Weld seams in SAW pipe
For the production of weld seams in SAW pipe, at least one submerged-arc welding pass shall be made on the inside of the pipe and at least one submerged-arc welding pass shall be made on the outside of the pipe.
PSL 1 EW pipe
For grades higher than Grade L290 or X42, the weld seam and the HAZ shall be heat treated so as to simulate a normalizing heat treatment, except that,
if agreed, alternative heat treatments may be substituted. If such substitutions are made, the manufacturer shall demonstrate the effectiveness of the
method selected using an agreed procedure. Such a procedure may include, but is not necessarily limited to, hardness testing,microstructural evaluation or
mechanical testing.For grades equal to or lower than Grade L290 or X42, the weld seam shall be heat treated as to simulate anormalizing heat treatment,
or the pipe shall be processed in such a manner that no untempered martensite remains.
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