Welcome to our websites!

Standards for regular inspection of marine airbags

1. Strictly control the application pressure, and shall not exceed the application pressure

2. There should be no sharp and outstanding hard objects on the surface of the airbag to prevent piercing the airbag skin

3. Try to prevent distortion in the length of the airbag

4. After the airbag is inflated, the impact load should be prevented. For example, when the lifting airbag has lifted most of the hull after the airbag is inflated, remove most of the piers and fill in the roll airbags. If it is compressed, the internal pressure between the airbags should be adjusted to make the ship tilt to remove the piers instead of manual piers, otherwise the weight of the ship may impact the filled airbags. Another example is the collision of various factors with other objects in the process of moving the ship, and the impact airbag will be damaged when it is severe.

5. It is not necessary for a long time or before re-use in the future. The inflation pressure can be the same as the factory test pressure value. During the experiment, the inspector should stay away from the airbag 3m. If the airbag repaired after a large area is damaged, it should be lowered. Use pressure. All commonly used airbags should be inspected once a year.

6. Do not delay the air bag on the ground.

Reasons for damage to rubber marine fenders:

The main reason for the cracking of the rubber marine fender is that the kinetic energy of the ship hitting the fender is too large, which exceeds the load that the rubber marine fender can withstand. The reason for the excessive kinetic energy of the ship’s impact is the excessive speed and angle of the ship.

When the angle of berthing is large, the bow of the ship contacts the pier and the rubber marine fender before the middle of the hull, causing strong impact kinetic energy to be concentrated on one or several fenders, resulting in damage to the rubber marine fender.

One situation generally occurs in fixed V-type and D-type fenders. Fenders are mainly damaged by corners, cracks, and surface scratches. The main reason for this damage is that the friction between the rubber ship fender and the ship is too large. When the ship arrives at a higher tangential speed, the contact part of the rubber fender and the hull is forced to move forward with the ship due to excessive friction, causing the fender to be damaged by shearing.

In addition, during mooring operations, the ship sometimes needs to move forward and backward, and the ship shakes left and right or up and down caused by waves and currents. In this case, when the friction coefficient between the ship and the rubber ship fender is larger than 0.4 (such as the mooring rope is too tight), it may cause damage to the fender.

Post time: May-28-2021