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Help CenterNEMA X/PFCP21 Paper Phenolic Tubes (HP2065, 3520)
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Description
X/PFCP21/HP2065 Paper Phenolic Tubes are high-performance insulation components engineered for demanding industrial and electrical environments. They are made from a premium paper-phenolic composite, combining the mechanical strength of paper with the thermal and chemical resilience of phenolic resin. These tubes are designed to maintain structural integrity under extreme heat, moisture, and mechanical stress, ensuring reliable performance over long service life.
We have tubes of below standards:
GOST Standard: 3520
IEC Standard: PFCP21, PFCP22, PFCP23
DIN: HP2065, HP2066, HP2067
NEMA Standard: X, XX, XXX
Features
High mechanical strength, resistant to cracking and deformation
Excellent electrical insulation
Heat and thermal resistant
Low moisture absorption
Chemical and environmental resistance
Long-lasting durability
Applications
Electrical insulation in transformers, capacitors, motors, and switchgear
Protective tubing for electrical wires and motor windings
Machinery components exposed to heat and electrical stressIndustrial settings requiring high-strength, durable insulation solutions
| No. | Item | Unit | Range | Phenolic Paper Lanimates | |||
| PFCP21 | PFCP22 | PFCP23 | 3520 | ||||
| X | XX | XXX | — | ||||
| HP2065 | HP2066 | HP2067 | |||||
| 1 | Flexural Strength (Perpendicular to Laminations) | MPa | ≥ | 100 | 100 | 100 | 90 |
| 2 | Compressive Strength (Axial) | MPa | ≥ | 100 | 80 | 100 | 60 |
| 3 | Shear Strength (Nominal Dia ≤100 mm) | MPa | ≥ | 70 | 70 | 70 | 15 |
| 4 | Electric Strength ⊥ (in oil at 90°C, wall thickness 1.6 mm) | kV/mm | ≥ | — | 11.6 | 7.8 | 8 |
| 5 | Breakdown Voltage Parallel to Laminations (in oil at 90°C) | kV | ≥ | 15 | 50 | 25 | 25 |
| 6 | Dissipation Factor (1 MHz) | — | ≤ | — | — | — | — |
| 7 | Dissipation Factor (48–62 Hz) | — | ≤ | — | — | — | 0.03 |
| 8 | Dielectric Constant (1 MHz) | — | ≥ | — | — | — | — |
| 9 | Insulation Resistance After Water Immersion (Nominal thickness ≥10 mm, nominal inner dia ≥8 mm) |
MΩ | ≥ | 1 | 1 | 5 | 1 |
| 10 | Heat Resistance | ℃ | ≤ | 120 | 120 | 120 | 120 |
| 11 | Water Absorption | mg/cm² | ≤ | 10 | 10 | 5 | 8 |
| 12 | Density | g/cm³ | — | 1.3-1.4 | 1.3-1.4 | 1.3-1.4 | 1.3-1.4 |
| 13 | Flammability | Class | — | — | — | — | — |
| 14 | Standard | / | IEC 61212-3-1:2006 | GB | |||
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