Accordıng to AWWA c208 standard, the deflections in the pipe aligment more than 5 degree must be settled with a fabricated elbow.
My main problem is regarding the angles up to 22.5 degrees.
Because when an elbow is fabricated in a workshop, I will have 3 welding joints along the pipeline(1 shop weld joint and 2 field weld joint)
As an alternative; instead of manufacturing this elbow in the workshop; I can cut miter for the two consecutive pipe(for 22.5 degree angle; 11.25 degree miter is on one pipe and 11.25 degree miter is on other pipe)
Actually geometrically I have the same shape for field manufactured or shop manufactured elbow. I have 2 less joint when it is done in field.
However my inspector opposes to this issue, Even in the standard it is clearly stated that field joints.
I can not find any supportive document.
Please advice what is the industrial practice?
My main problem is regarding the angles up to 22.5 degrees.
Because when an elbow is fabricated in a workshop, I will have 3 welding joints along the pipeline(1 shop weld joint and 2 field weld joint)
As an alternative; instead of manufacturing this elbow in the workshop; I can cut miter for the two consecutive pipe(for 22.5 degree angle; 11.25 degree miter is on one pipe and 11.25 degree miter is on other pipe)
Actually geometrically I have the same shape for field manufactured or shop manufactured elbow. I have 2 less joint when it is done in field.
However my inspector opposes to this issue, Even in the standard it is clearly stated that field joints.
I can not find any supportive document.
Please advice what is the industrial practice?
