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GB/T 27944-2011: Dry seal pipe threads with the thread angle of 60 degrees
Status: Valid
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| GB/T 27944-2011 | English | 789 |
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Dry seal pipe threads with the thread angle of 60 degrees
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GB/T 27944-2011
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Basic data | Standard ID | GB/T 27944-2011 (GB/T27944-2011) | | Description (Translated English) | Dry seal pipe threads with the thread angle of 60 degrees | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J04 | | Classification of International Standard | 21.040.20 | | Word Count Estimation | 34,350 | | Date of Issue | 2011-12-30 | | Date of Implementation | 2012-10-01 | | Quoted Standard | GB/T 14791 | | Adopted Standard | ASME B1.20.3-1976 (R2003), MOD | | Regulation (derived from) | National Standard Approval Announcement 2011 No.23 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the type of tooth 60 �� dry seal pipe threads, basic dimensions, tolerance, marks and gauges. This standard applies to pipe thread sealing performance have higher requirements, valves, threaded pipe fittings and other piping accessories connections. | GB/T 27944-2011: Dry seal pipe threads with the thread angle of 60 degrees---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.
Dryseal pipe threads with the thread angle of 60 degrees
ICS 21.040.20
J04
National Standards of People's Republic of China
60 ° Dry seal pipe thread
Issued on. 2011-12-30
2012-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard GB/T 1.1-2009 given rule drafting.
The standard adopted by the United States to redraft the law to modify the standard ASMEB1.20.3. 1976 "dry seal pipe thread" (2003 confirmed).
Our standards are different than the US standards are as follows.
--- Thread Size code. US Use Dx, Ex, Kx, p, D and d, respectively, large diameter threaded diameter, small diameter and pitch pipes
The outer and inner diameters; and our ISO and use D, D2, D1, d, d2, d1 and P denote the large-diameter internal threads, and diameter
Trails, large diameter external thread, diameter and small diameter, thread pitch. In order to avoid the country and ISO code system has undergone an existing thread
Conflict, this standard does not conflict with the use of that part of the United States occurred in the size of the code.
--- American Standard thread size is given in English units value; and this standard is based on the thread size metric units are given value.
--- High tolerance for tooth, American Standard is an indirect way of cutting depth is given; and this standard is based on the crest and bottom high given directly.
--- In the thread marks, the US standard is to give the size code thread after thread of the features of the code are given; and our standard thread
System marked the first thread of the features of the code, after the marked thread size code. In addition, to simplify the thread marks, our standards allow
Xu thread marks omitted in the number of the thread.
--- This standard supplements the provisions of the dry seal tapered pipe thread pitch cumulative tolerance and flank angle tolerance.
--- This standard supplements the provisions of the chamfer with the reference plane positional relationship.
--- This standard specifies the supplementary thread gauge.
--- The standard normative references are cited GB/T 14791 "Thread term."
This standard by the National Standardization Technical Committee thread (SAC/TC108) proposed.
This standard by the National Standardization Technical Committee thread (SAC/TC108), the National Technical Committee of Standardization measuring meter
(SAC/TC132) centralized.
This standard is drafted by. Zhejiang Institute of Metrology, the machine Productivity Promotion Center.
Participated in the drafting of this standard. Chengdu Ai Litas thread Tools Co., Ltd.
The main drafters of this standard. Mao Zhenhua, Ho Hong, Li Xiaobin, Liu Yuan die.
60 ° Dry seal pipe thread
1 Scope
This standard specifies a 60 ° tooth type dry seal pipe thread, basic dimensions, tolerances, marking and gauges.
This standard applies to the threaded pipe thread sealing performance higher requirements, valves, fittings and other piping accessories connections.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 14791 threads term
3 Terms and Code
3.1 Terms and Definitions
GB/T 14791 and defined by the following terms and definitions apply to this document.
3.1.1
Reference plane referenceplane
When the test thread gauge reads workpiece inspection value (position deviation reference plane) of the reference plane visible. It is internally threaded member
Externally threaded outer end or small end member.
3.2 Code
D --- threaded large diameter in the reference plane;
d --- large diameter external thread in the reference plane;
D2 --- internal thread within the reference plane of the pitch diameter;
d2 --- external thread in the reference plane of the path;
D1 --- internal thread within the reference plane trails;
d1 --- external thread within the reference plane trails;
n --- Number of teeth within the axial length of 25.4mm included;
P --- pitch;
H --- original height triangle;
h --- thread profile height;
f --- cutting depth;
L1 --- reference distance;
Effective thread length L2 --- external thread;
L3 --- assembly margin;
V --- pintail length.
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