FABRICATING BARS ON TEE TO MAKE BARRED TEE LOCALLY 1

[qureshifarid]

Actually i need barred tee of Size 12" x 8" Sch 60 & 18" x 8" Sch STD of Material Grade A234 WPB AS PER B 16.9 But due to urgency of the requirement for site completion we decided to make it from a Tee which is readily available ex-stock.
Now End User need to know whether these tee can be fabricated to barred tee locally or not as per ANY International / Industrial code.

 

[LittleInch]

AFAIK, there is, sadly, no "standard" way of manufacturing barred tees.

Literally welding "bars" across the throat, especially for relatively small tees is difficult, has a very small weld area and normally the barred tee does not stay barred for very long.

what you really need is a fabricated bars which weld with long fillet welds into the branch of the tee, sometimes with a pup piece welded to the tee. Something more like this

http://i00.i.aliimg.com/photo/v2/203575294_2/split_tee.jpg

Just google barred tee drawing and you find things like this

http://decarboni.se/sites/default/files/publications/books/180678/images/fig44.jpg

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[MortenA]

Talk to your pig supplier - they may have an input

 

[racookpe1978]

"Talk to your pig supplier - they may have an input "

They WILL have input: Particularly about the actual minimum clearance diameter needed. It will be very easy to place bars on the walls of the Tee that will hang up the pig or damage its sensor and seals as it snags while going by the edge of the bars.

 

[gfdoug]

I recently helped design one of these. You will be welding "bars" in to a pup piece and then welding the pup piece to the "teed" section of pipe forming your tee. There's no true standards to help guide you during this.

A couple issues we ran in to were:
1) fabricating and cutting the bars to proper dimensions w/ tolerance
2) welding procedures for welding the bars to the pup piece