Re: Re: [MW:9963] WELDING PROBLEM

Hi,
Heat input is essential variable.Make sure that prier to weld, the heat input has to be monitor and should not be less than WPS parameters.
Regards,
Ramu

On Sat, Feb 12, 2011 at 9:57 PM, john rodrigues <johnrodrigues2@rediffmail.com> wrote:

Eldho,

Further to trailing mail, welding electrodes E6010 and E7010 are not suitable for welding of API 5L X65.

Check the strength.

Regards.

John

The Pipe is = API 5L -Gr.X65Electrodes are E6010 (Root) and E7010(Filler+ Capping)Code : API 1104.

On Sat, 12 Feb 2011 19:09:34 +0530 wrote

>Eldho,
>
Good morning,
>
If there is specifiction for this project, it will dominate requirements of API 1104. My advise for you is as below.
>

>
Check the time between weld passes listed on WPS. Time beween passes is essential variable as per API 1104, clause 5.4.2.8.
>
Clause says "An increase in maximum time bteween completion of root bead and start of second bead (hot pass) constitute an essential veriable"
>

>
What to do after hot pass or second bead? Code is silent. It does not say anythig.
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It is upto manufacturer to decide. In other words, time between weld passes after hot pass (second bead after root pass) is non-essential variable.
>

>
There is no need to cut the joints. You can proceed with welding provided,
>
1. Proper buffing is carried out to remove rust
>
2. Maintain interpass temperature as per project approved procedure.
>

>
I told you earlier as well, all answers are in code book. Do you remember? Just read it with interest.
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>
Have a nice day.
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>
John Rodrigues
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>

>

>

>

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On Sat, 12 Feb 2011 18:50:34 +0530 wrote
>
>Dear All,
>
Presently I am working in a crosspipelineproject, an unexpected problem hasoccurredduring the production,due towhichthe welding had to be stopped,but there is 19 joints which has completed only the (root +hot-pass),still there is (Filler 1 + Filler 2 + Capping) balance and the joints has been left open for more than 48hrs.
>
My doubt is, if I want to resume the welding now ,whether I have to cut out all the 19 joints andre-weld ?orShould I reheat and resume with the welding.?
>
If the joints has to be cut out where is it mentioned so (any applicable code)
>
The Pipe is = API 5L -Gr.X65Electrodes are E6010 (Root) and E7010(Filler+ Capping)Code : API 1104.
>

>
Kindly please suggest your expert advices on this issue.
>
Thanking You,
>
Eldho Isaac.
>

>

>

>

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>
John Rodrigues




John Rodrigues

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