JB/T 6880.1-2013 PDF EnglishUS$370.00 · In stock · Download in 9 seconds
JB/T 6880.1-2013: Grey iron castings for pumps Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid JB/T 6880.1: Historical versions
Similar standardsJB/T 6880.1-2013: Grey iron castings for pumps---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JBT6880.1-2013JB MECHANICAL INDUSTRY STANDARD ICS 23.080 J 71 Filing No.. 44389-2014 Replacing JB/T 6880.1-1993 Grey iron castings for pumps Issued on. DECEMBER 31, 2013 Implemented on. JULY 01, 2014 Issued by. Ministry of Industry and Information Technology of PRC Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Designations... 5 5 Technical requirements... 5 6 Test methods... 10 7 Inspection rules... 11 8 Marking, packaging, storage, transportation of castings... 13 Appendix A (Normative) Welding repair of gray cast iron parts for pumps... 14ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces JB/T 6880.1-1993 "Grey iron castings for pumps". Compared with JB/T 6880.1-1993, the main technical changes are as follows. - MODIFY the scope (see Chapter 1; Chapter 1 of the 1993 edition); - ADD the standard GB/T 5116 (see Chapter 2); - DELETE GB/T 11350 (see Chapter 2; Chapter 2 of the 1993 edition); - ADD the terms and definitions (see Chapter 3). This standard was proposed by the China Machinery Industry Federation. This standard shall be under the jurisdiction of the National Pump Standardization Technical Committee (SAC/TC 211). The drafting organizations of this standard. Shanghai Liancheng (Group) Co., Ltd., Zhejiang Xinjie Pump Industry Co., Ltd., Fujian Lisong Metal Industry Co., Ltd., Shenyang Pump Research Institute. The main drafters of this standard. Song Qingsong, Xu Mintian, Ruan Tingchun, Luan Qiyi, Xu Weiliang, Zhang Wenda, Li Zhenyun. This standard replaces the standard previously issued as follows. - JB/T 6880.1-1993. Grey iron castings for pumps1 ScopeThis standard specifies the terms and definitions, designations, technical requirements, test methods, inspection rules, casting markings, packaging, storage and transportation requirements of gray iron castings for pumps (hereinafter referred to as castings). This standard applies to gray iron castings for pumps, which are cast in sand molds or molds with thermal conductivity equivalent to sand molds, where there are no special requirements for repair welding in drawings or other technical documents. Gray iron castings for pumps as cast in other molds can also be used for reference.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 5611 Foundry terminology GB/T 6060.1 Surface roughness comparison specimen - Part 1.Casting surface GB/T 6414-1999 Castings - System of dimensional tolerances and machining allowances GB/T 9439-2010 Gray iron castings GB/T 11351-1989 Mass tolerances for castings JB/T 5413 Acceptance specification for mixed and axial flow pumps with open blades JB/T 6879 Dimensional tolerances of wet surfaces in the castings of centrifugal pumps3 Terms and definitionsThe terms and definitions as defined in GB/T 5611, as well as the following terms and definitions, apply to this document.4 DesignationsThe cast iron designations shall comply with the provisions of Chapter 4 of GB/T 9439- 2010.5 Technical requirements5.1 Production method and chemical composition The production method and chemical composition shall comply with the provisions of 6.1 and 6.2 of GB/T 9439-2010. 5.4 Heat treatment Castings shall be subjected to stress relief annealing treatment. The specific requirements shall be agreed upon by the supplier and the buyer. 5.5 Geometric shape and size The geometric shape and size of the casting shall comply with the requirements of the drawing. 5.6 Dimensional tolerance 5.6.1 The dimensional tolerance of general parts shall not be less than that specified in Table 1; the tolerance zone shall be set symmetrically to the basic size of the casting. 5.7 Shift value The shift value of the casting shall be within the dimensional tolerance specified in Table 1.When the shift value is further restricted, it shall be indicated on the drawing. 5.8 Machining allowance The machining allowance of the casting shall comply with the provisions of GB/T 6414. The machining allowance grade can be selected based on the CT12 grade specified in Table 1, in accordance with the provisions of Chapter 10 of GB/T 6414-1999. 5.9 Weight tolerance 5.9.1 The weight tolerance of castings shall comply with the provisions of GB/T 11351- 1989.The weight tolerance grade of castings shall not be lower than MT13. 5.10 Surface quality 5.10.1 The surface roughness of castings, if not marked on the drawings, shall not be lower than the provisions of Table 2. 5.10.2 The flow-through surface roughness of the open blades of mixed flow pumps and axial flow pumps shall comply with the provisions of JB/T 5413. 5.11.4 The casting defects on the non-machined surface and machined surface of the casting shall not exceed the provisions of Table 3. 5.13 Repair of defects 5.13.1 When the defects of castings exceed the provisions of Table 3, welding repair is allowed if the strength and function of use can be ensured and the final accuracy of the pump parts will not be affected by the welding repair of the castings. Welding repair shall comply with the provisions of Appendix A.6 Test methods6.1 Test bars (blocks) and specimens The preparation of test bars (blocks) and specimens shall be carried out in accordance with the provisions of 8.2 of GB/T 9439-2010. 6.2 Mechanical properties test The tensile test shall be carried out in accordance with the provisions of 9.1 of GB/T 9439-2010. The hardness test shall be carried out in accordance with the provisions of 9.3 of GB/T 9439-2010. 6.3 Chemical analysis Chemical analysis shall be carried out in accordance with the provisions of 9.5 of GB/T 9439-2010. 6.4 Metallographic examination Metallographic examination shall be carried out in accordance with the provisions of 9.6 of GB/T 9439-2010. 6.5 Inspection of geometric shape and size Inspection of geometric shape and size of castings shall select inspection gauges of corresponding accuracy. For parts or related dimensions that cannot be directly inspected by gauges, templates or line-marking inspections may be used. 6.6 Nominal weight The method for determining the nominal weight of castings shall comply with the provisions of 3.2 of GB/T 11351-1989. 6.7 Surface quality The surface quality of castings shall be carried out in accordance with the provisions of 7.7 of GB/T 9439-2010. 6.8 Casting defects The inspection of casting defects shall be carried out in accordance with the provisions of 7.8 of GB/T 9439-2010. 6.10 Inspection of defect welding repair The inspection of welding repair of casting defects shall comply with the provisions of Appendix A.7 Inspection rules7.1 Inspection rights The inspection rights shall be carried out in accordance with the provisions of 10.1 of GB/T 9439-2010. 7.4 Inspection items The inspection items are. 7.6 Inspection of geometric shape and size The geometric shape and size of the casting shall be inspected according to the drawings. The first batch of castings and important parts shall be inspected piece by piece according to the drawings. General castings and castings produced by the method of ensuring dimensional stability can be spot checked; the sampling method shall be agreed upon by the supplier and the buyer. 7.8 Shift value The shift value shall be inspected piece by piece according to the requirements of 5.7. 7.9 Machining allowance The machining allowance shall be inspected according to the requirements of 5.8.The inspection rules shall be implemented in accordance with the provisions of 7.6. 7.10 Weight The weight and weight tolerance of castings shall be spot checked in accordance with the requirements of 5.9. 7.15 Acceptance Items If there are no special requirements, only the following items shall be accepted.8 Marking, packaging, storage, transportation of castingsThe marking, packaging, storage, transportation of castings shall comply with the provisions of Chapter 11 of GB/T 9439-2010. JB/T 6880.1-2013 JB MECHANICAL INDUSTRY STANDARD ICS 23.080 J 71 Filing No.. 44389-2014 Replacing JB/T 6880.1-1993 Grey iron castings for pumps Issued on. DECEMBER 31, 2013 Implemented on. JULY 01, 2014 Issued by. Ministry of Industry and Information Technology of PRCTable of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Designations... 5 5 Technical requirements... 5 6 Test methods... 10 7 Inspection rules... 11 8 Marking, packaging, storage, transportation of castings... 13 Appendix A (Normative) Welding repair of gray cast iron parts for pumps... 14ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces JB/T 6880.1-1993 "Grey iron castings for pumps". Compared with JB/T 6880.1-1993, the main technical changes are as follows. - MODIFY the scope (see Chapter 1; Chapter 1 of the 1993 edition); - ADD the standard GB/T 5116 (see Chapter 2); - DELETE GB/T 11350 (see Chapter 2; Chapter 2 of the 1993 edition); - ADD the terms and definitions (see Chapter 3). This standard was proposed by the China Machinery Industry Federation. This standard shall be under the jurisdiction of the National Pump Standardization Technical Committee (SAC/TC 211). The drafting organizations of this standard. Shanghai Liancheng (Group) Co., Ltd., Zhejiang Xinjie Pump Industry Co., Ltd., Fujian Lisong Metal Industry Co., Ltd., Shenyang Pump Research Institute. The main drafters of this standard. Song Qingsong, Xu Mintian, Ruan Tingchun, Luan Qiyi, Xu Weiliang, Zhang Wenda, Li Zhenyun. This standard replaces the standard previously issued as follows. - JB/T 6880.1-1993. Grey iron castings for pumps1 ScopeThis standard specifies the terms and definitions, designations, technical requirements, test methods, inspection rules, casting markings, packaging, storage and transportation requirements of gray iron castings for pumps (hereinafter referred to as castings). This standard applies to gray iron castings for pumps, which are cast in sand molds or molds with thermal conductivity equivalent to sand molds, where there are no special requirements for repair welding in drawings or other technical documents. Gray iron castings for pumps as cast in other molds can also be used for reference.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 5611 Foundry terminology GB/T 6060.1 Surface roughness comparison specimen - Part 1.Casting surface GB/T 6414-1999 Castings - System of dimensional tolerances and machining allowances GB/T 9439-2010 Gray iron castings GB/T 11351-1989 Mass tolerances for castings JB/T 5413 Acceptance specification for mixed and axial flow pumps with open blades JB/T 6879 Dimensional tolerances of wet surfaces in the castings of centrifugal pumps3 Terms and definitionsThe terms and definitions as defined in GB/T 5611, as well as the following terms and definitions, apply to this document.4 DesignationsThe cast iron designations shall comply with the provisions of Chapter 4 of GB/T 9439- 2010.5 Technical requirements5.1 Production method and chemical composition The production method and chemical composition shall comply with the provisions of 6.1 and 6.2 of GB/T 9439-2010. 5.4 Heat treatment Castings shall be subjected to stress relief annealing treatment. The specific requirements shall be agreed upon by the supplier and the buyer. 5.5 Geometric shape and size The geometric shape and size of the casting shall comply with the requirements of the drawing. 5.6 Dimensional tolerance 5.6.1 The dimensional tolerance of general parts shall not be less than that specified in Table 1; the tolerance zone shall be set symmetrically to the basic size of the casting. 5.7 Shift value The shift value of the casting shall be within the dimensional tolerance specified in Table 1.When the shift value is further restricted, it shall be indicated on the drawing. 5.8 Machining allowance The machining allowance of the casting shall comply with the provisions of GB/T 6414. The machining allowance grade can be selected based on the CT12 grade specified in Table 1, in accordance with the provisions of Chapter 10 of GB/T 6414-1999. 5.9 Weight tolerance 5.9.1 The weight tolerance of castings shall comply with the provisions of GB/T 11351- 1989.The weight tolerance grade of castings shall not be lower than MT13. 5.10 Surface quality 5.10.1 The surface roughness of castings, if not marked on the drawings, shall not be lower than the provisions of Table 2. 5.10.2 The flow-through surface roughness of the open blades of mixed flow pumps and axial flow pumps shall comply with the provisions of JB/T 5413. 5.11.4 The casting defects on the non-machined surface and machined surface of the casting shall not exceed the provisions of Table 3. 5.13 Repair of defects 5.13.1 When the defects of castings exceed the provisions of Table 3, welding repair is allowed if the strength and function of use can be ensured and the final accuracy of the pump parts will not be affected by the welding repair of the castings. Welding repair shall comply with the provisions of Appendix A.6 Test methods6.1 Test bars (blocks) and specimens The preparation of test bars (blocks) and specimens shall be carried out in accordance with the provisions of 8.2 of GB/T 9439-2010. 6.2 Mechanical properties test The tensile test shall be carried out in accordance with the provisions of 9.1 of GB/T 9439-2010. The hardness test shall be carried out in accordance with the provisions of 9.3 of GB/T 9439-2010. 6.3 Chemical analysis Chemical analysis shall be carried out in accordance with the provisions of 9.5 of GB/T 9439-2010. 6.4 Metallographic examination Metallographic examination shall be carried out in accordance with the provisions of 9.6 of GB/T 9439-2010. 6.5 Inspection of geometric shape and size Inspection of geometric shape and size of castings shall select inspection gauges of corresponding accuracy. For parts or related dimensions that cannot be directly inspected by gauges, templates or line-marking inspections may be used. 6.6 Nominal weight The method for determining the nominal weight of castings shall comply with the provisions of 3.2 of GB/T 11351-1989. 6.7 Surface quality The surface quality of castings shall be carried out in accordance with the provisions of 7.7 of GB/T 9439-2010. 6.8 Casting defects The inspection of casting defects shall be carried out in accordance with the provisions of 7.8 of GB/T 9439-2010. 6.10 Inspection of defect welding repair The inspection of welding repair of casting defects shall comply with the provisions of Appendix A.7 Inspection rules7.1 Inspection rights The inspection rights shall be carried out in accordance with the provisions of 10.1 of GB/T 9439-2010. 7.4 Inspection items The inspection items are. 7.6 Inspection of geometric shape and size The geometric shape and size of the casting shall be inspected according to the drawings. The first batch of castings and important parts shall be inspected piece by piece according to the drawings. General castings and castings produced by the method of ensuring dimensional stability can be spot checked; the sampling method shall be agreed upon by the supplier and the buyer. 7.8 Shift value The shift value shall be inspected piece by piece according to the requirements of 5.7. 7.9 Machining allowance The machining allowance shall be inspected according to the requirements of 5.8.The inspection rules shall be implemented in accordance with the provisions of 7.6. 7.10 Weight The weight and weight tolerance of castings shall be spot checked in accordance with the requirements of 5.9. 7.15 Acceptance Items If there are no special requirements, only the following items shall be accepted.8 Marking, packaging, storage, transportation of castingsThe marking, packaging, storage, transportation of castings shall comply with the provisions of Chapter 11 of GB/T 9439-2010. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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