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Wednesday, February 9, 2011

Re: [MW:9792] thickness of WELDOLETS

Dear
 
The major problem with weldolets ia in procurement stage. The weld groove details, thk. are governed based on pressure rating of system.Many times high thk. weldolets are ordered even if not required as per design.MSS SP documents gives guidelines for weldolet dimensions and most of weldolet manufacturers pprepares weldlets with those details.
 
Correct way is to check required weld thk. at neck for proper weld thk. required.
 
Regards,
 
Manish Kulkarni 

--- On Wed, 9/2/11, manpreet <manpreetsin88@rediffmail.com> wrote:

From: manpreet <manpreetsin88@rediffmail.com>
Subject: Re: [MW:9790] thickness of WELDOLETS
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: Wednesday, 9 February, 2011, 11:07 AM

Dear Ali,

I really couldn't understand what you are asking for, but would like to detail some of the information about weldolet connection.

Weldolet might be rquired for connecting main pipe to branch (let's say dissimilar OD/thickness), now qustion arises whether weld bevel shall be completely filled out, though B31.3 calculation might not require full volume of weld, good practice is to completely fillup the weld bevel to weld line on the O-lets. Smooth transition between the pipe and the O-lets is required. Notches below the weld line shall be avoided.

Please descibe your query with quantitative information.

Regards
Manpreet Singh



On Tue, 08 Feb 2011 21:39:06 , Ali Asghari <asghariali@rocketmail.com> wrote
Dear All
According to ASME B31.3 fig328.5.4.D( SKETCH1) the thickness of weld deposit is calculated acc to 331.1.3.
Now in weldolet fittings that have unequal thicknesses in both of ends. Tb is equal to thicker or thinner thickness?why?
we need to know for calculating of governing thickness for PWHT.
regards.

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