The inspection standards for small-diameter seamless steel tubes are an important basis for ensuring the quality and safety of steel pipes. The following is a detailed elaboration on the inspection standards for small-diameter seamless steel tubes:
1. Appearance quality inspection
The appearance quality of small-diameter seamless steel tubes is the primary inspection criterion. The surface of the steel pipe should be smooth and free of cracks, folds, tooth marks and other defects. It should also be free of scale and pungent odor. The ends of steel pipes should be cut straight, and there should be no defects such as cracks, scars, ovals, etc. on the surface, or defects that would cause pitting damage during use. These visual quality inspections are to ensure that the steel pipe can withstand pressure during use, resist corrosion, and have a long service life.
2. Dimensional deviation inspection
The dimensional deviation of small-diameter seamless steel tubes is also one of the important inspection standards. The outer diameter, inner diameter and wall thickness of the steel pipe should meet the design requirements, and the deviation value should be within the specified range. Generally speaking, the outer diameter deviation generally does not exceed plus or minus 0.2mm, the inner diameter deviation generally does not exceed plus or minus 0.1mm, and the allowable wall thickness deviation generally does not exceed plus or minus 12.5%. The inspection of these dimensional deviations is to ensure that the steel pipe can meet the engineering requirements during use and ensure the normal operation of the pipeline system.
3. Mechanical performance inspection
The mechanical properties of small diameter seamless steel tubes are a key part of the inspection standards. Mechanical properties include tensile strength, yield strength, elongation and other indicators. The tensile strength should meet the design requirements, the yield strength should not be less than a certain proportion of the tensile strength, and the elongation should not be less than a certain percentage. These mechanical property tests are to ensure that steel pipes can withstand and resist damage when subjected to external forces, ensuring the safety and stability of the pipeline system.
4. Chemical composition analysis
The chemical composition of small-diameter seamless steel tubes is also an important part of the inspection standards. The chemical composition of the steel pipe should meet the design requirements, including carbon (C), silicon (Si), manganese (Mn), sulfur (S), phosphorus (P), chromium (Cr), nickel (Ni), copper (Cu), etc. The content of elements. The analysis of chemical composition is to ensure that the material of the steel pipe meets the engineering requirements and has sufficient corrosion resistance and mechanical properties.
To sum up, the inspection standards for small-diameter seamless steel tubes cover many aspects such as appearance quality, dimensional deviation, mechanical properties and chemical composition. The implementation of these inspection standards is to ensure the quality and safety of steel pipes, and to ensure the normal operation and service life of the pipeline system. Therefore, when purchasing and using small-diameter seamless steel tubes, inspection and acceptance should be strictly carried out in accordance with relevant standards and specifications to ensure the quality and safety of the steel tubes.
Permanent Steel Manufacturing Co.,Ltd is a well-known Carbon Steel Seamless Pipe manufacturer and exporter, known for its precision engineering, light weight, corrosion resistance, reasonable structure, complex details, and economy. We have set an example in terms of quality and performance by manufacturing and supplying CS seamless pipes. For any request, please contact us: sales@permanentsteel.com
Read more: Schedule 40 Carbon Steel Pipe
