asme bpvc section ii-d 2007

SUBPART 1 STRESS TABLES

STATEMENT OF POLICY ON INFORMATION PROVIDED IN THE STRESS TABLES

The purpose of this Statement of Policy is to clarify which information in the stress tables is ~nandatory and which is not. The information and restrictions provided in the Notes found throughout the various stress tables provided in Subpart 1 of Section 11. Part D are mandatory. It is vital to recognize that lines of information in Tables IA. IB, 2A, 2B. 3, and 4 frequently have essential information referenced in the Notes column. These Notes are organized as follows:

( ( I ) EXX: defining onset of values based on successful experience in service

(b ) GXX: general requirements (c) HXX: heat treatment requirements (d ) SXX: size requirements ( e ) TXX: defining onset of time-dependent behavior If') WXX: welding requirements

The specifications and grades or types, coupled with the assigned Notes for each line. provide the complete description of material in the context of the allowable stresses or design stress intensities. Additional requirements for particular types of construction must also be obtained from the rules governing the construction.

In Tables 1A and 2A. the information in the Nominal Com- position column is nonmandatory ant1 is for information only. However. these nominal compositions are the primary sorting used in these two tables. See Appendix A. The information in the Alloy DesignationIUNS Number column is nonmanda- tory for specifications for which a grade or type is provided. This is primarily true for the nonstainless-steel-alloys in these tables. For specifications for which no type or grade is listed. the UNS number is mandatory. Particularly for the stainless steels. for which no type or grade is listed, the UNS number is the grade.

The only difference between Tables I A and 2A. and Tables I B and 2B. with regard to the mandatorylnonmandatory nature of the information. is that in Tables 1B and 2B. the UNS

number information is used as the basis of the sorting scheme for materials and is allnost always mandatory.

Where provided, the information in the columns for Product Form, Specification Number. TypeIGrade, ClassIConditionl Temper. SizeIThickness, and External Preswre Chart Number is mandatory. The information in thc P-Number and Group Number colunlns is also mandatory: however. the primary source for this infc)rn~ation is Tablc QWIQB-421- in Section 1X. When there is a conflict between the P-n~~mber and Group ~iuniber information in these stress tables and that in Section IX. the numbers in Section IX shall govern.

The information in the Mininiuin Tensile Strength arid Min- inium Yield Strength columns is nonmandatory. These values arc a primary basis for establishing the allowable stresses and design stress intensities. When there is a conflict between the tensile and yield strength values in the stress tables and those in the ~naterial specitications in Section 11. Pasts A and B, the values in Parts A and B shall govern.

The infornlation in the Applicability and Maximum Tem- perature Limits columns is mandatory. Where a material is permitted for use in more than one Construction Code. and in the SI units version of these tables, the maxitilum use temperature limit in lhcse columns is critical. The temperature to which allowable stress or design stress intensity value\ are listed is not necessarily the temperature to which use i \ permitted by a particular Construction Code. Dif i rent Con- struction Codes often have different use temperature limits for the same material and condition. Further. in the SI units version of the stres\ rablcz. vall~es rnay be listed in the table at temperatures above the niaximunr use telnperature limil. These stress values are providetl to pcrmit interpolation to be used to determine the allowable stress or design stress intensity at temperatures between the next lowest temperature for which stress values are listed and the maximuin-use temperature limit listed in these columns.

2007 SECTION 11, PART D (CUSTOMARY)

TABLE 5A Table 5 A is available for review and download at

http:Nwww.asme.orglcodes/pubI icat ions/Sect io~ i~I I D-2.cfm and wi l l be published i11 the 2008 Addenda.

2007 SECTION 11, PART D (CUSTOMARY)

TABLE 5B Table 5B is available for review and download at

http:llwww.asme.orglcodes/publ icat ionsISect io~i~II D-2.cfm and will be published in the 2008 Addenda.

2007 SECTION 11, PART D (CUSTOMARY)

SUBPART 2 PHYSICAL PROPERTIES TABLES

INTRODUCTION

Subpart 2 of Section 11. Part D provides, to the extent possible, physical properties for most of the alloys used in Code construction. Included in this Subpart are tables of thermal expansion (instantaneous. mean. and linear), thermal conductivity and thermal diffusivity. and modulus of elasticity. These values are all listed as a function of temperature from 70°F to as high as 1650°F. Subpart 2 also contains tables of density, approximate melting range, specific heat at 212"F, Poisson's ratio, and modulus of rigidity for nonferrous alloys.

All of the properties provided in Subpart 2 are considered typical. They are neither average nor minimum. Thermal- physical properties such as thermal expansion. thermal conductivity. and thermal diffusivity are affected more by alloy content than by crystal structure or heat treatment. Due to the permitted range for elements comprising alloys (specification ranges of chemical compositions), the ther- mal-physical properties described in Tables TE- 1 through TE-5 and Table TCD should be considered to have an associated uncertainty of 510%. Values of specific heat

found in Table NF-2 should also be assumed to have the same associated 5 10%- uncertainty.

Moduli of elasticity and rigidity. and Poisson's ratio, are also typical values, but the values of modulus of elasticity, shown as a function of temperature in Tables TM- 1 through TM-5, tend to be closer to average values since their tem- perature dependency is factored agains~ an "average" room- temperature value.

For those alloys for which physical properties are not yet addressed in Subpart 2. the user of the Code may use other authoritative sources for the needed information. In those instances, the user is encouraged to bring the informa- tion to the attention of the ASME Boiler and Pressure Vessel Committee so it might be added to Subpart 2. Infor- mation should be directed to:

Secretary ASME Boiler and Pressure Vessel Committee Three Park Avenue New York, NY 100 16-5990 Telephone: (212) 591 -8533 Fax: (212) 59 1-8501

2007 SECTION 11, PART D (CUSTOMARY)

SUBPART 3 CHARTS AND TABLES FOR

DETERMINING SHELL THICKNESS OF COMPONENTS UNDER EXTERNAL PRESSURE