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GBZ25756-2010: Vacuum technology -- Bakable flanges -- Dimensions of knife-edge flanges
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/Z 25756-2010 | English | 214 |
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Vacuum technology -- Bakable flanges -- Dimensions of knife-edge flanges
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GB/Z 25756-2010
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Basic data | Standard ID | GB/Z 25756-2010 (GB/Z25756-2010) | | Description (Translated English) | Vacuum technology -- Bakable flanges -- Dimensions of knife-edge flanges | | Sector / Industry | National Standard | | Classification of Chinese Standard | J78 | | Classification of International Standard | 23.160 | | Word Count Estimation | 11,188 | | Date of Issue | 2010-12-23 | | Date of Implementation | 2011-10-01 | | Adopted Standard | ISO/TS 3669-2-2007, IDT | | Regulation (derived from) | ?National Standard Approval Announcement 2010 No.10 (Total No.165) | | Issuing agency(ies) | Ministry of Health of the People's Republic of China | | Summary | This standard specifies the pressure range from atmospheric pressure as low as 10-13 Pa vacuum system used, fixed or rotating, bolted flange and blade types of baking size. | GBZ25756-2010: Vacuum technology -- Bakable flanges -- Dimensions of knife-edge flanges---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Vacuum technology.Bakable flanges.Dimensions of knife-edge flanges
ICS 23.160
J78
People's Republic of China national standardization of technical guidance documents
Vacuum technology to bake the flange
Knife flange size
(ISO /T S3669-2.2007, IDT)
Posted on.2010-12-23
2011-10-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
GB /Z 25756 Equivalent to ISO /T S3669-2.2007 "Vacuum technology bake flange Part 2. Blade flange size"
(English version).
For ease of use, the following technical editorial changes have been made in this Guidance Document.
--- Removed the foreword and introduction of international standards, added the introduction of this technical guidance document;
--- Use the decimal symbol "." Instead of as a decimal point comma ",";
--- In the "Figure 2 knife detail" added a knife edge enlarged view of the map clearer and more intuitive;
--- With the standard series of our standard range of dimensions marked "2 ° ~ 40 °" instead of "Figure 2 blade detail" in the 40 ° 2 ° blade angle size;
"4.0 ~ 4.0" instead of "4.01.5 slot size recommended size" in Figure 4 slot width size;
--- Unit 1 in Table 1 "mm (in)" unified written in the upper right corner of the table as "units are millimeters (inches)";
--- Table 2 in the unit "mm" unified written in the upper right corner of the table as "millimeters."
This guidance document is proposed by China Machinery Industry Federation.
This Guidance Document is governed by the National Vacuum Technology Standardization Technical Committee (SAC/TC18).
The guidance of technical documents responsible for the drafting unit. Beijing North innovative vacuum technology limited liability company.
The guidance of technical documents to participate in the drafting unit. Chinese Academy of Sciences Shenyang Scientific Instrument Development Center Co., Ltd., Beijing giant Youxing Technology Development
Limited liability company, Shenyang Institute of Vacuum Technology.
The main drafters of this guidance document are Yang Jing, Chen Yuezeng, Fan Liqun, Guo Dongmin, Zheng Rongxi, Xian Wei and Wang Xuezhi.
Introduction
In actual use, bake flange flanges have become an important part of vacuum system components. For a long time ISO /
TC112 has been trying to develop "vacuum technology can be baked flange knife flange size" standard. After the efforts of member states, ISO /
TS3669-2.2007 "Vacuum technology bake flange Part 2. Blade flange size" has finally been published.
To avoid confusion and help standard users understand the standard case, we provide some relevant information for illustration.
ISO 3669 consists of two parts.
--- ISO 3669.1986 "vacuum technology can be baked flange size";
--- ISO /T S3669-2.2007 "Vacuum technology bake flange Part 2. Blade flange size."
ISO /T S3669-2.2007 compared with ISO 3669.1986 made important technical changes, ISO 3669.1986 provides for two lines
Column of baking flanges.
--- Preferred series, the main dimensions to ensure compatibility with standardized non-toasted flanges (see ISO 1609);
--- Secondary election series, corresponding to the common flange.
ISO /T S3669-2.2007 defines only one series and no longer depends on the value of the "preferred" series. In fact, ISO 3669.
The 1986 "Preferred" series is outdated or obsolete, thus enhancing the "second choice" series to become one and the only set of prescribed sizes. another
In addition, several dimensions of this "second choice" series were also modified for general use of the flange until the detailed dimensions of the blade seal profile were
Included.
ISO /T S3669-2.2007 will be reviewed by ISO /TC112 after three years in order to decide whether to be within the next three years
Approved, revised to international standards, or withdrawn. If approved, it will be revised again in the next three years,
During this period, it must either be turned into an international standard or be withdrawn.
The above description of ISO 3669 consists in his connection to GB/T 16709.1-2010/ISO 9803-1.2007 "Vacuum Technology Pipe Fittings
Assembly dimensions - Part 1. Non-knife flange type ", GB/T 16709.2-2010/ISO 9803-2.2007" Vacuum technology piping
Assembly dimensions of parts - Part 2. Flange type "and GB/T 25754-2010/ISO 21358.2007" Vacuum technology Right-angle valve dimensions
And pneumatic interface, "the close relationship between them in the standard reference to each other.
Vacuum technology to bake the flange
Knife flange size
1 Scope
This guidance document specifies the fixed or rotatable type used in vacuum systems with pressures ranging from atmospheric pressure down to 10-13 Pa
Baking flange size with bolt-on and blade-type.
2 Terms and definitions
The following terms and definitions apply to this guidance document.
2.1
Knife type flange knife-edgestyleflange
Metal sealing flange, used in high vacuum and ultra-high vacuum areas.
Note 1. Insert a metal washer between the two knife-edge flanges, bolting the flanges tight and securing them with the flanged conical cutting edge into the metal washer
Of the plane, forming a seal.
Note 2. Initially developed as a CF (Conflat) 1) flange. The wide and consistent use of blade flanges has made it a de facto international standard and is now
From this section will be put together into a book.
2.2
Nominal diameter nominalbore
Flanges are used to specify the maximum actual size of pipe that the flange can accommodate.
Note. See Table 1 for the continuation of the convention of marking the original flange with flange OD (in the past in inches).
2.3
Leak detection leakcheckgroove
Grooves machined on the sealing side of the flange allow quick and unobstructed access of the leak gas to the metal washer from the perimeter of the flange
Sealing area.
3 symbol
Symbol name unit
l1 flange nominal diameter mm (in)
l2 maximum connection diameter mm (in)
l3 Bolt hole diameter mm (in)
l4 bolt hole center circle diameter mm (in)
φ bolt hole center position tolerance mm
l5 seal groove diameter mm (in)
l6 Knife diameter mm (in)
l7 Inner ring thickness mm (in)
l8 rotation connection depth mm (in)
l9 flange thickness mm (in)
l11 metal washer outer diameter mm (in)
1) conflat® is a trademark of Varian. This information is given for the convenience of users of this standard understanding and application, does not constitute
ISO some of the product name approval. It can also be used if the same product form produces the same result.
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