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GB/T 25715-2023 English PDF

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Q: Should I purchase the latest version GB/T 25715-2023?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 25715-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$349.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 25715-2023: Pipe mould for centrifugal ductile iron pipe
Status: Valid

GB/T 25715: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25715-2023	349	Add to Cart	4 days	Pipe mould for centrifugal ductile iron pipe	Valid
GB/T 25715-2010	479	Add to Cart	3 days	Sphere nodular cast pipe mold finish machining project	Obsolete

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GB/T 39957 GB/T 37371 GB/T 37365 GB/T 25711 GB/T 25716

Basic data

Standard ID: GB/T 25715-2023 (GB/T25715-2023)
Description (Translated English): Pipe mould for centrifugal ductile iron pipe
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J61
Classification of International Standard: 25.120.30
Word Count Estimation: 17,113
Date of Issue: 2023-11-27
Date of Implementation: 2024-06-01
Older Standard (superseded by this standard): GB/T 25715-2010
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 25715-2023: Pipe mould for centrifugal ductile iron pipe

---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.
ICS 25:120:30 CCSJ61 National Standards of People's Republic of China Replace GB/T 25715-2010 Pipe mold for centrifugally cast ductile iron pipe Published on 2023-11-27 2024-06-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Specifications, structural types and dimensional tolerances 2 4:1 Specification 2 4:2 Structural type 2 4:3 Dimensional tolerance 4 5 Technical requirements 5 5:1 General requirements 5 5:2 Chemical composition 5 5:3 Mechanical properties 5 5:4 Low magnification tissue 6 5:5 Metallographic structure 6 5:6 Non-destructive testing 6 5:7 Dimensional accuracy 6 5:8 Service life 6 6 Test methods 7 6:1 Chemical composition 7 6:2 Mechanical properties 7 6:3 Low magnification tissue 7 6:4 Metallographic structure 7 6:5 Non-destructive testing 7 6:6 Dimensional accuracy 7 6:7 Service life 7 7 Inspection Rules 8 7:1 Inspection classification 8 7:2 Factory inspection 8 7:3 Type inspection 8 8 Marking, packaging, transportation and storage 9 8:1 Logo 9 8:2 Packaging 9 8:3 Transport 9 8:4 Storage 9 Appendix A (normative) The total number of ductile iron pipes that can be produced by the pipe mold (life span) 10 Reference 11 Figure 1 Schematic diagram of typical structure of water-cooled metal pipe mold 3 Figure 2 Schematic diagram of the typical structure of the hot mold coating metal pipe mold 4 Table 1 Main specifications of pipe mold 2 Table 2 Main dimensional tolerances 5 Table 3 Chemical composition 5 Table 4 Mechanical properties 6 Table 5 Inspection items, sampling (sampling) parts and quantities 8 Table A:1 The total number of ductile iron pipes that can be produced by the pipe mold (life span) 10

Foreword

This document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting: This document replaces GB/T 25715-2010 "Centrifugal Ductile Cast Pipe Mold": Compared with GB 25715-2010, this document has In addition to general and editorial changes, the main technical changes are as follows: ---Changed the content and scope of application of this document (see Chapter 1, Chapter 1 of the:2010 edition); ---Deleted the terms "ductile iron", "socket" and "socket" (see Chapter 3 of the:2010 edition), and added "pipe mold" and "water-cooled metal pipe" Terms and definitions of "mold" and "hot mold coating type metal pipe mold" (see Chapter 3); ---Changed the main specifications of the pipe mold (see Table 1, Table 1 of the:2010 version); ---Changed the dimensional tolerances of some specifications of pipe molds (see Table 2, Table 2 of the:2010 version); ---The structural diagram of the pipe mold has been changed, and the typical structural diagram of the hot mold coating type metal pipe mold has been added (see Figure 1, Figure 2,:2010 version of Figure 1); ---Change "smelting method" to "overall requirements", and add relevant regulations on forging steel ingots, forging ratio, and forging blank margin (see 5:1,:2010 version of 5:2:1); ---Deleted the material grade (see Table 3 of the:2010 version); ---Added gas content requirements for three chemical components: hydrogen, oxygen, and nitrogen (see Table 3); ---Changed the chemical composition tolerance requirements (see 5:2:2, Table 4 of the:2010 version); ---Changed the tensile strength, yield strength, elongation after break, shrinkage of area, impact energy, and hardness of the pipe mold blank after quenching and tempering heat treatment Index values of mechanical properties, and requirements for hardness difference (see Table 4, Table 5 of the:2010 edition); ---Changed the standards and level requirements that low-magnification tissue should comply with (see 5:4, 5:2:3:2 and 5:2:3:3 of the:2010 edition); ---Deleted the inspection requirements for some high-magnification structures in metallographic structures (see 5:2:3:4 of the:2010 edition); ---Changed the levels and requirements for non-metallic inclusions in pipe mold specimens (see 5:5:1, 5:2:4 of the:2010 edition); --- Added requirements for grain size and structure after quenching and tempering (see 5:5:2, 5:5:3); ---Changed the assessment standards and quality levels performed by magnetic particle testing (see 5:6:2, 5:2:5 of the:2010 version); ---Changed the assessment standards and quality levels for ultrasonic testing (see 5:6:3, 5:2:5 of the:2010 version); ---Deleted the regulations on the overall dimensions, delivery status, and marking of the pipe mold blank (see 5:2:6, 5:2:7, and 5:2:8 of the:2010 edition); ---Changed the requirements for dimensional accuracy (see 5:7, 5:3:1 of the:2010 edition); ---Changed the requirements for the service life of the finished pipe mold (see 5:8, 5:3:4 of the:2010 edition); ---Changed the relevant detection methods for the chemical composition of pipe molds (see 6:1,:2010 version of 6:1); ---Changed the sampling position of the mechanical property test specimen of the pipe mold (see 6:2:1, 5:2:2:1 of the:2010 version); --- Added requirements for hardness inspection locations (see 6:2:3); ---Added inspection methods for grain size and metallographic structure (see 6:4:2, 6:4:3); ---Changed the requirements for surface roughness of pipe molds (see 6:5:1, 5:3:2:1 of the:2010 edition); ---Added the requirements for the magnetic particle inspection position of the pipe mold (see 6:5:2); ---Changed the test method for dimensional accuracy (see 6:6,:2010 version of 6:6); ---Added the method for measuring the radial runout and coaxiality of the pipe mold (see 6:6:2); ---Changed the requirements for the marking, packaging, transportation and storage of pipe molds (see Chapter 8, Chapter 8 of the:2010 edition): Please note that some content in this document may be subject to patents: The publisher 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 Foundry Machinery Standardization Technical Committee (SAC/TC186): This document was drafted by: Tongyu Heavy Industry Co:, Ltd:, Shandong Institute of Standardization, Guoming Cast Pipe Co:, Ltd:, Shenyang Yate Heavy Equipment Manufacturing Co:, Ltd:, Nan'an Zhongji Standardization Research Institute Co:, Ltd:, Shanxi Duozhi Pipe Mold Manufacturing Co:, Ltd:, Fujian Minxuan Technology Co:, Ltd:, Jinan Casting and Forging Institute Inspection and Testing Technology Co:, Ltd:, Qingdao Zhongzhida Environmental Protection Melting Equipment Co:, Ltd:, CTI Testing Certification Group Co:, Ltd:, Qingdao Antai Heavy Industry Machinery Co:, Ltd:, Qingdao Sanrui Machinery Manufacturing Co:, Ltd:, Weihai Gongyou Casting Machinery Co:, Ltd:, Shandong Jiechuang Machinery Co:, Ltd:, Qingdao Qingli Environmental Protection Equipment Co:, Ltd:, Qingdao Kaijie Heavy Industry Machinery Co:, Ltd:, Qingdao Huihong Liangtai Intelligent Equipment Co:, Ltd: The main drafters of this document: Liu Baogang, Liu Chunxia, Cao Zhiyong, Sun Yuting, Wei Wenwu, Xu Chunhong, Zhang Xuelai, Sun Wei, Sun Xin, Ke Zhenzhen, Ren Li, Gao Niansheng, Song Lijuan, Yang Houlei, Guo Tongtong, Wang Lu, Wang Zhengqiang, Huang Baohui, Chen Huiling, Li Chen, Wang Hua, Duan Jinting, Cao Xuefeng, Wang Qingfeng, Yan Zuoxiu, Zhao Peng, Hou Yongzhen, Zhao Zhikun, Su Liguo, Chen Liang, Nie Yuhan: This document was first published in:2010 and this is the first revision: Pipe mold for centrifugally cast ductile iron pipe

1 Scope

This document specifies the specifications, structural types, dimensions of water-cooled metal pipe molds and hot-mold paint-type metal pipe molds for centrifugally cast ductile iron pipes: dimensional tolerance, chemical composition, mechanical properties, low-magnification structure, metallographic structure, non-destructive testing and dimensional accuracy, and describes the corresponding test methods, inspection inspection rules, labeling, packaging, transportation and storage: This document is applicable to the design, manufacture and acceptance of pipe molds for centrifugally cast ductile iron pipes made of alloy steel:

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document: GB/T 222 Allowable deviations in chemical composition of finished steel products GB/T 223:82 Determination of hydrogen content in steel and iron by inert gas melting-thermal conductivity or infrared method GB/T 226 Acid etching inspection method for low magnification structure and defects of steel GB/T 228:1 Tensile testing of metallic materials Part 1: Room temperature test methods GB/T 229 Charpy pendulum impact test method for metal materials GB/T 231:1 Brinell hardness test of metallic materials Part 1: Test method GB/T 1184-1996 Shape and position tolerances No tolerance values noted GB/T 1804-2000 General tolerances Tolerances for linear and angular dimensions without tolerances noted GB/T 1979-2001 Low-magnification structural defect rating chart of structural steel GB/T 4336 Determination of multi-element content in carbon steel and medium-low alloy steel Spark discharge atomic emission spectrometry (conventional method) GB/T 6394-2017 Method for determination of average grain size of metals GB/T 10561-2005 Standard rating chart microscopic examination method for determination of non-metallic inclusion content in steel GB/T 11261 Determination of oxygen content in iron and steel by pulse heating inert gas melting-infrared absorption method GB/T 13295 Ductile iron pipes, fittings and accessories for water and gas GB/T 13320 Metallographic structure rating diagram and assessment method of steel die forgings GB/T 13384-2008 General technical conditions for mechanical and electrical product packaging GB/T 20066 Methods for sampling and preparation of samples for determination of chemical composition of steel and iron GB/T 20124 Determination of nitrogen content in iron and steel - Inert gas melting thermal conductivity method (conventional method) GB/T 37400:15-2019 General technical conditions for heavy machinery Part 15: Non-destructive testing of forged steel parts

3 Terms and definitions

The terms and definitions defined in GB/T 13295 and the following apply to this document: 3:1 pipe mold pipemould Molds used to produce centrifugal ductile iron pipes: ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 25715-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 25715-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 25715-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 25715-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 25715-2023?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 25715-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.