Quality inspection of seamless steel pipes

by Chase Liu on Jul 12, 2022 Finance 417 Views

When seamless steel pipes are put into use, quality inspection is often required to judge whether they are qualified or not.

1. Chemical composition analysis. Instrumental analysis and chemical analysis can be used. The samples used for chemical analysis are divided into smelting samples, ingot cuttings samples, and pipe samples. The smelting sample generally adopts the instrumental analysis method, and the finished pipe sample adopts the chemical analysis method and the co-analysis method.

2. Size and shape detection. The inspection contents mainly include wall thickness, outer diameter, length, curvature, ovality, port slope, obtuse angle and cross-sectional shape of special-shaped steel pipe.

3. Surface quality inspection. There are many non-destructive testing methods for manual visual inspection and non-destructive testing, such as ultrasonic testing, eddy current testing, magnetic particle testing, magnetic flux leakage testing, electromagnetic ultrasonic testing and penetrant testing.

①Ultrasonic flaw detection: a non-destructive testing method for inspecting the internal defects of materials by using the influence of the acoustic performance differences of materials and their internal defects on the propagation of ultrasonic waves, which is represented by the symbol UT.

② Eddy current flaw detection: a flaw detection method for detecting surface and near-surface defects of steel pipes using the principle of electromagnetic induction, represented by the symbol ET.

③ Magnetic flux leakage detection: magnetize the surface of the steel pipe, pick up the leakage magnetic field of the defect, form a defect electrical signal, and achieve a non-destructive inspection method for finding defects, which is represented by the symbol LT.

④ Magnetic particle inspection: a kind of magnetic leakage inspection, which is a non-destructive inspection method using the phenomenon that the leakage magnetic field attracts magnetic particles in a strong magnetic field, the surface defects of ferromagnetic materials are generated, and it is represented by the symbol MT.

⑤ Radiographic inspection: The inspection method that uses rays to penetrate the object to find the internal defects of the object, which is represented by the symbol RT.

⑥Colored flaw detection: An inspection method of penetrant flaw detection (pt), which incorporates penetrating agents containing colored dyes (such as red dyes) into tiny cracks on the surface of the workpiece.After cleaning, apply adsorbent to make the colored oil in the defect penetrate to the surface, and find and judge the defect according to the colored spots and stripes.

4. Chemical property testing. Mechanical property test, hydraulic test and corrosion test at room temperature or a certain temperature.

5. Process performance test. Including flattening test, ring pull test, flaring and crimping test, bending test.

6. Metallographic analysis. Including low and high magnification examinations.

7. Thread parameter detection of special oil pipes. Including coupling pattern detection, pipe thread detection and detection after the pipe body and coupling are tightened.

Article source: https://article-realm.com/article/Finance/24704-Quality-inspection-of-seamless-steel-pipes.html

Pictures

Comments

No comments have been left here yet. Be the first who will do it.
Safety

captchaPlease input letters you see on the image.
Click on image to redraw.

Reviews

Guest

Overall Rating:

Most Viewed Articles

Statistics

Members
Members: 16680
Publishing
Articles: 78,280
Categories: 202
Online
Active Users: 221
Members: 0
Guests: 221
Bots: 6439
Visits last 24h (live): 1324
Visits last 24h (bots): 42271

Latest Comments

I recently came across your blog and have been reading along. I thought I would leave my first comment. I don't know what to say except that I have enjoyed reading. Nice blog, I will keep visiting...
I genuinely like you're making style, inconceivable information, thankyou for posting 텐바이텐  
You have a good point here!I totally agree with what you have said!!Thanks for sharing your views...hope more people will read this article!!  트랜드 도메인 주소    
Logging into your Chime account is a quick and secure process designed for instant financial access. To begin, visit the official Chime website or open the mobile app on your device. Navigate to...
on Jul 13, 2026 about Blogging
This is my first time visit to your blog and I am very interested in the articles that you serve. Provide enough knowledge for me. Thank you for sharing useful and don't forget, keep sharing...
This is my first time visit to your blog and I am very interested in the articles that you serve. Provide enough knowledge for me. Thank you for sharing useful and don't forget, keep sharing...
The sophisticated online platform for Escorts Gurgaon features intuitive filtering options that allow potential clients to narrow their search based on specific preferences and availability.  
 I particularly appreciate the emphasis on market research and prototypes. It reminds me that a well-defined product and a clear understanding of its market are crucial. Even a small invention can...
on Jul 13, 2026 about How to Start an Invention Idea
Envision a night when everything you need is provided for you without your asking a thing. Our Call Girl Rajendra Place , offer that intuitive service, and you would be well taken care of and...
Even after many failed attempts, I never felt discouraged because the energetic soundtrack and creative character designs in FNF always encouraged me to try another round.

Translate To: