GB/T 37400.7-2019 English PDF

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GB/T 37400.7-2019: Heavy mechanical general technical specification -- Part 7: Repair welding for steel castings
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 37400.7-2019	228	Add to Cart	1 days	Heavy mechanical general technical specification -- Part 7: Repair welding for steel castings	Valid

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GB/T 38223   GB/T 38440   GB/T 37682   GB/T 37400.1   GB/T 37400.12   GB/T 37400.11   

Basic data

Standard ID: GB/T 37400.7-2019 (GB/T37400.7-2019)
Description (Translated English): Heavy mechanical general technical specification -- Part 7: Repair welding for steel castings
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J31
Classification of International Standard: 77.140.80
Word Count Estimation: 14,166
Date of Issue: 2019-08-30
Date of Implementation: 2020-03-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 37400.7-2019: Heavy mechanical general technical specification -- Part 7: Repair welding for steel castings

---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.
Heavy mechanical general technical specification - Part 7. Repair welding for steel castings ICS 77.140.80 J31 National Standards of People's Republic of China General technical conditions for heavy machinery Part 7. Repair welding of steel castings Part 7. Repairweldingforsteelcastings Published on.2019-08-30 2020-03-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword III 1 Scope 1 2 Normative references 1 3 repair welding defect range 1 4 Pre-weld preparation technical requirements 1 5 repair welding technical requirements 6 6 Post-weld stress relief annealing treatment 6 7 test 7 Appendix A (Normative Appendix) Supplementary Provision 8 Appendix B (Normative Appendix) Assessment of welds 9

Foreword

GB/T 37400 "General Technical Conditions for Heavy Machinery" is divided into 16 parts. --- Part 1. Product inspection; --- Part 2. Flame cutting parts; ---Part 3. Welded parts; ---Part 4. Cast iron parts; ---Part 5. Non-ferrous metal castings; ---Part 6. Steel castings; ---Part 7. Repair welding of steel castings; ---Part 8. Forgings; ---Part 9. Machining parts; --- Part 10. Assembly; --- Part 11. piping; --- Part 12. Painting; --- Part 13. Packaging; ---Part 14. Non-destructive testing of steel castings; ---Part 15. Non-destructive testing of forged steel parts; --- Part 16. Hydraulic system. This part is part 7 of GB/T 37400. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part was proposed by the China Machinery Industry Federation. This part is under the jurisdiction of the National Large-scale Casting and Forging Standardization Technical Committee (SAC/TC506) and the National Metallurgical Equipment Standardization Technical Committee. Will (SAC/TC409) deputy. This section drafted by. Shenyang Casting and Forging Industry Co., Ltd., Erzhong (Deyang) Heavy Equipment Co., Ltd., Taiyuan Heavy Machinery Group Engineering Technology Development Co., Ltd., Changzhou Baoling Heavy Industry Machinery Co., Ltd., Qinhuangdao Qinye Heavy Industry Co., Ltd., China Yizhong Group Co., Ltd., Heavy Group Dalian Engineering Technology Co., Ltd., China Heavy Machinery Research Institute Co., Ltd. The main drafters of this section. Yao Dayong, Yang Shuwen, Liu Hongsheng, Kang Wen, He Yang, Xie Junhu, Liang Yanbin, Kong Nianrong, Chen Xiaoguang, E Yongbo, Li Xuemin, Su Jing, Yan Ying, Zhu Guomin, Huang Jiarui, Wu Dongjun, Liu Zhen. General technical conditions for heavy machinery Part 7. Repair welding of steel castings

1 Scope

This part of GB/T 37400 stipulates the defect range of repair welding of steel castings, technical requirements for pre-weld preparation, technical requirements for repair welding, and after welding. Stress annealing treatment and inspection. This section applies to the repair welding of carbon steel, low alloy steel and high manganese steel casting steel parts before finishing.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 984 surfacing electrode GB/T 5117 non-alloy steel and fine-grain steel electrode GB/T 5118 heat-strength steel electrode GB/T 5680 austenitic manganese steel casting GB/T 6417.1 metal fusion welding head defect classification and description GB/T 8110 carbon steel, low alloy steel welding wire for gas shielded arc welding GB/T 10045 non-alloy steel and fine grain steel flux cored wire GB/T 15169 steel fusion welding welder skill assessment GB/T 17493 heat-strength steel flux cored wire GB/T 37400.6 General technical requirements for heavy machinery - Part 6. Steel castings JB/T 3223 Welding Material Quality Management Procedures JB/T 6404 large high manganese steel casting technical conditions NB/T 47014 Pressure welding equipment welding process evaluation

3 repair welding defect range

3.1 The scope of defects refers to defects that exceed the dimensional tolerances of the design drawings, exceed the allowable dimensions of the defects, and are not permitted. 3.2 Repairs that meet the following conditions shall not be repaired. a) sand holes, slag inclusions and looseness that cannot be removed; b) by machining, it can meet the technical requirements or allowable defects of the pattern; c) defects found in the process of processing that cannot meet the requirements of the product after repair welding; d) Defects other than repair welding are allowed after processing and the user does not agree with the defects of repair welding. 4 Pre-weld preparation technical requirements 4.1 Defect cleaning and groove form 4.1.1 The defects shall be thoroughly removed before repair welding, and the groove surface shall be smooth and smooth, and no sharp corners shall be present. 4.1.2 According to the defects of steel castings, the defects in the repair welding area can be shovel, grinding, carbon arc gouging, gas cutting or machining. ......

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