On-site installation of towers
Thread Content
After welding the field welds on segmented towers, should the proportion of RT inspections be 100%, or should it follow the requirements specified in the drawings? What standards serve as a basis?
As required by the drawings! Even if it doesn’t meet the requirements, it’s still a problem with the drawing design review.
During on-site welding, various factors related to the working conditions at the site may have a certain impact on the welding quality of the welds. Therefore, many on-site installations require a 100% inspection rate.
The drawing specification calls for 20%; however, 50% or 100% inspection can also be performed. To ensure quality, 100% inspection is recommended
Although there are no specific provisions in the standards and specifications, considering the on-site operating conditions as well as quality and safety, it is advisable to conduct 100% inspection of welds that are welded on site.
The monitoring ratio requirements shall be in accordance with the design drawings; the design does not differentiate between factory and on-site installation. You’re concerned that factors such as on-site welding conditions might affect the welding quality, and thus you want to increase the inspection ratio. There probably isn’t any specific standard governing this; in my opinion, it’s sufficient as long as it meets or exceeds the requirements specified in the drawings.