Leakage of stainless steel seamless elbows is a headache because it will affect work efficiency and use effect. Don’t panic if leakage occurs! We need to find out the cause of the leakage and deal with it “accurately”.
There are two common leakage factors: one: welding joint, two: sealing surface.
One: Welding joint leakage
Errors in the welding process of stainless steel seamless elbows, such as welding pores, incomplete welding, etc., and material mismatches will cause joint leakage.
Countermeasures:
① Use argon arc welding (TIG) to ensure welding quality.
② Use transition joints to avoid direct welding of dissimilar metals.
Two: Sealing surface damage
Scratches on the flange sealing surface and aging of the gasket due to various reasons will cause damage to the sealing surface.
Countermeasures:
① Check the smoothness of the sealing surface before installation (Ra≤3.2μm).
② Replace high temperature resistant gaskets (such as graphite wound gaskets).