Skip to product information
1 of 7

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

JB/T 11880.8-2014 English PDF (JBT11880.8-2014)

JB/T 11880.8-2014 English PDF (JBT11880.8-2014)

Regular price $150.00 USD
Regular price Sale price $150.00 USD
Sale Sold out
Shipping calculated at checkout.
Delivery: 3 seconds (Download full-editable-PDF + Invoice).
Quotation: Click JB/T 11880.8-2014>>Add to cart>>Quote
Editable-PDF Preview (Reload if blank, scroll for next page)

JB/T 11880.8-2014: Disesl engines - Selective catalytic reduction (SCR) systems - Part 8: Selective catalytic reduction converters
This part of JB/T 11880 specifies the terms and definitions, technical requirements, test methods, inspection rules, marking, packaging, transport, storage of selective catalytic reduction (SCR) converters (hereinafter referred to as SCR converters) in selective catalytic reduction (SCR) systems for diesel vehicles. This part applies to diesel engines and vehicles equipped with SCR converters. SCR converters for other purposes can also be implemented by reference.
JB/T 11880.8-2014
JB
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 27.020
J 93
Filing number: 47532-2014
Diesel engines - Selective catalytic reduction (SCR)
systems - Part 8: Selective catalytic reduction
converters
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 Technical requirements ... 6
4.1 General ... 6
4.2 General requirements... 6
4.3 Airtightness ... 7
4.4 Mechanical properties ... 7
4.5 Conversion efficiency ... 8
4.6 Durability ... 8
4.7 Insertion loss ... 9
4.8 Power loss ratio ... 9
4.9 Exhaust back pressure difference ... 9
4.10 Corrosion resistance ... 9
5 Test method ... 10
5.1 Tightness test ... 10
5.2 Mechanical performance test ... 10
5.3 Conversion efficiency test ... 10
5.4 Durability test... 11
5.5 Test of insertion loss, power loss ratio and exhaust back pressure difference ... 11
5.6 Corrosion resistance test ... 11
6 Inspection rules ... 11
6.1 Inspection classification ... 11
6.2 Inspection items ... 12
6.3 Sampling plan and evaluation rules ... 12
7 Marking, packaging, transportation, storage ... 12
7.1 Marking ... 12
7.2 Packaging ... 14
7.3 Transportation ... 15
7.4 Storage ... 15
Diesel engines - Selective catalytic reduction (SCR)
systems - Part 8: Selective catalytic reduction
converters
1 Scope
This part of JB/T 11880 specifies the terms and definitions, technical
requirements, test methods, inspection rules, marking, packaging, transport, storage of selective catalytic reduction (SCR) converters (hereinafter referred to as SCR converters) in selective catalytic reduction (SCR) systems for diesel vehicles.
This part applies to diesel engines and vehicles equipped with SCR converters. SCR converters 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 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 8170-2008 Rules of rounding off for numerical values and expression
and judgement of limiting values
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests GB/T 15089 Classification of power-driven vehicles and trailers
GB 17691-2005 Limits and measurement methods for exhaust pollutants
from compression ignition and gas fueled positive ignition engines of
vehicles (III IV V)
GB 18352.3-2005 Limits and measurement methods for emissions from
light-duty vehicles (III, IV)
GB/T 18377 Requirements and measurement methods of catalytic
a) Carrier structure, material and manufacturer;
b) The number, shape, size, volume, pore density of the carrier;
c) Catalyst type and manufacturer;
d) Pad model and manufacturer;
e) SCR converter’s package form.
4.2.4 This part requires all calculation results to be rounded off to two significant digits in accordance with the provisions of GB/T 8170-2008.
4.3 Airtightness
When the SCR converter is tested for tightness according to the provisions of 5.1, its pressure drop shall not exceed 5 kPa.
4.4 Mechanical properties
4.4.1 After the SCR converter is subjected to the axial thrust test according to the provision of 5.2.1 and the thermal life and water quenching test according to the provision of 5.2.2, the measured relative displacement of the carrier shall not be greater than 3 mm; the cumulative axial displacement of the carrier relative to the original position shall not be greater than 6 mm.
4.4.2 After the SCR converter is subjected to the thermal life and water quenching test according to the provision of 5.2.2, when the tightness test is performed according to 5.1, the pressure drop shall not exceed 5 kPa and the load shall not be broken.
4.4.3 After the SCR converter is subjected to the random thermal vibration test under the (40000 ± 400) h-1 space velocity condition as specified in Table 1, there shall be no cracks, desoldering, carrier chipping, etc. in any part of the SCR converter.
5 Test method
5.1 Tightness test
Apply (30 ± 5) kPa pressure air in the SCR converter. Determine the pressure drop within 30 s.
5.2 Mechanical performance test
5.2.1 Axial thrust test
Under normal temperature, uniformly apply an axial thrust of 1500 N on the end face of the carrier, to detect the axial displacement.
5.2.2 Thermal life and water quenching test
It is performed in accordance with the provisions of GB/T 18377.
5.2.3 Vibration test
Install the SCR converter on the vibration bench according to the state of use on the vehicle. The performance of the vibration test bench meets the
requirements listed in Table 1. The support for installing the SCR converter shall simulate the installation state of the SCR converter on the vehicle; meanwhile it shall have sufficient strength and rigidity. According to the installation state of the SCR converter, perform the vibration test according to the requirements specified in Table 1. After completing the vibration test, check whether the SCR converter has cracks, desoldering, carrier chipping or other damage. The SCR converter before and after vibration shall undergo a tightness test and be disassembled, to measure the axial displacement of the carrier before and after the test.
5.3 Conversion efficiency test
The new SCR converter shall be pre-treated before the conversion efficiency test. The pretreatment can be carried out according to the following conditions (1) or (2):
- Condition (1): At the inlet temperature of (500 ± 25) °C of the SCR converter and the space velocity of (40000 ± 400) h-1, make it running for 5 h;
- Condition (2): Light-duty vehicles shall be performed in accordance with the provisions of C.5.3 of GB 18352.3-2005, and heavy-duty vehicles shall be - There are no specific requirements for the font and size of the permanent marking, as long as it can be identified.
7.2 Packaging
7.2.1 Precautions for packaging
Considerations for product packaging:
a) Requirements for moisture-proof, vibration-proof and dust-proof;
b) Meet the relevant requirements of transportation and handling;
c) There are temporary protective measures (such as shields, sheaths, etc.) at the connector of the product, to prevent the inner cavity from being contaminated;
d) The matching parts on the ferrous metal parts of the product before
packaging shall have temporary anti-rust protection measures.
7.2.2 Packing carton
7.2.2.1 The packing carton shall be firm; the product shall not move in the carton, to avoid damage to the product during transportation.
7.2.2.2 The technical documents supplied with the product in the packing carton shall include: packing list, product exit-factory certificate, product specification. The content of the product exit-factory certificate shall include:
a) Product name and model;
b) Product exit-factory number (batch number);
c) The name and trademark of the manufacturer:
d) Inspection conclusion;
e) Inspector's signature;
f) Date of inspection.
7.2.2.3 The outside of the packing carton shall be marked of the following: a) Registered trademark or product quality certification mark, barcode; b) Product name and model;
c) The name, address, zip code and telephone number of the manufacturer;
View full details