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PERT Type II Thermal Pipe
Heat Pipe Series

PERT Type II Thermal Pipe

PE-RT  II  prefabricated  directly  buried  insulation  pipe  -  high-density polyethylene outer protection pipe polyurethane foamed prefabricated directly buried thermal insulation composite plastic ( referred to as PE-RT II thermal insulation composite pipe plastic pipe) , which is closely combined with high- density polyethylene outer protection pipe , polyurethane foam insulation layer and working pipe . PE-RT II prefabricated directly buried insulation pipe has excellent performance and is used in the urban central heating secondary pipe network pipeline system , its outer protective layer, insulation layer, working pipe  three  parts ,  the  outer  protective  layer  material  is  high-density polyethylene; The insulation layer is made of rigid polyurethane foam; The PE- RT II working pipe is made of type II heat-resistant polyethylene ( PE-RT II) special pipe raw material , which is resistant to low and high temperatures up to -40 to 110 ° C.

    ApplicationApplication

    PERT Type II thermal pipe01
    01
    7 Jan 2019
    1. Heating system: Widely used in underfloor heating systems, as a hot water circulation pipe, to ensure that the heat is evenly distributed to each room.
    2. Hot water supply: In hot water supply systems for domestic and commercial premises, PERT pipes efficiently transfer hot water to the point of use.
    3. Industrial fluid transfer: In  the  chemical,  petroleum,  pharmaceutical  and  other industries, it is used to transmit non-corrosive or low-corrosive fluids.
    4. Piping systems for thermal power plant heat transfer.

    PROPERTIESPROPERTIES

    Characteristics Requirements
    ash content   (600±25)℃ True color≤ 0. 1%Coloring≤ 0.8%
    Oxidation induction time 210 °C ≥30 min
    Hydrostatic test at 95 ° C/ 1000 hAfter oxidation induction time 210 °C ≥24 min
    (110±2)℃Longitudinal retraction rate ≤2%
    190℃Melt mass flow rate The difference between the measured value of the corresponding raw material should not exceed ±0. 3g/10min and the change rate should not exceed 20%
    Thermal stability in the hydrostatic statePE-RT I:1 .9 MPa PE-RT Ⅱ:2 .4 MPa110℃ , 8760 h No cracking, no leakage
    Light transmittance ≤0.2%
    Permeability 40°C ≤0. 32mg/(m²·d)
    Resistant to slow crack growthIncision test ( NPT)0.92 MPa,80℃,500 h   No cracking, no leakage

    Hydrostatic strength of the pipe
    material Requirements Characteristics Numberof specimens
    Hydrostatic should be Mpa Test temperature ° C Test time h
    PE-RT I No cracking, no leakage 9.9 3.8 3.6 3.4 20 95 95 95 1 22 165 1000 3
    PE-RT Ⅱ No cracking, no leakage 1 1.2 4. 1 4.0 3.8 20 95 95 95 1 22 165 1000 3
    PERT Type II thermal pipe02
    PERT Type II thermal pipe03

    Product performanceperformance

    Nominal

    outer

    diameter

    Nominal wall thickness en

    Tube series S

    5.0 4.0 3.2 2. 5

    Standard size ratio

    SDR 1 1 SDR 9 SDR 7.4 SDR 6
    8 1.0 1.0 1. 1 1.4
    10 1.0 1.2 1.4 1.7
    12 1.3 1.4 1.7 2.0
    16 1. 5 1.8 2.2 2.7
    20 1.9 2.3 2.8 3.4
    25 2.3 2.8 3. 5 4.2
    32 2.9 3.6 4.4 5.4
    40 3.7 4. 5 5. 5 6.7
    50 4.6 5.6 6.9 8.3
    63 5.8 7. 1 8.6 10. 5
    75 6.8 8.4 10.3 12. 5
    90 8.2 10. 1 12.3 15.0
    1 10 10.0 12.3 15. 1 18.3
    125 1 1.4 14.0 17. 1 20.8
    140 12.7 15.7 19.2 23.3
    160 14.6 17.9 21.9 26.6
    180 16.4 20. 1 24.6 29.9
    200 18.2 22.4 27.4 33.2
    225 20. 5 25.2 30.8 37.4
    250 22.7 27.9 34.2 41. 5
    280 25.4 31.3 38.3 46. 5
    315 28.6 35.2 43. 1 52.3
    355 32.2 39.7 48. 5 59.0
    400 36.3 44.7 - -
    450 40.9 50.3 - -
    500 45.4 55.8 - -
    560 50.8 62. 5 - -
    630 57.2 70.3 - -

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