Re: [MW:31887] Tubes expansion beyond drum thickness.

Please refer to literature on boiler tube expansion on www.venus- boiler. com

Regards

On Mon, 28 Dec, 2020, 3:07 pm Neeraj Yadav, <neeru25oct@gmail.com> wrote:

Any reference for expansion beyond drum thickness is not acceptable as per ASME Standards/IBR.

This is specifically mentioned in TEMA that expansion length shall be the tubesheet/drum thickness minus 1/8" (3.2 mm) and no expansion of tubes beyond drum/tubesheet thickness is acceptable.

However these standards are being followed for Heat exchangers (Heaters, condensers, coolers & re-boilers) only and our boiler is designed as per ASME Sec-1 and IBR.  

On Mon, Dec 28, 2020 at 10:37 AM Prasad Ghanekar <prsgne@gmail.com> wrote:

Expanded beyond shell thickness is not acceptable. There will be a notch formation on tube at edge of shell. Tubes are likely to be sheared at this point.

Prasad G.

On Sun, 27 Dec 2020, 10:31 Neeraj Yadav, <neeru25oct@gmail.com> wrote:

Min-8% to Max-20%

On Saturday, 26 December 2020 at 13:14:34 UTC+5:30 Vishwas Keskar Welding Manager WELDING wrote:

What is  expansion % ?

On Fri, Dec 25, 2020 at 3:57 PM Neeraj Yadav <neeru...@gmail.com> wrote:

Dear experts,

We are executing a project for 35 TPH Natural Gas fired Auxiliary Boiler designed for max. working pressure of 60 kg/cm2 and steam temperature of 392 Deg .Cel.

All water tubes of boiler are connected to steam( 63 mm Thk) & Mud drum(40mm Thk) with expanded design of construction.

In mud drum it is observed that tubes ( 51X4 mm) are expanded upto 30mm more than the drum thickness and indicating as bulged. we have checked the OD at bulged part and observed 1-2 mm flared and thickness around 3.5 mm

Kindly advise weather it is acceptable or we have to replace the se tubes with reference to code. Code of construction is ASME Sec-1/IBR.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-weld...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/bbc02a3f-f869-4c58-a898-ed522ce25df6n%40googlegroups.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/16689637-a056-4dff-b3da-adacc1f9062bn%40googlegroups.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAEi5r3b2OP2nUAVO1Nk%2B1YSVdwMKCh%3DPLQKn1zD0HtDBYWO%2B5w%40mail.gmail.com.

--

Thanks & Regards

Neeraj Yadav

M.No.:+91-9457487464, 7017375440

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAAHrL3F9nzm%3DB1MHOJpJYNxwB4k2pgniFFmv_U_%2BokVgEOu8Og%40mail.gmail.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CA%2B6Tn1%2B1H4pwo2Y-0AKHH-0k%3Dzo2rVsf64qJXAN46BUdfChU4w%40mail.gmail.com.