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ASME B16.21 2005 PDF

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ASME  B16.21

Revision / Edition: 05      Chg:      Date: 05/31/05


NONMETALLIC FLAT GASKETS FOR PIPE FLANGES


Document Abstract
General

This Standard covers types, sizes, materials, dimensions, tolerances, and markings for nonmetallic flat gaskets. These gaskets are dimensionally suitable for use with flanges described in the referenced flange standards.

Relevant Units

This Standard states values both in metric and U.S. customary units. As an exception, diameter of bolts and flange bolt holes are expressed in inch units only. These systems of units are to be regarded separately as standard. Within the text, the U.S. customary units are shown in parentheses or in separate tables. The values stated in each system are not exact equivalents; therefore, it is required that each system of units be used independently of the other. Except for diameter of bolts and flange bolt holes, combining values from the two systems constitutes nonconformance with the Standard.

Quality Systems

Requirements relating to the product manufacturers' quality system programs are described in Nonmandatory Appendix A.

References

Standards and specifications adopted by reference in this Standard are shown in Mandatory Appendix II.

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