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galal_elden
Associate

Join Date: Jan 2010
Location: pipe line project - KSA ( welding inspector - CSWIP 3.1)
Posts: 36

Welding Pipe API 5LX52 to Flange ASTM A105

06/08/2010 1:10 PM

For welding Pipe API 5LX52 to Flange ASTM A105 in a pipe line project we should use 7018 or 7010 is enough to give us the desired quality. (I think that fitting to fitting we have use 7018 but fitting to pipe, can we use 7010)
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SRIDHAR
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Join Date: Nov 2006
Location: Chennai - India.
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Good Answers: 18
#1

Re: Welding Pipe API 5LX52 to Flange ASTM A105

06/09/2010 1:12 AM

The difference between E 7010 and E 7018 is:

E 7010 is used for root welding application and has a UTS of 70,000 PSI. The electrode gives a deeper weld penetration and could be used in both Vertical up and vertical down positions. Welder is to be qualified according to the position of welding. balance passed could be done by E 7018 electrode.

E 7018 is used for root welding as well as fill and cap passes. It also has a UTS of 70,000 PSI. The electrode give a medium weld penetration and could be used in Vertical up and not recommended for vertical down position. Welder is to be qualified accordingly.

Hence you can use E 7018/E7010 for pipe to pipe or pipe to fitting or fitting to fitting.

Sridhar.

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