As a user or buyer, when browsing the website, you will find a lot of suppliers and agents of corrugated tubes.  But, how to choose a qualified and suitable spec.?

Following steps will help you to find out the suitable tubes.

1. Ensure the quality and specifications meet your needs.
2. Check the product specification through the supplier's website.
3. Are there any international certifications, such as UL, CSA or third-party testing reports (RoHS, REACH, etc.) to ensure that the products are environmentally friendly?
4. Quality testing equipments, production traceability records, and quality control procedures are also key points to check if this supplier is qualified.

Good Gi Co., Ltd is a professional company of manufacturing tubes and selling products to many countries. We believe that we can meet the needs of customers and provide with the suitable products, customized services for customers.

Applications of Corrugated tube

Different materials bring different applications. Plastic and Metal are main materials for Corrugated tubes.   More information below:  

PP Corrugated Tube-

Material: Polypropylene

Good elasticity, good ductility, good flexibility, flame retardant, insulation, widely used in automobile, outdoor wiring harnesses, protecting wires and cables from external damages. When the number of wiring harnesses is large and messy, using corrugated tube will be a good way of wire management.

If using it in the interior of vehicles, FMVSS302 certification is necessary to ensure the PP corrugated tube is flame retardant.

Besides RoHS, REACH, FMVSS302 and other certifications, Japanese vehicle manufacturers also require the PP corrugated tubes with heat resistance, oil resistance, cold resistance and qualified elongation rate, deformation rate, etc.

PA Corrugated tube-

Material:  Nylon 6 (Polyamide)

Good elasticity, higher hardness than PP corrugated tube, glossy surface, impact resistance, not easy to deform and break, wear resistance, fire and flame retardant, oil resistance, acid and alkali resistance, good recovery and other characteristics.

Widely used in automotive wiring harnesses, power equipment, automation equipment, motors and other fields to protect wires from external damages.

If using it in high-end automation equipment, the tube will be required to comply with UL1696 UL Standard for Safety Mechanical Protection Tubing (MPT) certification.

HDPE Corrugated tube

Material:  Polyvinylchloride

Due to its low cost, it is widely used in construction, decoration and other cable protection. Compared with PP and PA materials, it is softer with good bending. And It is less space-restricted and light in weight. Also, it is also used in wiring on the ceiling.

However, if comparing the long-term temperature resistance, the performance of PP&PA is better than HDPE corrugated tube. And HDPE corrugated tube is not flame retardant. Therefore, it’s not suitable to use in automotive, industrial, and electronic products.

Galvanized metal Corrugated tube-

Material:  Galvanized Steel

It is soft and resistant to bending, the interior is smooth and it is easier to pass the wire, and it is resistant to high temperature, corrosion and pressure. It is used for wire and cable protection in indoor and outdoor environments such as automobile industry, automation equipment, machinery, engineering equipment, aviation railway track equipment, ships, chemical industry, communication systems, etc.

If waterproofing is required, there is another waterproof metal corrugated tube can be chosen. The difference is that the exterior of the waterproof type is covered with a layer of PVC, so that liquid and gas will not penetrate.

How to choose the specifications of corrugated tube?

First of all, the material depends on the environmental situation.

• If considering the pressure resistance, you can use PA nylon corrugated tube.
• If needing for EMI shielding, you can consider metal corrugated tube.
• If concerning the cost, you can choose PP corrugated tube.

After the material is determined, you can start to select the suitable size.

Let's take PP corrugated tube for example:

In the above picture, ΦA is the inner diameter of the corrugated tube, which corresponds to the outer diameter of the cable to be sheathed.  So, a corrugated tube with an inner diameter of Φ5 can be selected for a wire harness with outer diameter of Φ3.

ΦB in the above figure refers to the outer diameter of the corrugated tube, which is used to confirm whether it will interfere with the mechanism.  And if it is to be assembled with the corrugated tube fitting, it is necessary to notice whether the outer diameter meets the specifications.

In addition, most of the car wire harness are very long and difficult to pass through, or the connectors or terminals have been assembled, and the outer diameter of the connector is too large to pass through the corrugated tube.

To solve this problem, you can choose a split corrugated tube and the wire harness can be directly inserted into the corrugated tube.

We, Good Gi Co., Ltd, are very pleasure to provide you with samples if you’re willing to use our tubes on your products. Please contact us if you have any concerns.