How to judge the quality of lean pipe connectors?

The quality judgment of lean pipe connectors needs to be comprehensively evaluated from multiple aspects such as material, structure, performance, and compliance with standards. The specific points are as follows:

1、 Material and process requirements
Pipe characteristics: Lean pipes are usually galvanized steel pipes coated with PE resin, with a standard diameter of 28mm and a wall thickness of 0.8-1.5mm. The uniformity of the coating and plastic adhesion need to be checked.
Material of connector: If it is a metal connector (such as stainless steel), it must comply with the 201, 304 or 316 material standards and meet the forging process requirements.
2、 Structural Design and Functionality
Connection method: It should support quick disassembly and stable structure. For example, threaded joints should comply with T/CNHA 1018-2019 standard to ensure sealing and compression resistance.
Adaptability: The connectors should match the specifications of the lean pipe and support flexible adjustment, such as elbows, tees, etc., which need to meet the requirements of angle and dimensional tolerances.
3、 Performance testing standards
Mechanical properties: Verify the tensile strength through tensile testing, referring to the Grade I joint standard in JGJ107-2016 "Technical Specification for Mechanical Connections of Steel Bars" (if similar mechanical connections are involved).
Process inspection: Verify construction records to ensure that tightening torque and other parameters comply with specifications, and avoid loosening or leakage caused by process defects.
4、 Appearance and Compliance
Appearance inspection: The connectors should be free of deformation, cracks, or rust, and the surface of the sleeve should be neat and undamaged.
Standard compliance: Quality certification documents must be provided and comply with industry standards (such as JG/T 163-2013) or group standards (such as T/CNHA 1018-2019).
5、 Quality control recommendations
Process management: Avoid relying solely on post inspection and strengthen process control in the production process.
Sampling inspection: Conduct random sampling inspection according to the acceptance batch (such as every 500 pieces as a batch) to ensure batch consistency.
Through the multidimensional evaluation above, the quality and reliability of lean pipe connectors can be systematically judged.