GB/T 13343-2008 PDF EnglishUS$150.00 · In stock · Download in 9 seconds
GB/T 13343-2008: Blast hole tricone rock bits Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 13343: Historical versions
Similar standardsGB/T 13343-2008: Blast hole tricone rock bits---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/GBT13343-2008GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 73.100.10 D 92 Replacing GB/T 13343-1992 Blast hole tricone rock bits Issued on. JULY 09, 2008 Implemented on. FEBRUARY 01, 2009 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Product classification... 6 5 Technical requirements... 7 6 Test methods... 9 7 Inspection rules... 10 8 Marking, packaging, transportation and storage... 11ForewordThis Standard replaces GB/T 13343-1992 “Blast hole tricone rock bits”. Compared with GB/T 13343-1992, the main changes of this Standard are as follows. - In the technical requirements, ADD the requirements for welding electrode, weld tensile strength and weld quality after the bit is assembled; - Further STANDARDIZE the content of test methods and inspection rules; - ADD the packaging requirements for bits; - CANCEL the color requirements for protective paint. This Standard was proposed by China Machinery Industry Federation. This Standard shall be under the jurisdiction of National Technical Committee on Mining Machinery of Standardization Administration of China (SAC/TC 88). Drafting organization of this Standard. Luoyang Mining Machinery Engineering Design and Research Institute Co., Ltd. Main drafters of this Standard. Zhou Shengyong, Guo Ming, Yang Xianli, Wang Yadong, Huang Jialin. The previous released version replaced by this Standard is as follows. - GB/T 13343-1992. Blast hole tricone rock bits1 ScopeThis Standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of blast hole tricone rock bits. This Standard is applicable to air-cooled and gas pressure deslagging tricone bits (hereinafter referred to as bits). The bit is mainly used for piercing blast hole in metallurgy, coal, chemical engineering, building materials, mining, etc.2 Normative referencesThe following documents contain the provisions which, through reference in this Standard, become the provisions of this Standard. For dated references, their subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard. However, the parties who enter into agreement based on this Standard are encouraged to investigate whether the latest versions of these documents are applicable. For undated reference documents, the latest versions apply to this Standard. GB 150-1998 Steel pressure vessels GB/T 2527 Hard metal (carbide) inserts for mining and oil-field rock bits GB/T 9253.1-1999 Threads on rotary shouldered connections for petroleum industry3 Terms and definitionsFor the purpose of this Standard, the following terms and definitions apply. 3.1 air-cooled and gas pressure deslagging bit A bit cools the bearings and removes the slag from the blast hole with compressed air 3.2 integrated bit A bit that is directly welded together by three jaws assembled with cones.4 Product classification4.1 According to assembly forms, bits can be divided into. 4.2 According to structural characteristics, bits are divided into steel tooth bits and inserted bits (see Table 1). 4.3 According to scope of use, bits are divided into 8 series (see Table 1). 4.5 Model and basic parameters 4.5.1 Model description5 Technical requirements5.1 Bits shall comply with the requirements of this Standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. Bit diameter D Diameter deviation Thread specification A B 5.2 The nozzle of bits is recommended to be assembled type. 5.3 When the bit is drilled into the water burst blast hole, the bit shall be provided with means to prevent mud from entering the bearing. 5.4 Cones and claws are made of alloy steel. 5.5 Die forgings are recommended for cones and jaw blanks. 5.6 The threaded joint body of separated bits is made of high-quality carbon steel or steel castings. Steel castings shall be free of cracks. After the surface is cleaned, it shall be smooth and flat. There shall be no defects such as shrinkage, burnt-on sand and slag, which affect the strength and appearance of the product. 5.7 Carbide teeth used in cone bits shall comply with the requirements of GB/T 2527. 5.14 The height tolerance of each cone to the end face of the shoulder of threaded joint of bits shall comply with the requirements of Table 5.6 Test methods6.1 The diameter of bits is measured with a measuring ring. 6.2 Inspection of the assembly quality of bits. 6.3 The running time of the test bench load test shall be not less than 4 h.7 Inspection rules7.1 Inspection classification The inspection is divided into factory-exit inspection and type inspection. 7.2 Factory inspection 7.3 Type inspection In any of the following cases, no less than 3 bits shall be taken on the test bench or at the site for type inspection. 7.4 Type inspection shall include all requirements of this Standard.8 Marking, packaging, transportation and storage8.1 The non-working end face of the threaded joint of each bit shall be printed with the following markings. 8.2 The connecting thread and nozzle seat hole shall be applied with anti-rust grease and shall be protected. 8.3 In addition to connecting threads, the other surfaces of bits shall be painted with protective paint. 8.4 The specifications of packaging box of bits shall meet the requirements for container transportation. 8.5 The appearance of packaging box shall have no less than the following markings. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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