SS linings and PWHT
SS linings and PWHT
(OP)
ASME VIII 6.5.5.2 requires all vessels with SS linings to have PWHT why?
And why do 405 and 410S linings not require PWHT?
And why do 405 and 410S linings not require PWHT?
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RE: SS linings and PWHT
6.5.5.2 Requirements When Base Metal or Lining Is Chromium Alloy Steel. Vessels or parts of vessels constructed
of chromium alloy stainless steel clad base material and those lined with chromium alloy stainless steel applied linings
shall be postweld heat treated in all thicknesses, except that vessels clad or lined with Type 405 or Type 410S and
welded with an austenitic electrode or non-air-hardening nickel-chromium-iron electrode need not be postweld heat
treated unless required by 6.5.5.1.
RE: SS linings and PWHT
Nathan Brink
RE: SS linings and PWHT