Inspection standards for pipe flanges

Pipe flange is a common pipe connection method, used to connect pipes, valves, instruments and other equipment, and plays a very important role in industrial production. In order to ensure the safety and reliability of flange connections, strict inspection is required. Flange inspection refers to the quality inspection of flange connectors when they are installed and used.

Flange inspection items:
1. Dimensional inspection: including inspection of dimensional parameters such as the inner diameter, outer diameter, and thickness of the flange.
2. Compatibility test: Test the compatibility of flange connection materials to ensure that there will be no corrosion or oxidation reaction between the connection parts.
3. Friction coefficient inspection: Check whether the friction coefficient between flange connectors meets the standard requirements.

4. Leak detection inspection: Check whether there is leakage in the flange connection to ensure safety and reliability.

Flange inspection standards:
1. International standards: including ISO, DIN, ANSI/ASME, JIS and other standards.
2. Industry standards: including petrochemical, electric power, steel, mining and other industry standards.
3. National standards: including GB, JB, HG and other standards.

Flange inspection method:
1. Visual inspection method: Visually inspect the flange connections for surface defects, oxidation, deformation, etc.
2. Metrological inspection method: Use measuring tools to detect various dimensions of flange connections.
3. Mechanical property testing method: including testing of mechanical properties such as tensile, impact, hardness, etc.
4. Leak detection method: Leak detection of flange connectors through various leak detection methods.

Precautions:
1. Inspection should be carried out in accordance with corresponding standards to ensure the accuracy and reliability of the inspection results.
2. The flange connectors should be cleaned before inspection to ensure that the inspection results are true and reliable.
3. For some special-purpose flange connectors, corresponding inspections should be carried out according to their uses and requirements.

Summarize:

This article provides a detailed analysis of the overview, projects, standards, methods, etc. of flange inspection, hoping to be helpful to readers. When conducting flange inspection, relevant standards and specifications should be strictly implemented to ensure the safety and reliability of flange connections.

Go here to learn more: Uses, types and standards of pipe fittings