JB/T 11880.3-2014 PDF EnglishUS$150.00 · In stock · Download in 9 seconds
JB/T 11880.3-2014: Diesel engines - Selective catalytic reduction (SCR) systems - Part 3: Urea solution line Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsJB/T 11880.3-2014: Diesel engines - Selective catalytic reduction (SCR) systems - Part 3: Urea solution line---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/JBT11880.3-2014 JB MECHANICAL INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.020 J 93 Filing number: 47527-2014 Diesel engines - Selective catalytic reduction (SCR) systems - Part 3: Urea solution line ISSUED ON: JULY 09, 2014 IMPLEMENTED ON: NOVEMBER 01, 2014 Issued by: Ministry of Industry and Information Technology of PRC Table of ContentsForeword ... 4 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 6 4 Product model ... 6 5 Performance requirements ... 7 6 Test method ... 9 6.1 Specimen preparation ... 9 6.2 Appearance inspection ... 9 6.3 Inspection of dimensional tolerance ... 9 6.4 Burst pressure test ... 9 6.5 Negative pressure deformation test ... 9 6.6 Tensile strength test ... 10 6.7 Pressure resistance test ... 10 6.8 Tightness test ... 10 6.9 Urea corrosion resistance test ... 10 6.10 Flame retardancy test... 11 6.11 Flow restriction test ... 11 6.12 Aging resistance test ... 12 6.14 Stress crack test ... 12 6.15 Heating performance test ... 13 6.16 Electrical performance test (only for electric heating tube) ... 14 7 Inspection rules ... 14 7.1 Inspection classification ... 14 7.2 Exit-factory inspection ... 14 7.3 Sampling inspection ... 14 7.4 Type inspection ... 14 8 Signs and labels ... 15 8.1 Signs ... 15 8.2 Labels ... 16 9 Packaging, transportation, storage ... 16 Diesel engines - Selective catalytic reduction (SCR) systems - Part 3: Urea solution line1 ScopeThis part of JB/T 11880 specifies the terms and definitions, product models, performance requirements, test methods, inspection rules, signs and labels, packaging, transportation, storage of urea solution line and assembly in the selective catalytic reduction (SCR) system. This section applies to SCR systems for diesel engines and vehicles. SCR systems for other purposes can also be implemented by 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) are applicable to this standard. GB/T 2408-2008 Plastics - Determination of burning characteristics - Horizontal and vertical test GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection GB/T 2918 Plastics - Standard atmospheres for conditioning and testing GB/T 5563 Rubber and plastics hoses and hose assemblies - Hydrostatic testing GB/T 9572 Rubber and plastics hoses and hose assemblies - Determination of electrical resistance and conductivity GB/T 9574 Rubber and plastics hoses and hose assemblies - Ratios of proof and burst pressure to design working pressure GB/T 9575 Rubber and plastics hoses - Hose sizes, minimum and maximum inside diameters, and tolerances on cut-to-length hoses6 Test method6.1 Specimen preparation The specimen status of the plastic parts shall be conditioned according to the provisions of GB/T 2918. 6.2 Appearance inspection Observe it with naked eyes. Take a specimen with a length of 100 mm on the inner surface of the pipe and use a cutting tool to cut it along the axial direction. Check whether there is defect. 6.3 Inspection of dimensional tolerance Product’s dimensional tolerance requirements shall be implemented in accordance with GB/T 9575. 6.4 Burst pressure test 6.4.1 Room temperature burst pressure test It is performed according to the provisions of GB/T 5563. 6.4.2 High temperature burst pressure test After keeping at 100 °C for 0.5 h and 1 h, it shall be implemented in accordance with GB/T 5563. 6.5 Negative pressure deformation test 6.5.1 Specimen There are five pipeline assemblies with a length of 300 mm between the pipe fittings. 6.5.2 Test process At room temperature, apply a pressure of -0.05 MPa to the pipeline; keep it for 10 minutes; check for deformation. After the test is completed, a ball with a diameter of 80% of the inner diameter 6.10 Flame retardancy test Take five tubes with a length of about 125 mm as specimens. Carry out the test according to the steps specified in test method A in GB/T 2408-2008. 6.11 Flow restriction test 6.11.1 Specimen For a urea tube of a given diameter, cut three specimens as required. The length of the tube is calculated according to formula (1). Where: L - The length of the tube, in millimeters (mm); Rmin - The minimum bend radius, in millimeters (mm). 6.11.2 Test process Place the specimen on the test fixture as shown in Figure 1. When the tube is installed, it shall bend in the same horizontal plane and be in a free bending state. Keep the position of the tube and the test fixture unchanged at a room temperature of 23 °C ± 2 °C. Then put the steel ball into one end of the urea line, to check whether the steel ball can freely pass through the other end of the urea tube. The diameter of the steel ball shall be calculated according to formula (2). Where: D - The diameter of the steel ball, in millimeters (mm); ID - The minimum inner diameter of the inner tube, in millimeters (mm). 6.15 Heating performance test 6.15.1 Specimen Take three pipeline assembly samples with a length of 1000 mm. Use 8 times the outer diameter of the tube as the bend radius to make it in U-shape. 6.15.2 Test equipment A system device that can control heating and a thermostat that can control temperature. 6.15.3 Thawing test The test process is as follows: a) Put the pipeline assembly sample with the embedded temperature measuring device in the thermostat; connect it with the heating system; lead in 32.5% urea solution; set the required test temperature; start the thermostat; b) When the measured temperature of the temperature measurement device reaches the set test temperature, start the heating controller, until the temperature of each temperature measurement point reaches 5 °C. Record the required time. 6.15.4 Heating cycle test The test process is as follows: a) Put the sample of the pipeline assembly embedded with the temperature measuring device into the thermostat; connect it with the heating system; lead in 32.5% urea solution; set the required test temperature; start the thermostat; b) When the measured temperature of the temperature measurement device reaches the set temperature, start the heating controller; take 48 h as a cycle (the heating time is 24 h and the time without heating is 24 h); perform 20 cycles continuously; c) After the test is completed, check the appearance of the pipeline; carry out the room temperature burst pressure test according to the requirements specified in 6.4.1. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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