[MW:919] Re: Welding Baffle Plate on EQ. TEE

The EQ. TEE is used at the bottom of a Flare Stack to connect the horizontal Flare Header to the Vertical Flare Stack. (Even we can use a 90 degree, Pipe - Pipe branch connection) The Baffle plate is welded inside the EQ. TEE to block / divert the drain liquid entrapped in the Flare Gas, which comes down through the walls of the Flare Stack. By the use of Baffle plate, the liquid drains are collected / diverted and it will be taken out from the Flare stack bottom after the baffle plate through a drain line connected to the Flare Header. So the Baffle plate is used to close the one side of the EQ. TEE and make it work like an Elbow. The blocked side of the EQ. TEE is welded on to a base plate and supported on a foundation. This is a small stack of height 5 meters. (A kind of ground Flare)

My doubt is, here the welding of the Baffle plate (elliptical shaped) inside the EQ. TEE will intersect with the EQ. TEE weld (TEE is welded construction.) Will this weld over weld creates any problem. The TEE welding is Butt welding with 100 % Radiography and the Baffle plate is a one side fillet welding to the EQ. TEE. The size of the EQ. TEE is 24'', 36'' & 42'' with a thickness of 9.53 mm and the Baffle plate is cut in an elliptical shape from a sheet and the thickness is 10 mm

Hope my query is more clear now

On Mon, Jul 14, 2008 at 7:24 AM, rajagopal kannan <rajagopal.kannan@gmail.com> wrote:

Dear Zameer,

As the weld is 100% radiographed, you can weld the baffleplate intersecting the long seam weld, provided the long seam weld is flushed with the surface.

The Baffle plate is welded in such a way that, it will block the one run side of the EQ. TEE.

We are not clear with the above point. What do you mean by this?

is this a flow of fluid or weld run?

Please explain.

Thanks and Regards,

K.Rajagopal

On Sun, Jul 13, 2008 at 10:02 AM, Zameer Mohammed <dreamthinkwork@gmail.com> wrote:

Dear Friends,

We have to weld a Baffle plate of 10mm Thick inside an EQ. TEE (24'', 36'' & 42''). The thickness of the TEE is 9.53 mm and all the EQ. TEES are welded construction with 100% RT. The Baffle plate is welded in such a way that, it will block the one run side of the EQ. TEE. Now the welding of the Baffle plate, will it creates and problem as it intersect with EQ. TEE weld at some point. Can we have two welding at a same point? The Baffle plate is fillet welded. The working pressure is 1 bar.

Kindly advice me,

Thank you,

Regards,

Sabir

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