FCAW Process Filler wire E71T-1C does this come under low hydrogen electrode category?

[PK M]

Dear Sir,

 

Good day,

FCAW Process Filler wire E71T-1C does this come under low hydrogen electrode category?

 

ASME Sec IIC-SFA 5.20

 

A8.2.4 Most flux cored electrodes deposit weld metal having diffusible hydrogen levels of less than 16 mL/100 g of deposited metal. For that reason, flux cored electrodes are generally considered to be low hydrogen. However, some commercially available products will, under certain conditions, produce weld metal with diffusible hydrogen levels in excess of 16 mL/100 g of deposited metal. Therefore it may be appropriate for certain applications to utilize the optional supplemental designators for diffusible hydrogen when specifying the flux cored electrodes to be used.

 

Question no -01

 

In the engineering drawing for welding the anchor chair of atmospheric storage tank in the field, it is specified to “Weld with low hydrogen electrode”.

 

Can we weld with FCAW process using E71T-1C filler wire, ASME Sec IIC-SFA 5.20 for above mentioned application? The EN10204 3.1 certificate for the filler wire shows hydrogen test results performed on the deposited weld metal, a maximum of 3.0 ml/100g.

 

Question no -02

 

Is there any difference between “low hydrogen weld deposit” and “low hydrogen electrode” in the light of ASME Code?

 

 Note:-

Also Find attached files..

 

 

Please kindly provide code reference...

 

Thank you.

[C.Muni]

Dear PKM,

Its not coming under Low Hydrogen Electrode category.

Regards,

 Muniyandi Chithiran MBA.,MIIF,

AWS CWI,

ISO 9001,14001,17025,27001,OHSAS 18001 Auditor,

NDT Level II,

Mobile: 0091 95855 40965

Just because a relationship ends doesn't mean two people stopped loving each other.They just stopped hurting each other.

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[PK M]

Dear Mr.Muni,

Please kindly provide code reference...

 

Thank you.

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAMJSSYkDZskPp7OdRtG4k%3DAaB%2BKXtNE0Freb_PBtHF-URt0%2Bcw%40mail.gmail.com.

[S.Mohammed]

Question no -01
In the engineering drawing for welding the anchor
chair of atmospheric storage tank in the field, it is
specified to “Weld with low hydrogen electrode”.
Can we weld with FCAW process using E71T-1C filler
wire, ASME Sec IIC-SFA 5.20 for above mentioned
application? The EN10204 3.1 certificate for the filler
wire shows hydrogen test results performed on the
deposited weld metal, a maximum of 3.0 ml/100g.

YES YOU CAN USE.
IF.CLIENT SPEC.HAS.NO RESTRICTION.AS PER API650 NO ISSUES.

Question no -02
Is there any difference between “low hydrogen weld
deposit” and “low hydrogen electrode” in the light of
ASME Code?

NO DIFFERENCE.
LOW.HYDROGEN.DIPOSITE IS.ACHIEVED BY LOW.HHYDROGEN ELECTRODES.

Note:-

[Alan Denney]

3 ml/100g is clearly low hydrogen but your client's designer has assumed that you are stick welding. You need to issue a clarification request stating that your welding process is flux-cored arc welding and that you will be using welding consumables which are low hydrogen and requesting confirmation of acceptability. Presumably you tendered the job on FCAW and to change to stick electrodes would have a significant cost impact.

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