How to distinguish the quality of water stop screws?

In the construction, we often use the water stop screw to tighten the fixed screw, and the screw often breaks for various reasons, which makes the company's engineering losses huge. There is a good way to tell how to choose the water stop screw, whether to go to the testing center or trust others. Firstly, the models and specifications of water stop screws are briefly introduced. According to the different diameters of steel bars, they are usually divided into M 12, M 14, M 16, M 18 and so on. According to raw materials, there are Q235 round steel, Q 195 scrap steel and rolled steel. The models of water stop screws are three-stage water stop screws, threaded water stop screws and double-headed water stop screws.

On the basis of pulling the screw through the wall, the screw is welded with three pieces, with a water piece in the middle. To stop water, it must be fully welded without water leakage, and both ends are supported by positioning pieces, not cement. The double-headed water stop screw only has threads at both ends of the steel bar, and the rest are round steel, and the main pulling force is on the straight-through threaded water stop screw.

Three-stage water stop screws are divided into several models, including three-stage sleeve type, cone type and hollow tube water stop screws. The three-stage water stop screw consists of three parts, and the middle part of the inner rod is a welded water stop piece with thick wall. The outer rod is a coarse thread fixing nut for reinforcing the formwork, and it is also a connecting nut and different types of connecting nuts.

How to distinguish the quality of water stop screws? The simplest way to stop the water screw is to bend the screw, which is a very easy and simple method to distinguish. If it is round steel, it can be bent at least 90 degrees. But ordinary steel rolling or scrap is easy to break.