Author:Site Editor Publish Time: 2020-11-06 Origin:Site
There are a dazzling array of brands of hose clamps on the market. In the face of many of the same products, how should we choose, how to compare, and what details should we pay attention to? Next, we will teach you how to compare the quality of hose clamps in terms of product technology, workmanship, and materials.
How to compare the quality of the same type of hose clamp. First of all, from the appearance, the surface of the hose clamp is smooth and clean without spots, without depressions and bumps. The color gloss is good. The surface coating of such a hose clamp is uniform and has no cracks and is not prone to corrosion.
Whether the above accessories are of good workmanship and whether the welding points are firm, generally no less than three welding points are required. Whether it is easy to hide dirt , and whether it is easy to clean the accumulated ash layer in the future.
Whether the side of the hose band is crimped or polished smoothly, if it is rough, it is easy to cut the hose and cause leakage.
Measure the thickness and width of the hose band, because the length of different types of hose bands is different, and the shape of the round hose band is not easy to calculate and measure. You can use a micrometer to measure the bandwidth and thickness of the hose clamp for comparison.
You can use a screwdriver to turn the nut. Check whether there is any jamming, whether the nut will be unable to bite the thread due to repeated use and cause the thread to wear and the thread connection cannot be tightened.
Can pass the water test. Carbon steel and low-alloy steel will cause rust spots when immersed in water for a period of time. Stainless steel does not.
The grade of stainless steel can be measured in many ways, such as by color. Austenitic such as 304 stainless steel has a yellowish tint, and ferrite 430 has a blue tint. There are many determinants of this color, and the accuracy is not high. Moreover, such a judgment method requires long-term exposure to these things and "trained" eyes. Therefore, in comparison, passing the magnet test is relatively accurate.
Iron-nickel-cobalt-gadolinium is the only magnetic metal. The grade of stainless steel alloy is closely related to the iron content. The stainless steel grade of the hose clamp can be compared by the strength of the magnet attracting the stainless steel. For example, martensite 430 is magnetic, while general austenitic 304 stainless steel is not magnetic. 304 belongs to the metastable state of stainless steel. After annealing, it belongs to a single austenitic structure without magnetism. However, after cold working deformation, some of the austenite structure changes will be micro-magnetic, especially the corner part, the deformation is more intense, and the magnetism is also more obvious.
If accurate data is required, professional testing tools should be used for testing, such as hardness test, salt spray test, etc. When purchasing, you can request the supplier to provide a test report to determine the quality of the product.