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GB/T 41157.4-2022: Fasteners for nuclear power plants - Part 4: Nuts made of corrosion-resistant stainless steel
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Fasteners for nuclear power plants - Part 4: Nuts made of corrosion-resistant stainless steel
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GB/T 41157.4-2022
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Basic data | Standard ID | GB/T 41157.4-2022 (GB/T41157.4-2022) | | Description (Translated English) | Fasteners for nuclear power plants - Part 4: Nuts made of corrosion-resistant stainless steel | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J13 | | Word Count Estimation | 18,171 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 41157.4-2022: Fasteners for nuclear power plants - Part 4: Nuts made of corrosion-resistant stainless steel
---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.
Fasteners for nuclear power plants - Part 4.Nuts made of corrosion-resistant stainless steel
ICS 21.060.20
CCSJ13
National Standards of People's Republic of China
Fasteners for nuclear power plants
Part 4.Stainless Steel Nuts
Published on 2022-03-09
2022-10-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 2
4 Code 2
5 Technical requirements 2
6 Test method 5
7 Logo and packaging9
Appendix A (informative) Thread size of the test mandrel 10
Reference 12
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
drafted.
This document is part 4 of GB/T 41157 "Fasteners for Nuclear Power Plants". GB/T 41157 has published the following parts.
--- Part 1.Alloy steel bolts, screws and studs;
--- Part 2.Carbon steel and alloy steel nuts;
--- Part 3.Stainless steel bolts, screws and studs;
--- Part 4.Stainless steel nuts;
--- Part 5.Acceptance inspection.
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China Machinery Industry Federation.
This document is under the jurisdiction of the National Fastener Standardization Technical Committee (SAC/TC85).
This document is drafted by. China Machinery Productivity Promotion Center, Shaoxing Shannai High-Pressure Fastener Co., Ltd., Dingxi High-Strength Fastener Co., Ltd.
Co., Ltd., Zhejiang Dongming Stainless Steel Products Co., Ltd., Wuxi Tengchang Hardware Products Co., Ltd., Hebei Wuwei Avionics Technology Co., Ltd.
Company, Shandong Gaoqiang Fastener Co., Ltd., Zhejiang Haili Co., Ltd., Xinghua Yongzheng Stainless Steel Products Co., Ltd., Shanghai Qunlijin
Firmware Manufacturing Co., Ltd., Zhejiang National Inspection and Testing Technology Co., Ltd., General Parts Product Quality Supervision and Testing Center for Machinery Industry, Nuclear
Institute of Industrial Standardization, Tsinghua University, China Nuclear Power Engineering Co., Ltd., China General Nuclear Power Engineering Co., Ltd., China General Nuclear Power Research Institute Co., Ltd.,
China Nuclear Power Research and Design Institute, Shanghai Nuclear Engineering Research and Design Institute Co., Ltd., Suzhou Thermal Engineering Research Institute Co., Ltd., Guizhou Aerospace Precision Manufacturing Co., Ltd.
Manufacturing Co., Ltd., Wenzhou Xinde Electric Power Parts Co., Ltd.
This document is interpreted by the National Fastener Standardization Technical Committee.
Introduction
Fasteners are widely used in the safety systems and equipment of nuclear power plants, and undertake functions such as pressure sealing, component connection and support and fixation.
Quantity and performance play an important role in nuclear power plant safety systems and equipment performing nuclear safety functions. However, in nuclear power plant construction and equipment manufacturing
During the supervision process, it was found that there are weak links in the design, procurement, manufacture, installation and acceptance of nuclear power fasteners. GB/T 41157 "Nuclear Power
Factory Fasteners" aims to standardize the technical requirements and test methods for fasteners used in nuclear power plants, and consists of the following five parts.
--- Part 1.Alloy steel bolts, screws and studs;
--- Part 2.Carbon steel and alloy steel nuts;
--- Part 3.Stainless steel bolts, screws and studs;
--- Part 4.Stainless steel nuts;
--- Part 5.Acceptance inspection.
Fasteners for nuclear power plants
Part 4.Stainless Steel Nuts
1 Scope
This document specifies the technical requirements,
Test methods and marking and packaging at room temperature (10°C ~ 35°C).
Note 1.The product dimensions are specified in the corresponding product standards or drawings.
This document applies to grades 1, 2 and 3 stainless steel nuts.
a) manufactured from austenitic stainless steel (solution state), martensitic stainless steel or precipitation hardening stainless steel;
b) Ordinary threads complying with GB/T 192 and GB/T 196;
c) Coarse thread M5~M64, fine thread M8×1~M64×4;
d) Comply with the tolerances specified in GB/T 197 and GB/T 9145;
e) The diameter and pitch combination specified in GB/T 193;
f) of any shape.
This document does not specify the following performance requirements.
--- Effective torque type nut locking performance (see GB/T 3098.9);
--- Solderability.
The 1st, 2nd and 3rd grade stainless steel nuts for other reactor type nuclear power plants can also refer to this document.
Note 2.The applicable maximum operating temperature for fasteners produced in accordance with this document is 370 °C. When the operating temperature exceeds 370°C, it is recommended that the user consult the relevant experts
consult.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document.
GB/T 196 Basic dimensions of common thread
GB/T 197 Ordinary thread tolerance
GB/T 228.1 Tensile Test of Metallic Materials Part 1.Test Method at Room Temperature
GB/T 230.1 Rockwell hardness test of metallic materials - Part 1.Test method
GB/T 231.1 Brinell hardness test for metallic materials - Part 1.Test method
GB/T 3098.15 Fasteners Mechanical Properties Stainless Steel Nuts
GB/T 3103.1 Fastener Tolerance Bolts, Screws, Studs and Nuts
GB/T 4340.1 Vickers Hardness Test for Metal Materials Part 1.Test Methods
GB/T 5276 Fastener bolts, screws, studs and nuts dimension code and marking
GB/T 6394 Metal Average Grain Size Determination Method
GB/T 16825.1 Inspection of static uniaxial testing machines Part 1.Inspection and
calibration
NB/T.20003.4 Non-destructive testing of nuclear island machinery in nuclear power plants - Part 4.Penetrant testing
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