Welding Symbols

Gary Fowler

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That black flag with circle denotes it as a field weld with weld all the way around. That is a 2 mm gap with 30 degree bevel on each side of a 1/2" (12.7mm)thick plate with full penetration weld (CJP= complete joint penetration). I cant figure out the 1.83 SWSP but may denote the amount of weld reinforcement allowed.
 

bundy5150

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Thanks Gary,

That's exactly what I needed to know.

The 1.83 SWSP is actually referencing the pipe 1.83 meter diameter Smooth Wall Steel Pipe, 12.7mm wall thickness and ASTM A252 Pipe Specification
 

Gary Fowler

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Thanks Gary,

That's exactly what I needed to know.

The 1.83 SWSP is actually referencing the pipe 1.83 meter diameter Smooth Wall Steel Pipe, 12.7mm wall thickness and ASTM A252 Pipe Specification
I have never seen abbreviation used on any drawing before and I worked construction for 45 years with many different engineering firms doing the design. The size is all they needed to spec since the ASTM spec is given.
 
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