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Metric Welding

Metric Welding

Metric Welding

(OP)
I have a fabrication drawing from the UK that has a z3, z6, and such in front of the weld symbol were weld size usually goes.  What does that mean?  I doubt it means 3mm, 6mm, etc. since it is on an aluminum structure.

RE: Metric Welding

The weld size is on the leader side of the Z and the weld length would be on the back side of the Z if it was going to be specified.  

RE: Metric Welding

(OP)
I'm thinking that "may" not be correct unless they did the drawing incorrectly.  On this particular drawing, they have the number on the right of the z regardless of where the leader is.

I know that with ANSI/AWS, the size is always to the left of the symbol and the length is always to the right of the symbol regardless of which side the leader is on.

Just to clear up my original post, when I sad the z6 was in front of the symbol, I was referring to the left of the symbol.

RE: Metric Welding

I have attached a link that we use for verifying European Welding symbols. The size should be to the left of the fillet symbol if it is drawn correctly but just like AWS and CWB weld symbols the drawing is rarely correct.  

RE: Metric Welding

Per the attached synopsis, "Z" is the leg size, thus the inspection gage size.  Thank you REGRUMBLE

RE: Metric Welding

Just be sure to check everywhere on the drawing for a referenced detail first.  

I have seen comparable details that the field had assumed was a leg size, when in reality it was referencing a size that was on a separate detail drawing, which varied based on component thickness.

RE: Metric Welding

Double check: Last I remember, Euro standards were to define the weld throat - NOT the weld leg heights - for fillet welding.    

RE: Metric Welding

I second that, being a welding engineer in Europe.

Can you post the drawing (or a part of it)?

It is possible, but very unlikely, or incorrectly specified/drawed.

It has to be said, UK has always done things differently than on the mainland, so they might have adopted USA standards in this particular case?

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