Why can't the elbow be welded directly to the flange
Release time:
May 21,2025
Specifications have clear requirements, not allowed to construction, need to add 1.5 times the diameter of the straight pipe section. Due to the different thickness of the flange and the elbow, when the temperature changes, the difference between the inner and outer circles of the elbow is large, and the expansion amount is very different. If the direct welding of the flange, the strength of the flange is much higher than that of the elbow, it is easy to lead to the stress release at the weld of the elbow, which will cause the weld to crack, especially in the medium where the steam isothermal becomes larger.
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The differences between spiral steel pipes and seamless steel pipes
Seamless steel pipes are preferred for high pressure and high temperature, while spiral steel pipes are given priority for medium and low pressure or large diameter demands.
Flange connection mode and process flow
Flange connection methods can generally be divided into five types: flat welding, butt welding, socket welding, loose sleeve, thread.
Points to note in the use of the head
Measure the outer perimeter of the head. If you need to process the cylinder, please ask the company for the size of the intended outer perimeter.
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