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JB/T 11880.2-2014 (JBT 11880.2-2014)

Chinese standards (related to): 'JB/T 11880.2-2014'
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JB/T 11880.1-2014English245 Add to Cart 0--3 minutes. Auto immediate delivery. Diesel engines. Selective catalytic reduction (SCR) systems. Part1: General requirements JB/T 11880.1-2014 Valid JBT 11880.1-2014
JB/T 11880.2-2014English265 Add to Cart 0--3 minutes. Auto immediate delivery. Diesel engines. Selective catalytic reduction (SCR) systems. Part2: Urea solution tanks JB/T 11880.2-2014 Valid JBT 11880.2-2014


   
BASIC DATA
Standard ID JB/T 11880.2-2014 (JB/T11880.2-2014)
Description (Translated English) Diesel engines. Selective catalytic reduction (SCR) systems. Part2: Urea solution tanks
Sector / Industry Mechanical & Machinery Industry Standard (Recommended)
Classification of Chinese Standard J93
Classification of International Standard 27.020
Word Count Estimation 24,232
Date of Issue 2014/7/9
Date of Implementation 2014/11/1
Quoted Standard GB/T 250; GB/T 1842-2008; GB/T 2828.1-2012; GB/T 16422.2; GB 18296; QC/T 417.1; QC/T 417.2; QC/T 417.3; QC/T 417.4; QC/T 417.5; QC/T 572; ISO 22241-3; ISO 22241-4-2009; SAE J2044
Drafting Organization Zhejiang Iron Horse Technology Co., Ltd.
Administrative Organization National Standardization Technical Committee combustion engine
Regulation (derived from) Ministry of Industry and Information Technology Notice No. 47 of 2014
Issuing agency(ies) Ministry of Industry and Information Technology of the People's Republic of China
Summary This Standard specifies the selective catalytic reduction (SCR) system, the terms and definitions urea solution tank, product type, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage requirements. This s


JB/T 11880.2-2014: PDF in English (JBT 11880.2-2014)
JB/T 11880.2-2014
JB
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 27.020
J 93
Filing number: 47526-2014
Diesel engines - Selective catalytic reduction (SCR)
systems - Part 2: Urea solution tanks
ISSUED ON: JULY 09, 2014
IMPLEMENTED ON: NOVEMBER 01, 2014
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 4 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 Product model ... 7 
5 Technical requirements ... 7 
5.1 General technical requirements ... 7 
5.2 Performance requirements ... 8 
6 Test method ... 10 
6.1 Specimen ... 10 
6.2 Visual inspection ... 10 
6.3 Inspection of dimensions and tolerances ... 10 
6.4 Tightness test ... 10 
6.5 Vibration durability test ... 10 
6.6 Pressure resistance test ... 11 
6.7 Low-temperature shock resistance test of plastic urea solution tank ... 11 
6.8 Heat resistance test of plastic urea solution tank ... 11 
6.9 Weather resistance test of plastic urea solution tank... 11 
6.10 Environmental stress cracking resistance test of plastic urea solution tank 12 
6.11 Chemical resistance test of plastic urea solution tank ... 12 
6.12 Internal cleanliness test ... 12 
6.13 Ventilation test ... 12 
7 Inspection rules ... 12 
7.1 Classification of inspections ... 12 
7.2 Exit-factory inspection ... 13 
7.3 Sampling inspection ... 13 
7.4 Type inspection ... 13 
8 Marking, packaging, transportation and storage ... 14 
8.1 Marking ... 14 
8.2 Packaging ... 14 
8.3 Transportation and storage ... 15 
Appendix A (Informative) Recommended materials for urea solution tank ... 16 
Appendix B (Normative) Design requirements of filling port ... 17 
Appendix C (Normative) Requirements for urea solution tank level and
temperature sensor ... 25 
Diesel engines - Selective catalytic reduction (SCR)
systems - Part 2: Urea solution tanks
1 Scope
This part of JB/T 11880 specifies the terms and definitions, product model,
technical requirements, test methods, inspection rules, marking, packaging,
transportation and storage of the urea solution tanks in the selective catalytic
reduction (SCR) system.
This part applies to SCR systems for diesel engines and vehicles. SCR systems
for other purposes can also be implemented by reference.
2 Normative references
The 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 250 Textiles - Tests for color fastness - Grey scale for assessing
change in color
GB/T 1842-2008 Plastics - Test method for environmental stress-cracking of
polyethylene
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1:
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB/T 16422.2 Plastics - Methods of exposure to laboratory light sources -
Part 2: Xenon-arc sources
GB 18296 Safety property requirements and test methods for automobile
fuel tank
QC/T 417 (all parts) Road vehicles - connections for on-board electrical
wiring harnesses
QC/T 572 Directives for motor vehicle cleanliness - Measuring method
4 Product model
The product model is compiled as follows:
Example:
NSG-35-475 refers to the urea solution tank with a rated volume of 35 L and a
475-type urea solution tank level and temperature sensor.
5 Technical requirements
5.1 General technical requirements
5.1.1 Working temperature
The operating temperature range of the urea solution tank is -40 °C ~ 85 °C.
5.1.2 Materials
Selection of materials for the urea solution tank and its accessories shall meet
the relevant requirements of the storage quality requirements of urea solution.
Please refer to Table A.1 and Table A.2 for material selection. All materials that
cannot be determined whether they are compatible with the urea solution need
to be tested, to evaluate the material's possible impact on the quality of the urea
solution product.
5.1.3 Structure
5.1.3.1 If the urea solution tank is formed by processing the plastic materials,
the tank can be divided into natural color black color. If there are special
requirements, it shall be negotiated and determined by the supplier and the
buyer.
5.1.3.2 The design of the filling port of the urea solution shall meet the
requirements of Appendix B.
5.1.3.3 In order to meet the requirements of the urea solution tank level and
temperature sensor to test the urea consumption, the parameters of the urea
level sensor shall have a corresponding relationship with the actual volume.
Code of urea solution tank level and temperature sensor
Rated volume
Code of urea solution tank
Carry out the test according to 6.6, the requirements are as follows:
a) Leakage and cracking are not allowed, but permanent deformation is
possible.
b) At room temperature, the dimensional change rate of resistance to
negative pressure is not more than 1%; at 50 °C, the dimensional change
rate of resistance to negative pressure is not more than 3%.
5.2.4 Low-temperature shock resistance of plastic urea solution tanks
After the test specified in 6.7, the urea solution tank is not allowed to leak.
5.2.5 Heat resistance of plastic urea solution tank
Carry out the test according to 6.8, and the requirements are as follows:
a) When filling liquid, the urea solution tank is not allowed to leak;
b) When there is no liquid, there is no abnormal phenomenon such as
deformation or discoloration by visual inspection.
5.2.6 Weather resistance of plastic urea solution tank
After the test specified in 6.9, the comparison grade of the gray scale for
discoloration of the plastic urea solution tank is grade 4 ~ grade 5.
5.2.7 Environmental stress cracking resistance of plastic urea solution
tanks
The environmental stress cracking time of the urea solution tank material is not
less than 200 h.
5.2.8 Chemical resistance
The urea solution tank has no abnormal phenomena such as dissolution,
swelling, discoloration, or cracks.
5.2.9 Internal cleanliness
The total amount of impurities in the urea solution tank assembly is less than
100 mg.
5.2.10 Ventilation
Minimum ventilation of the air vent is not less than 2 L/min.
6.6 Pressure resistance test
The urea solution tank is fixed on the test device in the simulated loading form.
Keep the ambient temperature of 50 °C ± 2 °C. Fill the urea solution tank with
water of rated volume at a temperature of 50 °C ± 2°C. Close the lid. Seal all
inlets and outlets. Apply a pressure of 30 kPa to the tank. Hold the pressure for
5 hours.
Seal all other inlets and outlets of the urea solution tank. Place the urea solution
tank in a metal frame of standard size under the specified test conditions for the
following two tests:
a) Apply a negative pressure of 3.0 kPa to the urea solution tank at room
temperature; measure the dimensional changes on each surface of the
urea solution tank after maintaining the pressure for 20 minutes;
b) After holding the temperature at 50 °C for 5 hours, add a negative pressure
of 3.0 kPa to the urea solution tank at this temperature; measure the
dimensional changes on each surface of the urea solution tank after
maintaining the pressure for 20 minutes.
6.7 Low-temperature shock resistance test of plastic urea
solution tank
It is performed according to the requirements of GB 18296.
6.8 Heat resistance test of plastic urea solution tank
According to the provisions of GB 18296, the urea solution tank is fixed on the
test device in the form of simulated loading. Add 2/3 of the rated volume of water
to the tank at room temperature. Place it at an ambient temperature of 85 °C ±
2 °C (such as placing it in 85 °C ± 2 °C water vapor medium) for 1 h.
If not filled with liquid, place it at 85 °C ± 2 °C ambient temperature for 200 h.
Observe the appearance change after taking it out.
6.9 Weather resistance test of plastic urea solution tank.
Cut a specimen which has a size of 60 mm x 60 from the product. Put it into the
xenon lamp weathering test box, with the outer surface facing the lamp tube.
The blackboard temperature is 63 °C ± 3 °C and the relative humidity is 50% ±
5 %. According to the test specifications as specified in GB/T 16422.2, make it
7.2 Exit-factory inspection
Before the product leaves the factory, it needs to be inspected by the company's
quality inspection department in accordance with the provisions of this part.
After passing the inspection, the product can be delivered only after the product
inspection certificate is issued. The inspection items, requirements and test
methods of the exit-factory inspection shall be implemented in accordance with
Table 2.
7.3 Sampling inspection
The sampling plan and the acceptanc......