Heat shrink tubing is an important material for the insulation and protection of wires. However, the specifications of wires and heat shrink tubes are named in different ways. The specifications of heat shrink tubes are named by diameter (mm), but the wires are named by square (mm²) cross-sectional area. . Therefore, there is an information gap between the two. You cannot directly select the corresponding heat shrink tube according to the specifications of the wire. For example, it is definitely not possible to directly use a Φ4mm heat shrink tube for a 4mm² wire. This requires a thorough inspection of the wire and the heat shrink tube. Matching, heat shrinkable tube manufacturer DUWAI often encounters customers asking what size of heat shrinkable tube should be used for wires of 1-400 square meters, so today we will quickly let you know what size of heat shrinkable tube should be used for wires of 1-400 square meters.

    The specification of the wire is mm² cross-sectional area, and the specification of the heat shrink tube is mm diameter. In fact, there is a corresponding relationship between the two. The area of a circle = 3.14*radius², so this formula can be used to calculate the size of the heat shrink tube corresponding to the size of the wire. There is also a very simple method. Use the following data to correspond and directly select the heat shrink tube of the corresponding specifications according to the square of the wire. The data corresponding to the specifications of national standard wires and heat shrink tubes are obtained through more than 10 years of practical application experience, which avoids the worry of selecting heat shrink tubes that are too small or too large to use.

    There is also a simpler and more direct method, which is to use a vernier caliper to check the outer diameter of the wire and directly select the heat shrink tube of the corresponding diameter. This is also a relatively accurate method.

    When selecting a heat shrink tube, be sure to leave about 20% of the hole diameter margin. If a product with an outer diameter of 4mm directly selects a Φ4mm heat shrink tube, if there is a slight tolerance on the workpiece, it will be tighter during the casing. You can There may be situations where the casing cannot be inserted. Therefore, we usually choose a larger specification. If we choose Φ5mm, this situation will not occur. We can also directly contact the heat shrink tube manufacturer DUWAI to provide you with various solutions for free.