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Rebar Coupler Inspection Tool: Thread Ring Gauge

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The   thread ring gauge   is a tool used to measure the accuracy of external thread dimensions. There are two types of thread angle options available for the gauge, which are 75 degrees and 60 degrees, depending on the couplers used at construction. Please make sure to specify the thread angle and pitch you need before purchasing. The thread ring gauge is used to inspect whether the external thread dimensions of the workpiece are qualified. Each specification of the thread ring gauge is divided into two types: Go gauge and No-go gauge, which can be purchased separately or together. During the inspection process, only when the Go gauge can fully engage with the external thread of the workpiece, and the No-go gauge can only partially engage with the external thread and the engagement does not exceed two pitches, can the external thread be determined as qualified. Otherwise, it can be judged that the external thread dimensions are not qualified. The thread ring gauge is used to inspect t
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What should I do if the Cold Extrusion Sleeve is Cracked

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If you encounter a cracked   cold extrusion sleeve , there are a few steps you can take to address the issue: Inspect the extent of the crack: Determine the size and location of the crack to assess the severity of the damage. This will help you plan the appropriate course of action. Replace the damaged sleeve: If the crack is significant and compromises the functionality of the sleeve, it is recommended to replace it entirely. Consult the manufacturer’s guidelines or seek professional assistance to ensure you select the correct replacement sleeve. Weld the crack: In some cases, if the crack is small and doesn’t affect the overall performance, it may be possible to repair it through welding. However, welding should only be done by experienced professionals to ensure the integrity of the sleeve is maintained. Prevent future cracks: To avoid encountering similar issues in the future, it is important to identify the cause of the crack. Factors such as excessive pressure, improper handling,
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Performance Requirements of Grouting Rebar Coupler

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Performance requirements of   grouting rebar coupler   are as follows: 1. Vertical rebar connections at the joints of prefabricated columns and prefabricated shear walls. Semi-grouting rebar coupler or fully grouted rebar coupler can be used. 2. Vertical rebar connections at the joints after pouring the lower part of the prefabricated overlay beam. Fully grouted rebar coupler should be used. Since the rebar couplers of prefabricated components must be arranged at the same section, it is clearly stipulated in the “Technical Specification for Assembled Concrete Structures” JGJ1-2014 that the longitudinal rebar connections using sleeve grouting should meet the performance requirements of Grade I joints in the current national industry standard “Technical Specification for Mechanical Connections of Reinforcement Bars” JGJ107. Whether the joints meet the performance requirements of Grade I joints is determined by the joint type test specified in JGJ107. The content includes three tests: uni
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The Importance of Mechanical Connection in Structural Stability

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In the field of construction and engineering, ensuring structural stability is of paramount importance. One crucial aspect of achieving this is through the implementation of reliable and efficient   mechanical connections . In this blog post, we will explore the significance of mechanical connection, specifically focusing on the application of mechanical couplers. What is a Mechanical Connection? A mechanical connection refers to the joining of two or more structural elements using mechanical means. This method significantly enhances the load-bearing capacity and overall stability of the structure. A well-designed mechanical connection ensures a secure and rigid coupling, reducing the risk of structural failure. The Role of Mechanical Couplers: Mechanical couplers are an essential component of mechanical connections. These devices are specifically engineered to provide a strong and durable joint between reinforcing bars or steel components. By using mechanical couplers, the need for ti
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Installation of Steel Reinforcement Coupling Sleeves and Washers

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In China, the technology of steel frame structure   coupling sleeves   has made rapid progress through the introduction of professional techniques and the diligent efforts of research institutions’ experts. The development of this technology has gone through several stages, such as hot forging of the sleeve specifications, tapered external threads, upsetting and extrusion forming. With the continuous improvement of the technology, the cost of sleeves also been reduced. Following we will discuss how to install steel reinforcement coupling sleeves and the key points to note. Installation of steel reinforcement coupling sleeves and washers: 1. According to the provisions of the seismic design level, coupling sleeves washer should avoid installing the coupling heads in the end regions of the structure and the regions with increased reinforcement density at column ends. If it is necessary to install in locations with high internal stress, the percentage of Level 3 coupling heads within the
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Characteristics of Upsetting Forged Rebar Coupler

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Characteristics of   upsetting forged rebar coupler : 1. It has a strong connection with the rebar, meeting the highest grade (Grade I) requirements of the current industry standard “Technical Specification for Mechanical Connection of Reinforcing Bars” (JGJ 107-2016). 2. Fast construction speed, convenient inspection, reliable quality, and no protentional quality problems in engineering. 3. It not require to electricity during connection, and won't affected by weather conditions, and can be operated in wind, snow, rain, underwater, and flammable gas. 4. Simple operation, both rebar upsetting and threading equipment are easy and convenient to operate. Workers can master and produce qualified joints with short-term training. 5. Rebar threading processing can be carried out on-site or in precast factories, without any pollution to the site. 6. Lower requirements for rebar, joints that meet Grade I performance requirements can be processed for rebar with poor welding performance or la
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How to Make the Template for Rebar Coupler Connection

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How to make the template for   rebar coupler   connection? Procedure standard: 1. Rebar cutting should be done with a non-toothed saw for a straight and even end section. 2. The rebar coupler should be qualified, with well-shaped threads and no defects such as broken or bald threads. After the thread processing is completed, fitted with a protective cover. 3. The coupler be installed by a torque wrench to ensure the tightening torque value meets the specifications. 4. Each connection should be inspected individually and marked with paint if it passes the inspection. Quality standard: 1. The end of the rebar should be perpendicular to the axis and should not have a horseshoe or curved shape. 2. The tightening torque value of the torque wrench should meet the specifications or design requirements, with an accuracy of ±15% for the torque wrench. 3. After the connection, there should not be more than one full thread exposed on each end. 4. The ribs of two interconnected rebars should be in
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