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Hahaha! Thanks kingnero for the valuable input!! Is really a blessing to learn from so many experts over here. 😊😊😊

Thanks!

Hi all, Thanks for the valuable input. Just to clarify, if the web/head is the crack initiation point, do you mean the surface defect is the cause of the rail break? I would assume the crack initation point could also come from inclusion? I a bit confused who is the cuplrit to the rail break...

Hi experts, Is me again. Could you please advise whether the arrow pointed to the rail is crack origin or final fracture? Since the rail is consistently under compression, i would have expected it to be final fracture instead of crack origin. If it is crack origin, not sure why it appears...

Thanks!

Hi Kingnero, Could you explain a bit further? What do you mean by always? And where are the 2 dips that you are referring? Thankss..😊😊😊

If you look closer, there is a weld dip at the top. 😁

B side - 2https://files.engineering.com/getfile.aspx?folder=59c313b3-ce56-4e7f-89f3-d7efc2d8ed75&file=Screenshot_20190131-232508_WhatsApp.jpg

B side. Photo 1 https://files.engineering.com/getfile.aspx?folder=03d65c00-27e3-4ac9-b4de-2c40c4689ec9&file=Screenshot_20190131-232158_WhatsApp.jpg

I believe several combination may cause the rail crack. Welding is definitely one of them. But i am surprised that it can last for 7 years. Wow. Amazing.

Haha. Thanks! 😁

Please see attached. You can see the thermite welding at B side. Thanks. https://files.engineering.com/getfile.aspx?folder=dd73a10b-942b-41ff-80f9-4c14947895ba&file=Screenshot_20190131-232508_WhatsApp.jpg

Hi Experts, Would like to seek your opinion on the rail crack (see attached). Please advise. 1. Is that consider a beach mark around the circular patch? To me, it seem more like an oxidation rather than beach mark. 2. Consider thermite welding was performed to this rail 7 years ago, how will...

Hi Experts, May I ask for normal equipment (point machine in railway), what are the type of grease that can be applied to the motor bearing? Information: Equipment placed: Viaduct Temperature: Could be around 25 to 45 degree Environment: Normal/High vibration due to train passes Please...

Another photo attached. https://files.engineering.com/getfile.aspx?folder=2752b264-68de-4080-aa99-3cef42cc536e&file=IRJ_2.jpg

Hi All, This is IRJ. Attached some of the photos. Wondering what could be some of the causes that create the burnt IRJ. Is there any possibilities that would prevent from IRJ burnt? for example, fire resistance coating? Thanks...

Hi Compositepro, it is electric rail. The burnt occurred between 2 materials. The center material is a weaker materials (Insulated Rail Joint). Just wondering which one of the two will burn first. Hi IRstuff, will check with the respective engineer if there is any coating coated. Just...

Hi All Experts, Just a question, I am dealing with a burnt metal which is used in the track railway. Recently, there was a burnt on the metal, probably due to arc flash or arc blast. My questions are as follow: 1) Based on visual inspection, would we able to determine whether the burnt...

Hi dgallup, racookpe1978, Thanks for the feedback. I have concern over here and I will summarize in point form. a) On paper, the hole dimension is 22 mm. On the actual site, it was 21.70mm. b) The drill bit that was used to drill the hole stated diameter of 22 mm. However, when measured...

Hi racookpe1978, Yes, the copper lug used here allows the current to return to the substation. Due to the company policy, I cannot disclose the ORIGINAL drawing but I believe the updated document attached should have answered all your questions. Hope it helps...