We Super Steel Manufacturing Co.,Ltd(SMC) are amongst the top manufacturers and suppliers for the seamless steel pipe, welded steel pipe, OCTG products and fittings from China. We have been manufacturing and supplying these products to the industry since 1993, and received repeat orders and appreciation from our valued customers.
High quality piping products from approved manufacturers.
In order to continuously improve our offerings to our clients, we have consistently improved and upgraded our manufacturing facility and can hence offer material with stringent requirements.
Over the years, Super Steel Manufacturing Co.,Ltd(SMC) has developed an enviable reputation for project management for the Oil & Gas, Construction, Power Energy, Marine & Offshore, Water Treatment, Exploration & Drilling Services, Pipeline & Petrochemical and other heavy industries.
The many years of experience that we have means that there is always someone who has the ability to carry a project forward.
Always up to date. In this column you can find the steel pipe related articles, including industry trends, product standards and materials, and some technical guidelines.
When selecting surface NDT methods for straight seam steel pipes, it is important to choose the appropriate technique based on the material properties.
Magnetic particle testing is ideal for ferromagnetic steel (magnetic iron pipes).
Penetrant testing is suitable for non-ferromagnetic steels.
Additionally, the timing of surface NDT is influenced by the characteristics of the welded joints:
For delayed cracking tendencies in welded joints, surface testing should be performed after a certain cooling period following welding.
For reheat cracking tendencies, surface testing should be conducted after both post-weld heat treatment and cooling.
Applications of Surface Non-Destructive Testing Based on Standards:
- Outer Surface Material Inspection:
To detect any surface defects on the outer surface of the pipe material.
- Detection of Defects in Important Butt Welds:
To identify potential defects in critical butt welds, which are essential for the pipe's structural integrity.
- Detection of Defects in Important Fillet Welds:
To examine fillet welds in crucial areas where the pipe's performance is critical.
- Detection of Defects in Important Socket Welds and Jumper Tee Branch Pipes:
Ensuring the quality and integrity of socket welds and branch pipe connections.
- Bending Surface Defect Detection:
To assess potential defects in the pipe's surface that could result from bending during fabrication or installation.
- Detection of Large Groove Welds in Materials Prone to Quenching:
Large groove welds in materials that may undergo quenching need careful examination for any potential surface defects.
- Detection of Surface Defects in Materials Below Zero Design Temperature or Non-Austenitic Stainless Steel Pipes:
For materials operating at low temperatures or when beveling non-austenitic stainless steel pipes, special attention is required, especially at temperatures below -29°C.
- Double-Sided Weldment Gouging Detection:
Non-destructive testing should be performed after weld gouging to ensure the integrity of double-sided welds.
- Defect Detection in Alloy-Hardened Areas After Oxyacetylene Flame Cutting and Grinding:
When using oxyacetylene flame cutting for welded pipes, areas prone to alloy hardening and grinding need thorough inspection for any surface defects.
By adhering to these principles and applying the appropriate NDT methods, the structural integrity of straight seam steel pipes can be maintained, ensuring their reliability in various industrial applications.
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