ASME BPVC SECTION IX WELDING_TRAINING - PART 2

ASME BPVC SEC IX WLEDING_TRAINING

Part 2

In this section we will discuss about understanding the concept of F Number and finding the F Number of electrode/filler wire/filler rod.

F Number

A lot of electrodes and filler materials available with different properties according to different requirements. 

F number is a number assigned to a filler wire or electrode for the purpose of reducing the number of welding procedure qualifications required.

Each electrode and welding rod will have one ASME specification. If you know the ASME Specification (SFA No.) of a electrode or filler rod/wire we can see the details in the code ASME BPVC Section II C.

Each electrode and filler rod/wire will have one AWS classification e.g.:-E6013, E7018, E70-S2 etc.
Based on the AWS classification we can find out the F number from QW-432 of ASME BPVC Section IX.

Refer edition 2010 of the code for page numbers referred in this section.

Refer page number 134 for QW-432

Below are some examples of how to find the F number.

Q ) Find the F number of E6013.

Answer: 

Refer page number 134 of QW-432, Row 10, under the column of AWS classification  it shows EXX13, This shows that electrodes of any tensile strength but having the same characteristics which designate EXX13 will come under this F number.
Refer the first column F-No, in the Row.No 10, F no is 2 and under the column heading ASME specification SFA 5.1

Q) Find the F number of E6010

Answer: 

Refer row 14
SFA 5.1 & F No: 3

Find the F number of E 7018
Refer row no:20
F No:4 SFA no: 5.1

Q) Find the F number of E70-S2

Answer: 

For this you should know the SFA no.(You will get SFA number from ASME BPVC Section II C, the manufactures catalogue and the electrode/filler wire packet will also contain the SFA number.) SFA number of this filler wire is SFA 5.2, refer row 35 , F No: 6

This way F number can be obtained.

End of part 2 of this series.