Large-diameter equipment flanges
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I would like to ask everyone: for ordinary equipment flanges with a diameter greater than 2000, what issues should be taken into consideration during design? Can it be done by using software? Are there any special requirements regarding the structural format? For example, what is the maximum diameter for butt welding? (Everyone, please share what you’ve seen) Should we still use a full flange? Should we still refer to the structure of the equipment flange? What are the various structures available, and what are their characteristics and advantages? What precautions should be taken when welding? The more detailed, the better. Thank you so much~~~ This post was last edited by cpu_amd on 2007-12-5 10:04.]
Forgings. Splicing may be required. 100% radiographic or ultrasonic testing is required for the welds of the spliced flanges. When manufacturing necked flanges from steel plates, the steel plates should be subjected to ultrasonic testing. Without any stratification defects, strips should be cut along the rolling direction of the steel plate; after bending and butt welding, they form a ring, with the surface of the steel plate serving as the side surface of the ring. The butt joints of the ring must have a fully penetrated weld structure. These joints shall undergo post-weld heat treatment as well as 100% radiographic or ultrasonic testing, with radiographic inspection meeting grade II and ultrasonic inspection meeting grade I. Flanges made of carbon steel or low-alloy steel with a flange thickness greater than 76, whether they are welded integral flanges or forged flanges, shall undergo normalizing or full annealing heat treatment.