welding electrode selection fro API 5L X70 grade pipe

[Chandra Bhanu Mohapatra]

Dear Expert

                   Can anybody suggest me the electrode selection for cross country pipeline with  grade of API 5L X70

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tHanks & rEgards

Chandra Bhanu Mohapatra

[Vinay Thattey]

E7018

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[gbr...@gmail.com]

Electrode selection will depend some on wall thickness and welding process.

 

If using stick welding (SMAW) you should try to overmatch strength of electrode to actual pipe yield and tensile strength especially for X70 pipe.  X70 pipe actual yield strength is commonly above 85KSI and actual tensile strength above 95KSI.  There are several known pipeline failures where E80XX and E70XX electrodes were used for X70 pipe especially at road crossing tie-in locations where there is more likely external land forces on the pipeline that concentrates high girth welds.  An E9018 or E10018 can be used. Extreme caution is required if an E9010 electrode is used.  It has a tendency to produce weld cracks when wall thickness is greater than 10mm and when sufficient preheat is not used.  One needs to consider the ability of the welders to weld the open root pass and second pass with EXX18 versus EXX10 type electrodes. It is quite common to use EXX10 type electrodes for root pass and second pass and then change to an EXX18 or EXX45 type electrode for fill and cap passes for X70 pipe.

 

There are many good mechanized welding systems and electrodes for X70 if that option is chosen.

 

Work with the pipe mill to get lower end strength for the X70 pipe – max yield 85KSI and max tensile 95KSI is possible.

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[Khul ke jiyoo kya pata Kaal hoo na hooooooo]

I don’t think E7018 is appropriate. If you have established any PQR then kindly share 

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On 16-May-2020, at 3:54 PM, Vinay Thattey <vinay....@gmail.com> wrote:



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[Chintan]

Use E7018 if pwht not required
Use E8018 G if pwht & impact required

[Khul ke jiyoo kya pata Kaal hoo na hooooooo]

Thanks for the response.
My straight requirement is as follows
Pipe-API 5L x 70 Thickness 17 mm
Welding requirement-Automatic orbital welding
Use-Cross country pipeline
Kindly provide Best suitable welding consumables Or can share any specific PQR
Thanks
Cam


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> On 17-May-2020, at 11:37 AM, Chintan <chin...@gmail.com> wrote:
>
> Use E7018 if pwht not required

> Use E8018 G if pwht & impact required
>

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[Kannayeram Gnanapandithan]

Use 9018-G 

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[vinay pawar]

Dear Sir

I have established the PQR in our ongoing project in Kuwait with E6010 root and other passes E7018, used this combination for Tie in welds only.

but for mainline we used Automatic mechanized welding process GMAW, production and quality wise the best method to carried out mainline welding.

selection of process and electrode completely depends upon your project spam, size of pipe with respect to thickness.

In India we have done x70 grade pipelines with following electrode

1.E6010-root and 8010 otherpasses,

2.E6010 root, E8010 hot pass and E81T1 Manual FCAW other passes.

3. E6010 root, E9045 P2H4R and FCAW GS other passes.

its all depend on your project client requirements.

With Regards

Vinay Digarse

On Sunday, May 17, 2020 at 11:37:50 AM UTC+5:30, bapun wrote:

I don’t think E7018 is appropriate. If you have established any PQR then kindly share 

Sent from my iPhone

On 16-May-2020, at 3:54 PM, Vinay Thattey <vinay....@gmail.com> wrote:



E7018

On Sun, 10 May 2020 at 09:01, Chandra Bhanu Mohapatra <bapunc...@gmail.com> wrote:

Dear Expert

                   Can anybody suggest me the electrode selection for cross country pipeline with  grade of API 5L X70

--

tHanks & rEgards

Chandra Bhanu Mohapatra

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[Khul ke jiyoo kya pata Kaal hoo na hooooooo]

Good information..
Do u have any update regarding automatic orbital welding for same.

Sent from my iPhone

> On 20-May-2020, at 9:02 PM, vinay pawar <vinayp...@gmail.com> wrote:
>
> electrode

[Charles Jacob]

Dear experts, 

Before using cellulosic electrodes in thermo mechanical processed pipes used in high sulphur environment. Pl consider the effects on sulphur corrosion cracking during operation.

Regards,

Charles V Jacob.

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[Hani Al Masry]

You can use E11018 

Regards 

HA

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[vinay pawar]

Dear Sir

i have worked with three different welding technique providers for GMAW process.

1. PWT

2 CRC

3 Serimax

this three are the best in market special for pipeline

With Regards

Vinay

9850740287

[QA/QC]

for root E6010 + E9018-G FOR FILL AND CAP