Civil Engineering Reference
In-Depth Information
Exercise 1 solution
RT
AWS
R
ISO
A1
MR
AWS
4 × 6
6
10
AWS
10
G
ISO
A
10
ISO
10
z6
17.5
Exercise 1 solution (dimensions are in millimetres).
Comments
In
Fig. 17.5
, the AWS welding symbol for the circumferential butt
weld includes an instruction for radiographic testing. There is no
ISO symbol for NDT so the testing requirement is indicated by the
A1 notation in the tail which refers to a note on the drawing or in
the Welding Procedure Specification (WPS).
The weld on the face of the flange is to be finished flush with the
end of the pipe face, which the AWS symbol indicates by the letter
G for grinding. The ISO symbol implies that mechanical means of
finishing will be required but the method is not specified. The ISO
6 ¥ 4 mm fillet weld would be referred to in a separate drawing or
instruction indicated by the letter A in the tail. In fact there is not
much that the welder can do except fill the available space with
weld metal.
