1996 IX Code change

[metalhoosier]

From what I am told, in 1996 some electrode mfg's went to the ASME code stating they could not meet the mechanical requirements for a E9018 and others could. So the code was changed stating that the E9018 can now be used and called an E8018.

Well, the electrode suppliers who were able to meet the code originally for the E9018 mechanical requirements renamed the product E8018, but state on the data sheet with the electrodes that it meets the SFA 5.5 and E9018 specifications.

What have others done who's old WPS's spec E9018 and the only welding rod, the E8018 (that meets the E9018 spec) is available? If some of you could let me know how you handled this issue, I would be very appreciative.

Metalhoosier

 

[metengr]

You are referring to the L grade electrodes, and it was found during PWHT where the L grade could not meet the strength requirements of the original specification (ie.,
E 9018 B3L could not meet 90 Ksi after PWHT so it was down graded to E 8018 B3L.

We simply do not purchase Cr-Mo L grade welding electrodes.

 

[metalhoosier]

metengr,

What type of covered electrode do you purchase then to take the place of the B3L? 9018-B3? If so, have you noticed any issues with cracking?

Metalhoo

 

[metengr]

We purchase

E9018 B3
E8018 B2

We do not permit Cr-Mo L grade electrodes. No, we have had absolutely no issues with weld deposit cracking (low hydrogen lelctrodes and sufficient preheat) from the slightly higher carbon content. Keep in mind the L Grades are not permitted by B31.1 Piping Code because of the lower creep strength (lower carbon).

 

[stanweld]

metalhoosier
The L grades are commonly specified in the petrochemical industry where service is not at high temperatures (hydrogen or other service where weld hardness is required to be controlled). The 8018 B3L or 7018 B2L fillers more than meet the tensile requirements of P22 and P11 alloy steel pipe and can be safely used and are often specified for use by the Owners.

 

[metalhoosier]

Thank you both for the excellent info and background.