General
recommendations
ASME Section VIII Division 1 Code Reference - Pars.
UG-4, UG-5
Material
must conform to a material specification given in Code Section II
ASME Section VIII Division 1 Code Reference - Pars. UG-6,
UG-7, UG-8, UG-9, UG-10, UG-11, UG-12, UG-13, UG-14, UG-15
One
set of original identification marks should be visible: name of manufacturer,
heat and slab numbers, quality and minimum of the range of tensile strength. If
unavoidably cut out, one set must be transferred by vessel manufacturer.
Inspector need not witness stamping but must check accuracy of transfer.
ASME Section VIII Division 1 Code Reference - Pars.
UG-77(a), UG-94
To
guard against cracks in steel plate less than 1⁄4 in and in nonferrous plate
less than1⁄2 in, any method of transfer acceptable to Inspector to identify
material may be used.
ASME Section VIII Division 1 Code Reference - Pars.
UG-77(b)
Plates
given full heat treatment by the producing mill shall be stamped with the
letters MT.
ASME Section VIII Division 1 Code Reference - Pars. UG-85,
SA-20 Section II, Part A
When
required heat treatments of material are not performed by the mill, they must
be made under control of the fabricator who shall place the letter T following
the letter G in the mill plate marking. To show that the heat treatments have
been completed, the fabricator must show a supplement to the Material Test
Report.
ASME Section VIII Division 1 Code Reference – Pars. UG-85,
UCS-85,
UHT-5, UHT-81
Vessel
manufacturer shall obtain Material Test Report or Certificate of Compliance for
plate material.
ASME Section VIII Division 1 Code Reference – Pars. Part
UG-93
Inspector
shall examine Material Test Report and material markings.
ASME Section VIII Division 1 Code Reference – Pars.
UG-93, UG-94
When
stamping ferritic steels enhanced by heat treatment, use low-stress stamps.
ASME Section VIII Division 1 Code Reference – Pars.
UHT-86
Other
markings in lieu of stamping
ASME Section VIII Division 1 Code Reference – Pars.
UG-77, UG-93
For
some product forms, marking of container or bundle is required.
ASME Section VIII Division 1 Code Reference – Pars.
ULT-86, UG-93
Material
must conform to a material specification given in Code Section II except as
otherwise permitted.
ASME Section VIII Division 1 Code Reference – Pars.
UG-10, UG-11, UG-15
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