 25, 40, 50, 75 and 100 mm thickness, with density of 40 to 48 kg/m³. On cold lines, thickness is chosen to keep the outer surface above dew point; thick systems are often built in layers with staggered joints.

PUF Pipe Section & Board and PIR Board are both rigid closed-cell foams with low thermal conductivity. PIR is generally chosen where better fire behavior is required, such as in building panels and ducts, while PUF is widely used for cold storage, refrigeration and cryogenic piping. PUF is self-extinguishing when made with a fire retardant additive, which should be specified in the enquiry.

Choose PUF Pipe Section & Board for lower conductivity and lighter weight on general cold and cryogenic piping and cold rooms, and Cellular Glass Block & Pipe where the insulation must be non-combustible, impermeable to water vapor and able to carry heavy loads. Cellular glass is often specified in fire-exposed areas and at pipe supports.

Yes, on cold and cryogenic lines PUF needs a continuous, sealed vapor barrier over the insulation, followed by weather protection such as Aluminum Cladding Sheet & Coil or GI cladding. Joints between sections must be tight and sealed, because moisture entering through gaps condenses or freezes and damages the insulation. Cladding on cold lines is best held with Insulation Band & Buckles so the barrier is not pierced.

PUF pipe section and board is listed to ASTM C591 and IS 12436, the Indian standard for preformed rigid polyurethane and polyisocyanurate foam for thermal insulation. If your project specification refers to other standards or needs test reports, tell us in your enquiry and we will confirm what is available for your order.

PUF pipe sections and boards are exported under HS code 39211390, which covers plates and sheets of cellular polyurethane. Importers should check the national sub-heading and duty rate with their customs broker, as preformed pipe sections may be treated differently from flat boards in some countries.

PUF pipe sections and boards are shrink-wrapped and palletized, which keeps them clean and dry and protects edges during container loading. Because rigid foam is light but bulky, volume rather than weight usually fills the container, so 40′HC containers are often used. For a quotation, give pipe NB sizes, lengths, board quantities and thickness.