简体中文
ENGLISH
Français
русский язык 
Español
한국어.
العربية 
How to correctly determine the unqualified sleeve and the solution
Provider： Source：Baoding Jindi Machinery Co., Ltd Time：2019-04-11
Usually, the steel connecting sleeve is usually rusted after being placed outdoors for one night. When the customer wants to take the product for sampling, the product will be replaced due to rusting of the product.
In fact, whether the goods are affected or not depends on the color of the rust. There are three kinds of rusting. If the yellow rust is mostly rainy, the performance of the product will be greatly affected by the rain, especially the adhesion of the steel; red rust is normal carbon. The oxidation phenomenon has little effect on the performance of the product; if black rust occurs, the quality of the product is seriously unqualified and cannot be used normally.
There are also several common unqualified steel connecting sleeves. These unqualified steel connecting sleeves not only bring a lot of trouble to the construction, but also have no guarantee for the quality of the project.
(1) There is a crack.
(2) The length and outer diameter dimensions do not meet the design requirements.
(3) The stop gauge passes through the thread diameter.
(4) The screw thread gauge of the end stop is more than 3P (P is the pitch).
(5) The threaded plug gauge of the through end cannot be screwed into both ends of the connecting sleeve and reach the screwing length.
The above phenomenon is based on the summary of the technical personnel of Baoding Jindi Machinery Co., Ltd., mainly due to the following two points:
First, the material of the sleeve is not suitable, and cracks appear after processing;
Second, the processing machinery is not well maintained, and there are large tolerances.
In this regard, it is hoped that the construction and quality control units will follow the following prevention and control measures: they must have a certificate of conformity when entering the site, and should be properly protected during transportation and storage to avoid rain, contamination, and mechanical damage. [Rebar connection sleeve]
In fact, whether the goods are affected or not depends on the color of the rust. There are three kinds of rusting. If the yellow rust is mostly rainy, the performance of the product will be greatly affected by the rain, especially the adhesion of the steel; red rust is normal carbon. The oxidation phenomenon has little effect on the performance of the product; if black rust occurs, the quality of the product is seriously unqualified and cannot be used normally.
There are also several common unqualified steel connecting sleeves. These unqualified steel connecting sleeves not only bring a lot of trouble to the construction, but also have no guarantee for the quality of the project.
(1) There is a crack.
(2) The length and outer diameter dimensions do not meet the design requirements.
(3) The stop gauge passes through the thread diameter.
(4) The screw thread gauge of the end stop is more than 3P (P is the pitch).
(5) The threaded plug gauge of the through end cannot be screwed into both ends of the connecting sleeve and reach the screwing length.
The above phenomenon is based on the summary of the technical personnel of Baoding Jindi Machinery Co., Ltd., mainly due to the following two points:
First, the material of the sleeve is not suitable, and cracks appear after processing;
Second, the processing machinery is not well maintained, and there are large tolerances.
In this regard, it is hoped that the construction and quality control units will follow the following prevention and control measures: they must have a certificate of conformity when entering the site, and should be properly protected during transportation and storage to avoid rain, contamination, and mechanical damage. [Rebar connection sleeve]
Next：Brief analysis of steel connecting sleeve process
Previous：Straight threaded sleeve connection wire inspection standard
category: Product knowledge
Previous：Straight threaded sleeve connection wire inspection standard
category: Product knowledge