TB_T_3250_2010(1)-E

TB_T_3250_2010(1)-E ICS 45.060.01 S 30 TS Railway Industrial Standard of the People’s Republic of China TB/T 3250—2010 Specifications of Sealing Design and Test for Powered Car Train-set (EMU) Issued on January 12, 2011 Enforced on July 01, 2011 Issued by Ministry of Railways of PRC TB/T 3250—2010 Table of Contents Foreword ................................................................................................................................1 1 Scope ...............................................................................................................................2 2 Normative References ......................................................................................................2 3 Terms and Definitions .....................................................................................................2 4 Sealing Design .................................................................................................................2 5 Sealing Test .....................................................................................................................4 0 TB/T 3250—2010 Foreword This Standard was drafted according to the rules specified in GB/T 1.1—2009. This Standard was proposed and is under centralized management of CNR Sifang Rolling Stock Research Institute Co, Ltd. This Standard was drafted by Locomotive & Rolling Stock Institute of China Academy of Railway Sciences, CNR Sifang Rolling Stock Research Institute Co, Ltd., Changchun Railway Vehicles Co., Ltd., CSR Qingdao Sifang Locomotive & Rolling Stock Co., Ltd, Tangshan Railway Vehicle Co., Ltd., and Low-temperature test station of Product Quality Surveillance Test Center of the Ministry of Railway. The main drafters of this Standard are Wang Yueming, Chen Houchang, Ouyang Zhongzhi, Chen Ping, Li Zeyu, Zhang Fangtao, Li Minggao, Wang Wei. 1 TB/T 3250—2010 Specifications of Sealing Design and Test for EMU 1 Scope This Standard defines the sealing design requirements and test method of EMU. This Standard is applicable to the sealing design and test of the EMU with maximum running speed of 200 km/h-350 km/h. It can also be used as a reference for the other railway vehicles with the same speed grade. 2 Normative References The following documents are essential for the application of this document. For the dated reference, only the dated version shall be applicable for this document. For the undated reference, the latest version (including all amendments) shall be applicable for this document. GB/T 4549.1—2004 Railway Vehicle Vocabulary—Part 1: Basic Vocabulary TB/T 1802—1996 Rain Leakage Test Method for Railway Vehicles 3 Terms and Definitions The terms and definitions defined in GB/T 4549.1—2004 and the following are applicable to this document. 3.1 Air-tightness Capacity of impeding air leakage. [GB/T 4549.1—2004, definition 6.14] 3.2 Water-tightness Capacity of impeding water leakage. 4 Sealing Design 4.1 Sealing requirements of whole EMU 4.1.1 Except for the machine room and equipment cabin outside the car, the EMU shall be designed with air tight to ensure safety and conformity of passengers and attendants. 4.1.2 The entire EMU can form an independent pressurized airtight cabin (hereinafter referred as airtight cabin) or form three independent airtight cabins, i.e. passenger cab, head car and driver's cab in tail car. 4.1.3 The air-tightness of EMU is guaranteed jointly by air-tightness of car structure, window, door, diaphram, air duct of air-conditioning and ventilation system and various through-the-wall cables, electrical, air and water pipelines, etc. Favorable air-tightness shall be maintained under ?6 kPa pressure. 4.1.4 During the design, leakage area shall be minimized to ensure air-tightness after the whole EMU train set is completed. The leakage area shall be weighted and allocated as per the equivalent length of combined position gap of the components forming the airtight structure; the equivalent length shall be determined with the following method: Diaphram L=a×I×k.........................................................(1) 1111 Car window L=a×I×k..........................................................(2) 2222 2 TB/T 3250—2010 Car door L=a×I×k................................................................(3) 3333 Pipeline L=a×I×k..................................................................(4) 4444 Air duct and leaked valve and cover, etc. L=a×I×k..........................(5) 55 55 Car body structure L=a×(L+L+L+L+L)............................(6) 6612345 Where, a(i=l,2,3,4,5,6)——weighting coefficient, which shall be determined as per the i sealing performance of the whole EMU; L(i=1,2,3,4,5,6)——equivalent length of the combination between diaphram, i window, door and through-the-wall pipeline and the car body respectively; I(i=1,2,3,4,5,6)——actual length of the combination between diaphram, window, i door and through-the-wall pipeline and the car body respectively; K(i=1,2,3,4,5,6)——respective number of diaphram, window, door and through-i the-wall pipeline; limiting value of equivalent leakage area of the part j of component i is: S?S×Li/(L+L+L+L+L+L) /ki ..............................(7) j123456 Where, S——sum of equivalent leakage area of the airtight cabin, unit: square centimeter 2(cm). 4.1.5 The leakage time limit of a certain airtight cabin shall be calculated with the following formula, which can be as a reference upon airtight test of components. Where, t—— leakage time of a certain airtight cabin, unit: second (s); P——air pressure at the beginning of timing, taken as 4kPa for the whole EMU; o P——air pressure at the end of timing, taken as 1kPa for the whole EMU; e V——sealing volume upon test. For the whole EMU, it is the actual volume in the 3train. Unit: cubic meter (m). 4.2 Sealing requirements of components 4.2.1 Metal structure of car body Metal structure of car body shall be designed as per the air-tightness requirements, and shall form a complete airtight cabin with the door, window and pipeline openings. Favorable air-tightness shall be maintained under the pressure of ?6 kPa . 4.2.2 Car window 4.2.2.1 Car window refers to the window of airtight cabin in the train-set. Car window shall be of complete sealing type. When the car window is installed on the car body structure, pressure sealing shall be conducted for it with sealing rubber strip and/or sealant. 4.2.2.2 Upon overall load bearing of car body structure, the sealing performance of the windows and the joints with the car body shall not be influenced. 4.2.2.3 The assembled windows shall maintain good sealing performance under the 3 TB/T 3250—2010 pressure load of ?6 kPa. 4.2.3 Car door 4.2.3.1 The side door requiring air-tightness on the car shall be sealing structural door. 4.2.3.2 Upon overall load bearing of car body structure, the sealing performance of the movable doors and the joints with the car body shall not be influenced. 4.2.3.3 The assembled doors shall maintain good sealing performance under the pressure load of ?6 kPa. 4.2.4 Diaphram 4.2.4.1 Airtight diaphrams shall be applied between cars. 4.2.4.2 The diaphram shall meet the air-tightness requirements during the operation on lines. 4.2.4.3 The assembled diaphram shall maintain good sealing performance under the pressure load of ?6 kPa. 4.2.5 Through-the-wall cables and pipelines 4.2.5.1 Various cables, electrical pipelines and other air and water pipelines from car interior to exterior shall be of sealing structure and be plugged and sealed with sealing material or sealant. 4.2.5.2 Water sealing and check valve measures shall be taken to avoid air and water pipelines that directly face to the car exterior. The measures shall ensure there is still sealing effect when the difference between the interior and exterior is ?6 kPa. 4.2.6 The air-tightness requirements of air conditioning unit, fresh air unit and waste exhaust case of air-conditioning and ventilation system in the EMU are the same to those for the whole EMU. 5 Sealing Test 5.1 Sealing test of whole EMU 5.1.1 Water-tightness test upon completion of whole EMU 5.1.1.1 A water injection test shall be conducted upon completion of the whole EMU. 5.1.1.2 During the test, the tested car and its status, test device, test method and evaluation shall be in accordance with TB/T 1802—1996.After the test, check whether there is water leakage at all structures, doors & windows and diaphram. 5.1.2 Air-tightness test upon completion of whole EMU 5.1.2.1 The air-tightness test upon completion of whole EMU can be conducted by air charging or vacuumizing. When the former method is adopted, the car interior shall be charged and pressurized with compressed air; when the pressure difference achieves 4kPa, air charging shall be stopped after the pressure is stabilized for 30s. 5.1.2.2 When the doors and windows, outward fresh air opening and waste exhaust opening of air-conditioning equipment are closed, the dropping time of pressure difference between the interior and exterior from 4kPa to 1kPa shall be not lower than the provisions in Fig. 1. Fig. 1 Depressurization Time of Air-tightness Test of Whole EMU Speed Level υ Depressurization Time km/h s 200?υ?250 40 4 TB/T 3250—2010 250?υ?350 50 5.1.2.3 The test device shall consist of air source equipment, air supply pipeline system, manometer, thermometer and timer, etc. The layout shall be as follows: a) One thermometer shall be set on the car exterior, with absolute error of less than 0.5?; b) A pressure test point shall be set at the place 1m above the floor in the car; the absolute error of pressure test system shall be lower than 10Pa, which can be tested from the car exterior. 5.1.2.4 During the air-tightness test, the car interior and exterior shall be kept dry and clean, the installation holes of the car doors, windows and all other equipment shall be plugged without air leakage. The temperature on the test site shall be more than 0?. 5.1.2.5 The effective test data for testing the required time of dropping from the predefined pressure value to the specified one shall be not less than 3 groups, and the tested average depressurization time f shall be calculated based on the mean arithmetical value of the effective data. 5.2 Sealing test of components 5.2.1 Leakage inspection for metal structure of car body After assembly welding of the metal structure of car body, all welds shall be examined and the pores, cracks or missing welding spots, if found, shall be repaired or plugged with sealant. 5.2.2 Air-tightness test of car window, door, diaphram and air conditioner The assembled car windows, doors, diaphram and air conditioners can be installed on trailer-made test device for air-tightness test. After it is pressurized to 6kPa or higher, the car windows, doors, diaphram and air conditioners shall have good tightness and the dropping time of test pressure difference from 4kPa to 1kPa shall be not less than the provisions in Fig. 1. See 5.1.2 for the test methods. 5 TB/T 3250—2010 Railway Industrial Standard of the People’s Republic of China Specifications of Sealing Design and Test for EMU TB/T 3250—2010 * Published and Issued by China Railway Publishing House (100054, No. 8 West Youanmen Avenue, Xuanwu District, Beijing ) Tel of Customer Service Department: local phone: (010) 51873174, railway phone: (021) 73174 Printed by Printing House of China Railway Publishing House All rights reserved. * Format 880mm×1230mm 1/16 Printed sheet 0.5 Word number 6,000 First edited in June 2011 First printed in June 2011 * 6