(1) The use temperature is high, generally up to 100 ° C, after adding temperature-resistant auxiliary materials, the use temperature can reach 120 ° C.
(2) The foaming agent in polyurethane will continuously replace with the air in the environment due to the diffusion, so that the thermal conductivity increases with time. In order to overcome this disadvantage, a gas impermeable material such as a profiled steel sheet may be used as a surface layer to seal it to limit or slow the displacement.
(3) On-site spraying of polyurethane foam has high temperature, high compression performance and simple construction, and is more suitable for roof insulation than EPS board.
(4) When used for pipelines (especially underground buried pipelines) and roof insulation, reliable waterproof and moisture-proof measures should be taken. At the same time, it should be considered that the thermal conductivity will increase with time, and the sealing material should be used as the protective layer as much as possible.
(5) Due to the high temperature of use, it is mostly used for heating pipes.
(6) The temperature of the smoke is low, and a large amount of smoke and toxic gases are generated in case of fire, and it is not suitable for use as an internal insulation material.
(7) Although the water absorption rate is low, as a heat insulating material, it must not be used as a waterproof material.
Insulator Hardware
Insulator hardware for Poleline Hardware refers to the components used to support and insulate electrical conductors on utility poles. Some common insulator hardware used in poleline installations include:
1. Insulators: Insulators are typically made of porcelain, glass, or polymer materials and are used to prevent electrical current from flowing through the pole or other grounded structures. They provide electrical insulation and mechanical support for the conductors.
2. Insulator pins: Insulator pins are used to secure the insulators to the crossarms or other supporting structures. They are usually made of steel or other durable materials and come in various designs to accommodate different types of insulators.
3. Insulator Clevis: Insulator clevis are comprised of multiple insulators connected in series to provide the required electrical insulation for the voltage carried by the conductors. The number and arrangement of insulators in a string depend on the system voltage and other factors.
4. Suspension hardware: Suspension hardware includes various components such as suspension clamps, suspension insulators, and suspension links. These are used to support the weight of the conductors and insulators, ensuring proper tension and alignment.
5. Strain hardware: Strain hardware is used to absorb and distribute the mechanical forces exerted on the conductors due to wind, ice, or other external factors. It includes components such as strain insulators, strain clamps, and dead-end fittings.
6. Crossarm braces: Crossarm braces are used to provide additional support and stability to the crossarms, which hold the insulator strings. They are typically made of steel or other sturdy materials and help to prevent sagging or swaying of the conductors.
Yokelink Insulator Hardware are mainly used in transmission lines. It is used to connect crossarms, thereby joining the crossarms. By joining crossarms together, they are made stronger and more resistant to vibration.They are attached in cross arms of overhead transmission lines for supporting and connecting the crossarms by means other than welding. They join two crossarms or a cross arm with an insulator mounted on it. It is also put into one crossarm for joining cross arms together.
The Insulator cross arm pins have three parts – the crossarm pin base, a crossarm pin body, and the crossarm pinhead. The cross-arm pin base is fitted in an opening of a cross arm.The cross-arm pin body connects the cross arm with another cross arm or a crossarm insulator. The crossarm pinhead is placed on the top end of the cross-arm pin body and holds it into position so that it cannot move outwards.
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