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GB/T 14383-2021 English PDF

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GB/T 14383-2021: [Including 2025XG1] Forged fittings, socket-welding and threaded
Status: Valid

GB/T 14383: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 14383-2021English789 Add to Cart 6 days [Need to translate] [Including 2025XG1] Forged fittings, socket-welding and threaded Valid GB/T 14383-2021
GB/T 14383-2008English879 Add to Cart 4 days [Need to translate] Forged fittings, socket-welding and threaded Obsolete GB/T 14383-2008
GB/T 14383-1993English559 Add to Cart 4 days [Need to translate] Forged steel socket welding pipe fittings Obsolete GB/T 14383-1993

PDF similar to GB/T 14383-2021


Standard similar to GB/T 14383-2021

GB/T 12385   GB/T 13401   GB/T 17185   GB/T 14382   

Basic data

Standard ID GB/T 14383-2021 (GB/T14383-2021)
Description (Translated English) Forged fittings, socket-welding and threaded
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J15
Word Count Estimation 38,348
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 14383-2021: Forged fittings, socket-welding and threaded

---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.
Forged fittings, socket-welding and threaded ICS 23.040.60 J15 National Standards of People's Republic of China Replace GB/T 14383-2008 Forged socket welding and threaded pipe fittings Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅰ 1 Scope 1 2 Normative references 1 3 Variety and code 2 4 Pressure rating 3 5 Special connection form 3 6 Take over size 3 7 Ordering content 3 8 Shape, size and tolerance 4 9 Material 15 10 Manufacturing 19 11 Heat treatment 19 12 Inspection and test 19 13 Sign 23 14 Surface protection and packaging 24 15 Product quality certificate 24

Appendix A

(Normative appendix) Size of steel pipe connected with pipe fittings 25

Appendix B

(Normative appendix) Additional requirements 27

Appendix C

(Informative appendix) Commonly used raw materials for pipe fittings 30

Appendix D

(Informative appendix) Inspection and test summary table 33 Reference 35

Foreword

This standard is in accordance with GB/T Drafting of the rules given in 1.1-2009. This standard replaces GB/T 14383-2008 "Forged Socket Welding and Threaded Pipe Fittings", with GB/T Compared with 14383-2008, except for editability In addition to the modification, the main technical changes are as follows. ---The variety of pipe fittings has been added (see Table 1); ---Added the eccentricity requirements for eccentric reducing pipe fittings (see 8.4.3); ---Modified the practice of using raw material grades as the material grades of pipe fittings, and established pipe fittings that are compatible with the material system of butt-welded pipe fittings Material grade (see 9.1, 9.2 in.2008 edition); ---Modified the content of heat treatment (see Chapter 11, Chapter 11 of the.2008 edition); ---Modified part of the content and parameters of inspection and test (see Chapter 12, Chapter 12 and Chapter 13 of the.2008 edition); ---Deleted the provisions of the verification test (see 13.2 of the.2008 edition); ---Modified the content of the logo (see Chapter 13, Chapter 14 of the.2008 edition); ---Modified the content of the product quality certificate (see Chapter 15, Chapter 16 of the.2008 edition); ---Modified the outer diameter of some steel pipes (see Appendix A, Appendix B of the.2008 edition); --- Deleted this standard and ASME B16.11..2005 chapter number comparison table (see Appendix A of the.2008 edition); ---Modified the content of additional requirements (see Appendix B, Appendix C of the.2008 edition); ---The appendix of commonly used raw materials has been added (see Appendix C). This standard was proposed by the China Machinery Industry Federation. This standard is approved by the National Technical Committee for Pipeline Accessories Standardization (SAC/TC 237) Concentration. Drafting organizations of this standard. Jiangsu Haida Pipe Fittings Group Co., Ltd., Jiangyin South Pipe Fittings Manufacturing Co., Ltd., China Machinery Productivity Promotion Xin, Jiangyin Jintong Petrochemical Equipment Co., Ltd., Jiangsu Fugit Pipe Industry Co., Ltd., East China Design Branch of China Petroleum Engineering and Construction Corporation, China Tianchen Engineering Co., Ltd., Wuxi Xinfeng Pipe Industry Co., Ltd., Yangzhou Pipe Fittings Factory Co., Ltd., Hebei Canghai Nuclear Equipment Technology Co., Ltd. Co., Ltd., Changzhou Wujin Power Pipe Fitting Co., Ltd., Zhejiang Jiuli Special Material Technology Co., Ltd., Suzhou Yuli Pipe Industry Co., Ltd. The main drafters of this standard. Guo Shunxian, Li Jinxi, Feng Feng, Yao Minghua, Li Naiming, Liu Hongfu, Liu Jianxin, Zhang Xiujie, Lu Hengping, Meng Qingyun, Zang Zhiwei, Zhang Xinyue, Li Jian, Shen Yufeng. The previous editions of the standard replaced by this standard are as follows. ---GB/T 14383-1993, GB/T 14383-2008. Forged socket welding and threaded pipe fittings

1 Scope

This standard specifies the varieties and codes of forged socket welding and threaded pipe fittings, pressure grades, special connection forms, pipe sizes, and within the order Capacity, shape, dimensions and tolerances, materials, manufacturing, heat treatment, inspection and testing, marking, surface protection and packaging, and product quality certificates Requirements. This standard applies to piping systems whose nominal size is less than or equal to DN 100, the pressure class (Class) is 2 000, 3 000, 6 000 and 000 steel material forged socket welding and threaded pipe fittings.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T The allowable deviation of the chemical composition of the finished product of 222 steel GB/T 223 (all parts) Steel and alloy chemical analysis methods GB/T 226 Steel Macrostructure and Defect Inspection Method GB/T 228.1 Tensile test of metallic materials Part 1.Room temperature test method GB/T 228.2 Tensile test of metallic materials Part 2.High temperature test method GB/T 229 Charpy pendulum impact test method for metallic materials GB/T 231 (all parts) Brinell hardness test of metallic materials GB/T 2975 steel and steel product mechanical performance test sampling location and sample preparation GB/T 4334 Corrosion of metals and alloys Austenitic and ferritic-austenite (duplex) stainless steel intergranular corrosion test method GB/T 4336 Carbon steel and medium and low alloy steels. Determination of multi-element content. Spark discharge atomic emission spectrometry (conventional method) GB/T 6394 Method for determination of average grain size of metals GB/T 9452 Method for measuring effective heating zone of heat treatment furnace GB/T 10561 Determination of the content of non-metallic inclusions in steel Standard Grading Chart Microscopic Inspection Method GB/T 11170 Stainless steel. Determination of multi-element content. Spark discharge atomic emission spectrometry (conventional method) GB/T 12716 60° sealed pipe thread GB/T Metallographic determination of α-phase area content in 13305 stainless steel GB/T 13401 Technical Specification for Steel Butt Welding Pipe Fittings GB/T 17394 (all parts) Leeb hardness test of metallic materials GB/T 17897 Corrosion of metals and alloys Stainless steel ferric chloride pitting corrosion test method GB/T 18253-2018 Types of inspection documents for steel and steel products GB/T 20801.2 Pressure Piping Specification Industrial Piping Part 2.Materials NB/T 47013.3 Non-destructive testing of pressure equipment-Part 3.Ultrasonic testing NB/T 47013.4 Non-destructive testing of pressure equipment Part 4.Magnetic particle testing NB/T 47013.5 Non-destructive testing of pressure equipment-Part 5.Penetration testing

3 Variety and code

The varieties and codes of pipe fittings are shown in Table 1.

4 Pressure rating

The pressure class (Class) of socket welded pipe fittings is 3 000, 6 000 or 9 000, the pressure rating of threaded pipe fittings is 2 000, 3 000 or 000.The pressure rating of this standard is only related to the corresponding steel pipe wall thickness (see Appendix A), and the corresponding relationship between the two is shown in Table 2.

2 The relationship between the pressure rating of the pipe fittings and the corresponding steel pipe wall thickness

5 Special connection form

5.1 The pipe fittings can be made into the end connection form of socket welding and thread combination. For the end connection form of this combination, it should be compared according to Table 2. The end of the low pressure grade determines the pressure grade of the pipe fitting. 5.2 With the agreement of the supplier and the demander, pipe fittings with other thread forms or other connection forms can be made; in addition, the pipe fittings should comply with other terms Provisions.

6 Take over size

6.1 See Appendix A for the dimensions of steel pipes connected with pipe fittings. The outer diameter of the steel pipe is divided into two series, I and II, and the outer diameter of I series is recommended. Elected When using the Ⅱ series outer diameter, you should add Ⅱ in the order content, and the manufacturer should determine the socket hole and the flow hole according to the Ⅱ series outer diameter; in addition, The remaining dimensions of the pipe fittings should meet the requirements of this standard. 6.2 The outer diameter of Ⅱ series is not suitable for threaded pipe fittings.

7 Order content

The purchaser shall provide all the information required for the purchase of goods in the order. This information shall include but not limited to the following. ---Variety or code (including special connection form requirements); ---Material grade; ---Pressure Level; ---Nominal size (the outer diameter of series Ⅰ does not need to be added, and the outer diameter of series Ⅱ should be marked with Ⅱ) or thread size code; thread sub-sections should also be marked with length Degree type code; ---No. of this standard; ---Number of pieces; ---Additional requirements (see Appendix B) or supplementary regulations required. 8 Shape, size and tolerance 8.1 Shape and size 8.1.1 After the forged fillet of the end flange of the socket welded pipe fitting is processed by the end plane, the required welding plane width and the required welding The gap before connection is shown in Figure 1.

1 Required minimum welding plane width and gap before welding

8.1.2 The shape of socket welding elbows, tees and crosses shall meet the requirements of Figure 2, and the dimensions shall meet the requirements of Table 3; socket welding pipe hoops and caps The shape should meet the requirements of Figure 3, and the size should meet the requirements of Table 4; the shape of the socket welded 45° tee should meet the requirements of Figure 4, and the size should meet the requirements of Figure 4. Conform to the provisions of Table 5. 8.1.3 The end plane of socket welded pipe fittings should be perpendicular to the axial direction of the socket. 8.1.4 The shape of threaded elbows, tees and crosses shall meet the requirements of Figure 5, and the dimensions shall meet the requirements of Table 6. The shape should meet the requirements of Figure 6, and the size should meet the requirements of Table 7; the shape of the threaded pipe hoop and cap should meet the requirements of Figure 7, and the size should meet the requirements of Figure 7. Meet the requirements of Table 8; the shape of the threaded pipe plug and the internal and external threaded joints should meet the requirements of Figure 8, and the size should meet the requirements of Table 9; the hexagonal double screw The shape of the threaded joint and the threaded sub-section should meet the requirements of Figure 9, and the size should meet the requirements of Table 10. 8.1.5 The thread of threaded pipe fittings shall comply with GB/T 12716 60° tapered pipe thread (NPT) requirements. The thread sub-sections are divided into W-1, W- 2 and W-3 three length types. 8.1.6 The threaded ends of pipe fittings should be chamfered. --- For internal threads, the chamfer diameter should not be greater than the major diameter of the thread, and the depth should not be less than one-half of the thread pitch, and it should be about the same as the thread axis. An angle of 45°; ---For external threads, the chamfer should be an included angle of 30°~45° with the thread axis; ---All chamfers should be coaxial with the thread. Note. The measured thread length specified in the relevant table includes the depth of the chamfer. 8.2 Tolerance 8.2.1 Tolerances should meet the requirements of Table 11. 8.2.2 The socket aperture and the flow aperture of the socket welded pipe fittings shall be coaxial, and the coaxiality tolerance shall be 0.8 mm. The two opposite sockets should be the same Shaft, its coaxiality tolerance is 1.5 mm. 8.2.3 The axis of the socket hole diameter and the flow hole diameter of the socket welded pipe fittings shall be coincident, and the maximum allowable value of its straightness is.200 mm within 1 mm. The flow aperture of threaded pipe fittings should coincide with the axis of the thread, and the maximum allowable value of its straightness is.200 mm within 1 mm. 8.3 End flange The end flanges of elbows, tees and crosses in socket welding and threaded pipe fittings should be as shown in Figure 2, Figure 4 or Figure 5.

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