How to distinguish between irradiated cross-linked cables and silane cross-linked cables?
First, the product name identification method
Wire--irradiated cross-linked low-smoke halogen-free flame-retardant polyethylene insulated wire and cable; cable--radiation cross-linked low-smoke non-halogen flame-retardant polyethylene insulated low-smoke halogen-free flame-retardant polyethylene sheathed power cable. Imitations will have a slightly different name in general, such as irradiation cross-linked polyethylene insulated low-smoke halogen-free sheathed flame-retardant power cables and so on.
Second, hot water soaking
If the core or cable is immersed in hot water at 90°C, the insulation resistance will not drop rapidly and stay above 0.1MΩ/Km under normal conditions. If the insulation resistance drops sharply or even below 0.009MΩ/Km, it means that it has not been treated with an appropriate irradiation cross-linking process.
Third, the epidermis burning method
The insulation layer should not be significantly sunken by using a soldering iron. If there is a large depression, there is a defect in the material or process used for the insulation layer. Under normal circumstances it should be difficult to ignite, after a long time of burning the insulating layer of the cable is still relatively complete, there is no smoke and pungent odor, while the diameter has increased. If it is easy to ignite, it can be determined that the insulating layer of the cable is not using a low-smoke halogen-free material. If there is a large amount of smoke, it means that the insulating layer uses a halogen-containing material. If the insulation surface is severely detached after a long period of combustion and the diameter does not increase significantly, it means that the proper irradiation cross-linking process has not been performed.
Fourth, the density contrast method
Low-smoke halogen-free materials have a higher density than water and can be stripped of some insulating layers into water. If they float above the water, it is definitely not a low-smoke, halogen-free material.
Suspension Mechanism
Parapet Clamp VS Suspension Mechanism:
The Shenxi Parapet Wall anchor was designed to be used on flat roofs that are surrounded by a parapet wall.
On buildings with parapets, the parapet clampis the ideal solution, as it is not only easy to install, saves labor costs, but also has no roof space restrictions on the installation of standard suspension mechanism with counter weights, very popular in Singapore, Chile and Peru market.
Roof Mechanism of Suspended Platform mainly has two types: Suspension mechanism and Parapet wall anchor.
1. Suspension Mechanism
Suspension mechanism is installed on the top of the building and it is easy to install. The height and the overhang of the job can be adjusted to adapt to different kinds of building facades and roof structures. Projecting length ranges from 1.3m to 1.7m. The suspension mechanism can be designed and made according to specific conditions that customers may need.
2. Parapet Wall Anchor
Parapet clamper (a kind of suspension mechanism) is suited for constructions with parapet wall of sufficient strength and adequate height. It is consisted with front base, rear base, clamping unit and so on. Working wire rope and safety wire rope are fixed to the rear base, and hung through the suspension ends of the front bases. As installation, put the suspension mechanism across the parapet wall, and adapt the rear base to the wall of certain thickness. (Notice: before using of such suspension mechanism, you must check whether the strength of parapet wall can afford the load distributed on it by the suspension mechanism.)
Suspension Mechanism,Galvanized Suspension Mechanism,Painted Suspension Mechanism,Moveable Suspension Mechanism
Shenxi Machinery , https://www.cn-shenxi.com
