GB/T 13344-2019 PDF EnglishUS$210.00 · In stock · Download in 9 seconds
GB/T 13344-2019: Down-the-hole hammers and 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 13344: Historical versions
Similar standardsGB/T 13344-2019: Down-the-hole hammers and 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/GBT13344-2019GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 73.100.10 D 92 Replacing GB/T 13344-2010 Down-the-hole hammers and bits ISSUED ON: AUGUST 30, 2019 IMPLEMENTED ON: MARCH 01, 2020 Issued by: State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 6 4 Models and basic parameters ... 6 5 Technical requirements ... 9 6 Test methods ... 11 7 Inspection rules ... 12 8 Marks, packaging, transport and storage ... 14 Annex A (informative) Matching table of working parameters of hammer and down-the-hole drilling machine ... 16 Down-the-hole hammers and bits1 ScopeThis Standard specifies terms and definitions, models and basic parameters, technical requirements, test methods, inspection rules as well as marks, packaging, transport and storage for down-the-hole hammers and bits. This Standard is applicable to down-the-hole hammers and bits that are powered by compressed air or a mixed medium of compressed air and water.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 1184-1996, Geometrical tolerancing - Geometrical tolerance for features without individual tolerance indications GB/T 5621, Test methods of performance for rock drilling machines and pneumatic tools GB/T 6247 (all parts), Rock Drilling Machines and Portable Power Tools - Terminology GB/T 13306, Plate GB/T 22512.2-2008, Petroleum and natural gas industries - Rotary drilling equipment - Part 2: Threading and gauging of rotary shouldered thread connections JB/T 7161, General specification of heat-treatment for rock drilling machines and pneumatic tools JB/T 7165, Rock Drilling Machines and Pneumatic Tools - General Specifications for Assembly JB/T 7302, Rock drilling machines and pneumatic tools - General specifications for packing of products Where, E - Impact energy, in Joules (J); m - Piston mass, in kilograms (kg), obtained by weighing method; v - Piston impact speed, in meters per second (m/s). 6.5 When using the final velocity method to measure the impact energy of the hammer, through the recorded waveform, calculate the impact frequency of hammer. 6.6 When using the final velocity method to measure the impact energy of the hammer, through a flowmeter with the accuracy not less than level 1.5 that is in series connection to the pipeline, measure the air consumption of hammer. 6.7 Use a Vernier caliper with a resolution not less than 0.02mm or other measuring tools that can meet the same accuracy requirements to inspect the size parameters of hammers and bits. 6.8 The inspection of rear connector thread of hammer is in accordance with GB/T 22512.2-2008. 6.9 The starting air pressure, runaway performance, and flexibility of the hammer are tested on the test bench by simulating working conditions. 6.10 The service life test of hammers and bits is carried out through on-site industrial test. Randomly select 3 hammers or 10 bits during the test. Under normal working conditions, determine the average footage before scrapping.7 Inspection rules7.1 Inspection type The inspection for hammers and bits is divided into exit-factory inspection and type inspection. The exit-factory inspection is carried out by the manufacturing enterprise. The type inspection is entrusted to statutory product quality supervision and inspection agency to carry out. 7.2 Exit-factory inspection 7.2.1 The exit-factory inspection items of hammers and bits shall respectively comply with Table 8 and Table 9. 7.2.2 Only the products that pass the exit-factory inspection and are attached with quality certificate leave the factory. 7.4 Sampling and rules for judgement 7.4.1 Randomly inspect 5 pieces per batch for hammer’s exit-factory inspection. Randomly inspect 10 pieces per batch for bit’s exit-factory inspection. When hammers and bits are not in compliance with the standard after inspection, it shall double for re-inspection. If it still fails, this batch of products shall fail in the exit-factory inspection. 7.4.2 Randomly extract from the conforming products in the exit-factory inspection for hammer’s type inspection. Extract 2 pieces for each batch. If any item in No. 2, 3, 4, 8 in Table 8 inspection items fails or any two items in No. 1, 5, 6, 7, 9 in Table 8 inspection items fail, this product shall be determined as nonconforming. When 1 of 2 pieces fails, then it shall double for random inspection. If more than 1 (including 1) of 4 pieces fail, this batch of products shall be determined nonconforming in the type inspection. 7.4.3 Randomly inspect 5 pieces for bit’s type inspection. If No. 5 item in Table 9 inspection items fails or any two items in No. 1~4 in Table 9 inspection items fail, this product shall be determined as nonconforming. When 1 out of 5 pieces fails, it shall double for random inspection. If more than 1 (including 1) out of 10 pieces fail, this batch of products shall be determined as nonconforming in the type inspection.8 Marks, packaging, transport and storage8.1 Marks On the obvious part of the product, there shall be a mark that meets the requirements of GB/T 13306. The content includes: a) Name or trademark of manufacturing enterprise; b) Product model and product name; c) Acceptance air pressure; d) Product number; e) Manufacturing date (year, month). 8.2 Packaging 8.2.1 Product packaging shall be carried out in accordance with JB/T 7302. 8.2.2 The outer packaging shall be marked with product implementation standard, enterprise name, address and phone number. 8.2.3 The product packing shall be accompanied by the following documents: a) Packing list; b) Product certification; c) Product installation, use and maintenance instructions. 8.3 Transport and storage The product shall be waterproof, moisture-proof and corrosion-proof during transportation and storage. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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