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ASTM A 20/A 20M Document Information:
Title
Standard Specification for General Requirements for Steel Plates for Pressure Vessels
ASTM International
Publication Date:
Nov 1, 2007
Scope:
This general requirements specification2 covers a
group of common requirements that, unless otherwise specified in
the applicable product specification, apply to rolled steel plates
for pressure vessels.
This general requirements specification also covers a group of
supplementary requirements that are applicable to several of the
above product specifications as indicated therein. Such
requirements are provided for use if additional testing or
additional restrictions are required by the purchaser, and apply
only if specified individually in the purchase order.
Appendix X1 provides information on coil as a source of plates
for pressure vessels.
Appendix X2 provides information on the variability of tensile
properties in plates for pressure vessels.
Appendix X3 provides information on the variability of
Charpy-V-Notch impact test properties in plates for pressure
vessels.
Appendix X4 provides information on cold bending of plates,
including suggested minimum inside radii for cold bending.
These materials are intended to be suitable for fusion welding.
When the steel is to be welded, it is presupposed that a welding
procedure suitable for the grade of steel and intended use or
service will be utilized.
In case of any conflict in requirements, the requirements of the
applicable product specification prevail over those of this general
requirements specification.
Additional requirements that are specified in the purchase order
and accepted by the supplier are permitted, provided that such
requirements do not negate any of the requirements of this general
requirements specification or the applicable product
specification.
For purposes of determining conformance with this general
requirements specification and the applicable product
specification, values are to be rounded to the nearest unit in the
right-hand place of figures used in expressing the limiting values
in accordance with the rounding method of Practice E 29.
The values stated in either SI units or inch-pound units are to
be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall
be used independently of the other. Combining values from the two
systems may result in non-conformance with the standard.
This general requirements specification and the applicable
product specification are expressed in both inch-pound units and SI
units; unless the order specifies the applicable "M" specification
designation (SI units), the plates are to be furnished to
inch-pound units.
*A Summary of Changes section appears at the end of this
standard.
2 For ASME Boiler and Pressure Vessel Code
applications, see related Specification SA-20/SA-20M in Section II
of that Code.
Keywords:
- general delivery requirement
- pressure containing parts
- pressure vessel steels
- steel plates
- steel plates for pressure vessel applications
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