I worked in the chemical industry for 40 years, so was drawn to a video about something I used so much. It kind of makes me happy to realize that I don't care even the least little bit about such things any more. Well done video. Thanks
I have used much smaller seamless steel tubing for various projects, and it is wonderful to work with. Now I know why it is so expensive - thanks for sharing this!
My life is complete now 😂, I always wondered how this was done. Your videos are great! So thorough and yet concise. I also love how they're not 20 minutes long. 8 minutes is very digestible.
@@AlJazariedu I didn't remember the date when this process was first introduced; but I got the manufacturing process from one of my father's hand books on semi-finished metal products. It had diagrammatic illustrations of the process. As a young boy I was thoroughly impressed by that hot piercing process.
How do they get the the final ID mandrel out. Doesn't it get stuck? He said it is lubricated, but what lubricant can survive such temperatures? Must be a special oil.
Great question! You're right to think that high temperatures would make removing the mandrel tricky. The lubricant used in these processes is specially formulated to withstand extreme heat. While standard oils would break down, high-temperature lubricants like graphite-based or molybdenum disulfide (MoS2) are often used, as they can survive the intense conditions. Thanks for asking, and I hope this answers your question!
@AlJazariedu Asked and answered. Thank you. So many sites & videos show a foreshortend cross-section that always made me wonder how long the inside mandrel is and how does it come out. I saw one TH-cam video that briefly mentioned a post process where the tube is rolled again and it is done in such a way to loosen the mandrel stuck inside. But it didn't explain any further.
Thank you for sharing your experience! Cold drawn seamless (CDS) and cold drawn welded (CDW) processes are indeed excellent alternatives, especially for applications requiring tighter tolerances and better surface finishes. Each process has its own advantages depending on the specific requirements. Feel free to share more about your use case-we’d love to hear!
6:02 Machining "does not change the dimensional tolerances", the wording here confuses me. Tolerances are a specification and do not change, only the pipe diameter can change (and always does when machined, just by the nature of the process). Did you mean even after machining the diameter remains within the specified tolerance?
@schizophrenicenthusiast Thanks for your comment! You're right-tolerances don't change as a specification. What I meant to convey is that even after machining, the diameter of the pipe remains within the specified tolerance. The machining process slightly alters the diameter, but the final dimension is still within the allowed tolerance range. I appreciate you pointing that out, and I hope this clears up any confusion!
I wonder if you mean "microstructure" or "micro-cracks" - After forming the tubes, the hardness is measured if it is as required this means that the tube has the required microstructure. - Ultraviolet magnetic particles are used to inspect the entire tube for micro-cracks and the wall thickness. Hope this helps, if you have more questions don't hesitate to get in touch with me.
@@AlJazariedu I M' GLAD IF YOU TAKE ME ADVICE BEFORE INSPECTION WORKS ABOUT SURFACE OF FINISHED PIPES, TO PUT OR PAINT. 1)THE KIND OF COMMODITY NAME FOR POWDER, REQUITE OR OIL INCLUDED Ultraviolet magnetic particles. 2)IS IT VERY REASONABLE PRICE TO COMPERE Fluorescent paint. 3)IS IT GOOD EFFECTED COMPERE TO COLOR CHECK SPRY AFTER WELDING FINISHED?
@@SHIGEOYAMAMOTO-z5x Thank you for your insightful comment! You bring up an important aspect of pipe manufacturing-surface preparation and inspection. Powder, Requite, or Oil with Ultraviolet Magnetic Particles: These are often used in MPI for detecting surface or near-surface defects. The choice between these depends on the specific requirements (e.g., oil-based mediums are better for wet inspections). Cost and Effectiveness of Fluorescent Paint: Fluorescent paint can offer high visibility during inspections, but its use depends on whether it aligns with your inspection protocols and budget. Comparison with Color Check Spray: Color-check sprays (typically used for penetrant testing) can highlight cracks after welding but may not be as effective for inspecting large areas like pipes compared to MPI. Your advice is well-taken, and we'll consider discussing these aspects in more detail in future videos. Thanks for watching and contributing to the conversation!
@@turbotoblast4 that’s incorrect. in pipe the OD matters as you have to be able to make connections. One inch pipe is 1” OD no matter what schedule. The difference is the intended use and manufacturing process.
@@AlJazariedu But not on the audio channel, please. That would make it difficult to process all the numbers. I already had to listen two times to "one-thousand-two-hundred-and-fifty-two-one-thousand-three-hundred degrees". I suggest to only give one number for such ranges.
your way in teaching is really simple and easy to understanding, thanks alot
Thanks a lot for your support
Love you posted this with NO music to mess up information flow
Thanks a lot.
You know, I am preparing another video now and thinking of adding background music, but I will not. 😀
Thanks for your advice. 👍
I can't assist videos with music , it spoils everything. A mania , it's the only explanation.
@@liegesaboya33 That is why I do not add music to my videos.
Our goal is to provide useful content, not to please maniacs.
a far better explanation than almost any metalworking video on TH-cam.
Thank you very much for your kind compliment.👍👍👍
I worked in the chemical industry for 40 years, so was drawn to a video about something I used so much.
It kind of makes me happy to realize that I don't care even the least little bit about such things any more.
Well done video. Thanks
You are welcome. It is my pleasure to make you happy.🙂🙂🙂
Thanks for no music, Great video
Thank you for your kind words! I appreciate your support and feedback!
Nice detailed explanation.
Thanks a lot
I have used much smaller seamless steel tubing for various projects, and it is wonderful to work with. Now I know why it is so expensive - thanks for sharing this!
happy to hear this from you. Of course, seamless tubes are very expensive because of their properties and way of production.
My life is complete now 😂, I always wondered how this was done. Your videos are great! So thorough and yet concise. I also love how they're not 20 minutes long. 8 minutes is very digestible.
Wait, there is a lot to know. Just follow me to watch more digestible videos.
Awesome! Thank you!
Fascinating production process! First introduced by Mannesmann Roehre in Germany.
Yes, you are right. This process First introduced by Mannesmann Roehre in Germany in 1890.
@@AlJazariedu I didn't remember the date when this process was first introduced; but I got the manufacturing process from one of my father's hand books on semi-finished metal products.
It had diagrammatic illustrations of the process.
As a young boy I was thoroughly impressed by that hot piercing process.
@@BasementEngineer
My greeting to your father. Follow my AlJazari channel I will prepare more videos about manufacturing processes.
@BasementEngineer
th-cam.com/video/pW0Yn9b1mcA/w-d-xo.html
Great video!!! 👏👏👏👏👏😍😍😍😍😍 and thank you very much for not adding music 😉😉
Thank you! 😃
Very interesting, this seems very energy-intensive!
Thanks for your comment
Thanks for making it simple with no music
I figured the steel pipes are seamless enough; no need to add music to smooth things over. 🎤😂
Very interesting, especially the commentary as it went along.👏🇨🇮
Thank you very much for your kind compliment.🙂🙂🙂
Thanks for this excellent video
I'm glad you found it helpful! 😊
Thank you! great resource :)
Glad you enjoyed it!
As others have said, yeah great video and thanks for no music
Glad you enjoyed the video - I appreciate your feedback!
Count me as another "thank you for no music" viewer. :)
You're very welcome! I figured steel pipes are seamless enough; no need to add music to smooth things over. 🎤😂
good!
thanks
i always wondered how they did that :)
Now you know.
nice!👍
Thanks
Thanks
Welcome
How do they get the the final ID mandrel out. Doesn't it get stuck? He said it is lubricated, but what lubricant can survive such temperatures? Must be a special oil.
Great question! You're right to think that high temperatures would make removing the mandrel tricky. The lubricant used in these processes is specially formulated to withstand extreme heat. While standard oils would break down, high-temperature lubricants like graphite-based or molybdenum disulfide (MoS2) are often used, as they can survive the intense conditions. Thanks for asking, and I hope this answers your question!
@AlJazariedu Asked and answered. Thank you. So many sites & videos show a foreshortend cross-section that always made me wonder how long the inside mandrel is and how does it come out. I saw one TH-cam video that briefly mentioned a post process where the tube is rolled again and it is done in such a way to loosen the mandrel stuck inside. But it didn't explain any further.
@@divermike8943 You are welcome. I appreciate your comments.
I have used seamless tube made with an alternate process - cold drawn seamless or cold drawn welded. CDS and CDW
Thank you for sharing your experience! Cold drawn seamless (CDS) and cold drawn welded (CDW) processes are indeed excellent alternatives, especially for applications requiring tighter tolerances and better surface finishes. Each process has its own advantages depending on the specific requirements. Feel free to share more about your use case-we’d love to hear!
are you planning on making a video about continuous casting process?
Yes, of course.
Thank u
You welcome
6:02 Machining "does not change the dimensional tolerances", the wording here confuses me. Tolerances are a specification and do not change, only the pipe diameter can change (and always does when machined, just by the nature of the process). Did you mean even after machining the diameter remains within the specified tolerance?
@schizophrenicenthusiast
Thanks for your comment! You're right-tolerances don't change as a specification. What I meant to convey is that even after machining, the diameter of the pipe remains within the specified tolerance. The machining process slightly alters the diameter, but the final dimension is still within the allowed tolerance range. I appreciate you pointing that out, and I hope this clears up any confusion!
@@AlJazariedu Thank you for the reply!
@@schizophrenicenthusiast You welcome
How to check micro after pipe formed ?? Which location have to sample taken for inspection...pls explain
I wonder if you mean "microstructure" or "micro-cracks"
- After forming the tubes, the hardness is measured if it is as required this means that the tube has the required microstructure.
- Ultraviolet magnetic particles are used to inspect the entire tube for micro-cracks and the wall thickness.
Hope this helps, if you have more questions don't hesitate to get in touch with me.
Micro structure how to check
Pls give ur contact details
@@senthazhalp7167 aljazariedu@gmail.com
@@AlJazariedu I M' GLAD IF YOU TAKE ME ADVICE BEFORE INSPECTION WORKS ABOUT SURFACE OF FINISHED PIPES, TO PUT OR PAINT.
1)THE KIND OF COMMODITY NAME FOR POWDER, REQUITE OR OIL INCLUDED Ultraviolet magnetic particles.
2)IS IT VERY REASONABLE PRICE TO COMPERE Fluorescent paint.
3)IS IT GOOD EFFECTED COMPERE TO COLOR CHECK SPRY AFTER WELDING FINISHED?
@@SHIGEOYAMAMOTO-z5x Thank you for your insightful comment! You bring up an important aspect of pipe manufacturing-surface preparation and inspection.
Powder, Requite, or Oil with Ultraviolet Magnetic Particles: These are often used in MPI for detecting surface or near-surface defects. The choice between these depends on the specific requirements (e.g., oil-based mediums are better for wet inspections).
Cost and Effectiveness of Fluorescent Paint: Fluorescent paint can offer high visibility during inspections, but its use depends on whether it aligns with your inspection protocols and budget.
Comparison with Color Check Spray: Color-check sprays (typically used for penetrant testing) can highlight cracks after welding but may not be as effective for inspecting large areas like pipes compared to MPI.
Your advice is well-taken, and we'll consider discussing these aspects in more detail in future videos. Thanks for watching and contributing to the conversation!
How are tubes made?
I will show it in another video.
What does, More over, mean?
"Moreover" means "Additionally"
Thanks for no music. Robot voice was not as bad as most but still not great.
You welcome.
Appreciate your feedback
Pipe destination in this video -SHANGHAI CHINA
If it has a seam, it’s no longer called pipe. It’s called tube.
Thank you for raising that point! It’s always good to have knowledgeable viewers like you who keep the conversation on track.
Not really. It's called a pipe when it's the inner diameter that matters, and a tube when it's the outer diameter.
@@turbotoblast4 that’s incorrect. in pipe the OD matters as you have to be able to make connections. One inch pipe is 1” OD no matter what schedule. The difference is the intended use and manufacturing process.
You’ve got it! Just remember, whether it’s a pipe or a tube, they both have one thing in common: they’re great at carrying the flow of conversation!
@@AlJazariedu Good joke!! 😂
ultraviolet magnetic particles ????
They stick to the cracks when the pipe is magnetised, then a UV light can be used to see them.
@@alexjohnward okayyy.... So maybe better call them fluorescent rather than ulttaviolet ? Thanks for the answer in any case.
Thanks for your answer.
I thought they were made by centrifuging molten metal, now I know why they cost so much.
Thanks for your comment.
Centrifugal casting is also used for tube production but the product has different properties and applications.
@@AlJazariedu OK. Thanks.
How about putting in English units as well as metric?
Thanks for you suggestion, I will tray later.
@@AlJazariedu But not on the audio channel, please. That would make it difficult to process all the numbers. I already had to listen two times to "one-thousand-two-hundred-and-fifty-two-one-thousand-three-hundred degrees". I suggest to only give one number for such ranges.
@@Hans-Peter-o9n All right, I will consider your suggestion. 👍👍👍
AI
🤔
The way you speak and your intonations sound very similar to an AI voice
I appreciate your observation! I've always aimed for a clear and engaging delivery, so I'm glad it resonates with you.
*mahn i lorve ai*