The surface pressure vessel weld undercut weld surface quality:
(1) pressure vessel weld surface quality of the weld surface undercut the standardtensile strength greater than 540MPa steel and Cr-Mo low alloy steel pressure vessel, made of austenitic stainless steel pressure vessels, cryogenic pressure vessels , spherical pressure vessels and weld factor of 1.0, pressure vessel, the weldsurface may not have undercut;
(2) above (1) outside the pressure vessel weld surface of the undercut depth of notmore than 0.5mm, undercut shall not exceed a continuous length of 100mm, total length of weld undercut on both sides of the weld length shall not exceed 10%;
(3) non-ferrous metal pressure vessel weld undercut surface shall meet thestandards.
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Keywords: reactor, heat exchanger, pressure vessel
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