API Welding

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Welding electrode for API5L- grade X-60 & X-65

04/10/2008 1:01 AM

Wish to know ,

1)To weld API-5L grade X-60 & X-65 , can we use electrode E-7016-P1 , which is specified asalternate to E-8010-P1.

Few electrode manufaturuer have indicated that it can be used up to X-65 grade.

2) Can we use E-7018 for this application?

thanks.

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#5 "Re: Welding electrode for API5L- grade X-60 & X-65" by Abdel Halim Galala on

04/11/2008 3:58 AM (score 2)

bwireGuru

Join Date: Dec 2007Location: Upper Mid-

west USAPosts: 2260Good Answers: 12

#1

Re: Welding electrode for API5L- grade X-60 & X-65

04/10/2008 1:44 AM

Yes and no

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bwise

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jamkingygParticipant

Join Date: Apr 2008Posts: 4

#2


04/10/2008 11:01 PM
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2/4

hi,maybe,but i am supply aluminum alloy welding wires&rods i don't

know too much about other products

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rajiv_damaniAssociate

Join Date: Apr 2007Posts: 37

#3


04/11/2008 12:32 AM

Dear Sir,

E 7016 or E 7018 to be frankly speaking, is suggested, in the weldingindustry where there are jobs to be welded amongst unidentified metals.Or E 7016 GRADE is suggested many a times, to create a cushion or

buffer layer for applying hard facing electrodes. I not knowing the exactchemistry for your suggested metal, this both grade should work onprima facie. It would be more nice if you could elaborate the majorchemistry of your metals. Again, E 7016 or E 7018 type of electrodesare availables with several reputed companies, in conventional andmaintenance arc electrodes. I would suggest you rather to go withmaintenance where upfront cost might be higher than conventional butlongitivity of the job or in other words the life of the application is moredurably longer. Again, you'll need a specific power source for igniting E7018 electrodes in conventional type [minimum of 80 OCV] which is notthe case with maintenance types.

Hope to know the chemistry of your metal

THANKS & REGARDS

RAJIV DAMANI

__________________... ... ... addicted ... to WIN

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bwireGuru

Join Date: Dec 2007Location: Upper Mid-west USAPosts: 2260Good Answers: 12

#4

In reply to #3


04/11/2008 12:56 AM

Yes 7018 is loosely considered an all around rod with certain specificlimiting factors not often observed. 7018 is helpful when using chromolyand or some combinations of dissimilar metals but is just plain overkillwhen and old coat hanger will do.
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3/4

__________________bwise

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2Abdel Halim GalalaGuru

Join Date: Feb 2007Location: Cairo, Egypt

Posts: 838Good Answers: 53

#5


04/11/2008 3:58 AM

You can start with electrodes E7010 orE7010-G for the first pass andfill & cover with E7018, and take into consideration that the lowhydrogen family of EXX15, EXX16 and EXX18 must be heated to about250oC before using (see instructions on the box or can) to minimize themoisture which produces hydrogen, and the electrodes must be used inthe hot condition (please read perfectly the instructions). Also, E7018must be used in uphill direction (not downhill) and this instruction canbe also readable at box or from Electrode Datasheet obtained fromsupplier. A lot of details you have to know before applying the processsuch as volt, ampere, speed, ...etc., by reading the ElectrodeDatasheet.

For that purpose (your question and my suggestions), the ASME code,Section IX, ask you to prepare a Welding Procedure Specifications,WPS's and a Procedure Qualification Record, PQR's to satisfy yourselfthat your procedure, filler metal, base metals, welding parameters, ...etc. are all combined to produce a sound weldment.

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Guest#6


04/11/2008 8:36 AM

The key to your instructions was the 8010 designation. I would suggest

Lincoln 8018-B2. 80,000 psi all position Jetweld.

[email protected]

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bwireGuru #7

In reply to #6
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4/4

Join Date: Dec 2007Location: Upper Mid-west USAPosts: 2260Good Answers: 12


04/11/2008 11:22 AM

Agreed

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Off Topic (Score 5)

AbdulWasayAssociate

Join Date: Aug 2007Posts: 33

#8


04/15/2008 3:42 AM

Selection of electrodes are not merely based on compatibility with theWork (Pipes & Plates). It is most importantly selected after identifyingthe welding technique that is Vertical Up Hill welding or Vertical DownHill Welding. All electrodes are not suitable for VUH Welding and VDHWelding. Therefore a Contractor chooses welding techniques to aspecific job first, then he select the electrodes. Simple answer to thisquestion is yes you can weld X-60 or 65 with E-7016. But the point ishow many joints in how big spread and what quality of weld one islooking for. If you want to match the tensile strength, yes all threeelectrodes (E-7016, E-7018 and E-8010 would match or produce

stronger weld joint than the pipe, but all electrodes are not suitable forselected welding techniques. Therefore first determine whether you arewelding cross-country pipeline, refinery joints or station terminals. Thenyou work out the progress per day according to the schedule, Then youselect welding technique and then electrodes. Mind you all success isbased on the Mechanical Test of the Weld Coupons in ProcedureQualification Test. When every thing has worked good, your selectedelectrodes are perfect. Mind you E-7016 electrode is extreemly lowhydrogen electrodes and not recommended for VDH welding when youwant to produce satisfactory weld.
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