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[ASME标准] ASME B16.47-2011-中文版 大尺寸法兰规范

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发表于 2019-3-9 15:15:43 | 显示全部楼层 |阅读模式
ASME B16.47-2011-中文版 大尺寸法兰规范,可结合英文版对比查看

In November 1980, a task forcewas appointed within Subcommittee C of the American National
Standards (ANSI) B16 Committee to develop a standard for pipe flanges in sizes NPS 26 through
NPS 48. Every attempt was made to standardize those dimensions that existed within the industry
for the materials covered by ANSI B16.5.
Prompted by suggestions from committee members, the task force was authorized to increase
the size range to NPS 60. The first draft was developed in December 1982 to include Class 75
through Class 1500 for the size range NPS 26 through NPS 60. Flange dimensions were based
on the Manufacturers Standardization Society, Standard Practice (MSS SP) 44 flanges, except for
Class 75 flanges that are ANSI/API 605 flanges.
At the request of the American Petroleum Institute (API), flange dimensions, in accordance
with the API Standard 605, were included in the subsequent drafts. Class 1500 flanges were
deleted due to a lack of interest in using large size flanges in that pressure–temperature rating.
The API-605 flanges for Classes 150 and 300 and for sizes NPS 36 and smaller for classes higher
than Class 300 are not compatible with the MSS SP-44 flanges. Thus, the MSS SP-44 flanges are
designated as Series A flanges, and the API-605 flanges are designated as Series B flanges in this
Standard. Materials covered in this Standard are as in ANSI B16.5, except nickel base alloys are
excluded. Pressure–temperature ratings are in accordance with ANSI B16.5.
In 1982, American National Standards Committee B16 was reorganized as the American Society
of Mechanical Engineers (ASME) B16 Committee operating under procedures accredited by ANSI.
Following approval by the Standards Committee and ASME, approval as an American National
Standard was given by ANSI on June 12, 1990.
The 1996 Edition allowed flanges marked with more than one material grade or specification,
revised flange face finish requirements, revised pressure–temperature ratings for several material
groups, added permissible flange facing imperfections, added blind flanges for Series B flanges,
and included several other revisions. Following approval by the Standards Committee and ASME,
Boiler and Pressure Vessel Committee, ANSI approved the previous edition as an American
National Standard on October 3, 1996 with the new designation ASME B16.47-1996.
In 2006, several revisions were made, including use of metric units as primary units, with
U.S. Customary units in either parenthetical or separate forms. Mandatory Appendix I was
provided after the main text for convenience to cover ratings and dimensions in U.S. Customary
units. Inch dimension bolt holes were retained for flanges manufactured to metric dimensions
to avoid fit up problems. Development of metric dimensions was done to reflect the intended
precision of the dimension rather than by numerical conversion. For some materials pressure–
temperature ratings were revised to reflect revisions to material strength properties (tensile and
yield) listed in the ASME Boiler and Pressure Vessel Code, Section II. Some materials were
assigned to different rating tables in order to minimize changes to ratings for commonly used
materials. Following the approvals of the Standards Committee and ASME, approval for the
revised edition was granted by the American National Standards Institute on November 6, 2006.
In the 2011 edition, the References section has been revised to cover the requirements of material
specification editions other than those listed in Mandatory Appendix III. Additionally, this
Standard was updated in regard to the latest revisions to ASME B16.5.
All requests for interpretation or suggestions for revisions should be sent to the Secretary,
B16 Committee, The American Society of Mechanical Engineers, Three ParkAvenue,NewYork,NY
10016-5990. As an alternative, inquiries may be submitted via e-mail to: [email protected].
ASME B16.47-2011 was approved by the American National Standards Institute on
August 17, 2011.



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