标准搜索结果: 'QC/T 1064-2017英文版'
| 标准号码 | 内文 | 价格(元) | 第2步 | 交付天数[PDF] | 标准名称 | 相关标准 |
| QC/T 1064-2017 |
英文版
| 2009 |
购买全文
|
有发票，[PDF]天数 <=4
|
道路运输易燃液体危险货物罐式车辆 呼吸阀
|
QCT 1064-2017
|
标准编号: QC/T 1064-2017 (QC/T1064-2017)
中文名称: 道路运输易燃液体危险货物罐式车辆 呼吸阀
英文名称: Road tanker for flammable liquid goods transportation -- Pressure and vacuum breather vent
行业: 汽车行业标准 (推荐)
字数估计: 17,184
发布日期: 2017-01-09
实施日期: 2017-07-01
标准依据: 工业和信息化部公告2017年第2号
范围: 本标准规定了道路运输易燃液体危险货物罐式车辆上安装的呼吸阀的术语和定义、要求、试验方法、检验规则和标志。
QC/T 1064-2017
Road tanker for flammable liquid goods transportation -- Pressure and vacuum breather vent
道路运输易燃液体危险货物罐式车辆呼吸阀
1 范围
本标准规定了道路运输易燃液体危险货物罐式车辆上安装的呼吸阀的术语和定义、要求、试验
方法、检验规则和标志。
本标准适用于运输 GB 6944 规定的、在 50 °C时蒸汽压力不大于110 kPa(绝对压力）的第三类易
燃液体，但不包括其中的液态退敏爆炸品或具有毒害性、腐蚀性介质的道路运输罐式车辆上安装的
呼吸阀。
2 规范性引用文件
下列文件对于本标准的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本
标准。凡是不注日期的引用文件，其最新版本(包括所有的修改单)适用于本标准。
GB/T 1239.2 冷卷圆柱螺旋弹簧技术条件第 2 部分:压缩弹簧
GB/T 23935 圆柱螺旋弹簧设计计算
GB 6944 危险货物分类和品名编号
GB/T 7307 55°非密封管螺纹
3 术语和定义
下列术语和定义适用于本标准。
3.1
呼吸阀 pressure and vacuum breather
安装在罐体或人孔盖上，能随罐内压力变化而自动启闭，使罐体内外压差保持在允许范围内的
阀门。
3.2
标称开启压力 marked set pressure
标注在呼吸阀上的开始呼气、吸气状态时的压力。
3.3
实测开启压力 actual set pressure
检验得到的呼吸阀开始呼气、吸气状态时的压力。
3.4
流道面积 flow area
阀进口端至关闭件密封面间流道的最小横截面积，用于计算无任何阻力影响时的理论流童。
3.5
通气直径 flow diameter
对应于流道面积的直径。
4 技术要求
4.1 基本要求
4.1.1 呼吸阀应符合本标准要求，并按产品图样和技术文件制造。
4.1.2 呼吸阀上所应用的原材料、外购件、外协件等零部件应符合相关标准的规定，并经阀门生产
制造厂家验收合格后方可使用。
4.2 功能要求
4.2.1 呼吸阀应能平衡罐体内外压差，使其保持在允许范围内，但不能代替其他在装卸料过程中提
供相似功能的阀件。
4.2.2 呼吸阀应装有不小于 80目的不锈钢丝阻火网或其他能够起到相同阻火功能的部件。
4.2.3 压力设置。
4.2.3.1 呼气开启压力，应设定在 6 kPa〜I2 kPa。
4.2.3.2 吸气开启压力，应设定在 - 4 kPa〜 - 2 kPa。
4.2.4 实测开启压力。
实际检验得到的开启压力应符合呼吸阀标称开启压力要求。
4.2.5 阀座密封性。
在 0.8倍实测开启压力下，按照附录 A 选取保压时间，在保压时间内阀门泄漏率应符合附录 B
中等级 A 的要求。
4.2.6 倾覆密封性。
将呼吸阀在正常使用安装方向，绕水平轴旋转 90°、180°和 270并在髙于呼吸阀呼气开启压力
22 kPa 的压力下,按附录 A 中规定的时间保压,其泄漏率应符合附录 B 中等级 F 的要求。
4.2.7 坠落渗漏量。
呼吸阀在坠落试验后 1 分钟内，向主体容器内加压，使位于呼吸阀中心线处表压达到 0.8倍的
呼吸阀实测正压开启压力。按照附录 A 选取保压时间，泄漏率应符合附录 B 中等级 B的要求。
4.2.8 设计温度范围。
呼吸阀的设计温度应为
20 〜50;当有特殊环境要求时设计温度宜为 - 40~70。
4.2.9 材料。
4.2.9.1 呼吸阀的制造材料选用必须充分考虑其与所接触介质的相容性。
4.2.9.2 呼吸阀的壳体宜采用铝合金或不锈钢制造，不应采用铁和非金属材料制造。
4.2.10 弹簧。
4.2.10.1 呼吸阀弹簧应按照 GB/T 23935 的设计计算。
4.2.10.2 呼吸阀弹簧应满足 GB/T 1239.2 中精度等级 2级弹簧的技术条件。
4.2.10.3 呼吸阀弹簧两端应各有大于或等于 1/2圈的支撑平面，支撑圈末端应与工作圈并紧。
4.2.11 连接。
采用法兰连接时，则法兰需满足附录 C 中 C.2的法兰连接尺寸；采用螺纹连接，螺纹需满足
GB/T 7307中 G1K或 G2 的要求。
4.2.12 导静电电阻。
呼吸阀组件上任何一个导电零部件与呼吸阀本体之间的导静电电阻不得高于10。
4.2.13 通气直径。
通气直径应大于或等于 19 mm。
5 试验方法及要求
5.1 试验数量
型式试验样品数量按每种通径抽取2件。
5.2 呼吸阀开启压力试验
5.2.1 试验介质可选择空气或其他适用气体。试验介质温度应在 5 °C〜40 °C。
5.2.2 将呼吸阀安装在测试工装上，使阀门安装状态与其正常工作时状态一致；确保阀门处于关
5.2.3 记录此时压力值。
5.3 阀座密封性试验
5.3.1 试验介质可选择空气或其他适用气体。试验介质温度应在 5〜40 °C。
5.3.2 将呼吸阀安装在测试工装上，使阀门安装状态与其正常工作时状态一致；确保阀门处于关
闭、密封状态，缓慢、平稳地增加呼吸阀阀瓣、阀座两侧压差直至达到实测开启压力。
5.3.3 完成上述试验后，将压差平稳、缓慢的降低到 0.8 倍实测开启压力值，并按照附录 A 选取保
压时间。
5.4 倾覆密封性试验
5.4.1 试验介质可选择空气或其他适用气体。试验介质温度应在 5〜40 °C。
呼吸阀呼气进气口端，呼吸阀呼气出气口端压力应为大气压力。
5.4.3 将呼吸阀在相对正常使用安装方向，绕水平轴旋转 90°、180°和 270°进行测试。在测试压力
下，按照附录 A 选取保压时间。
5.5 坠落试验
5.5.1 试验介质可选择水和空气或其他适用介质。试验介质温度应在 5〜40。
5.5.2 试验设备。
坠落试验设备主体为一容器，在容器侧面有一用于安装测试阀门的法兰。试验设备应满足以下
要求:
a) 坠落试验设备的尺寸、公差、特征结构可参照附录 D所示；
c) 支脚下冲击地带(沙箱盒)可参照附录 D 所示；
d) 提升和释放装置应能保证坠落试验设备能够被提升到指定试验高度，并从该髙度自由
坠落
e) 提升和导向装置不能影响测试设备的自由掉落；
f) 坠落试验设备设计和操作应符合当地安全法规要求，并具有防止意外坠落的功能；
g) 坠落试验设备的主体罐体应能够承受试验所需压力及所受冲击力。
5.5.3 试验步骤。
试验过程按下述顺序进行：
a) 将呼吸阀组件安装在测试设备安装法兰上，呼吸阀中心线应与安装法兰中心线同心；
c) 提升试验设备至释放点，使设备提升 1.2 m 髙；
d) 将沙盒中沙子搅拌松软均匀，然后垫上橡胶垫；
e) 释放测试设备，使设备自由坠落 1.2 m;
f) 在坠落后 1 分钟内，向主体容器内加压，并按附录 A 选取保压时间。擦拭被测呼吸阀及安
装法兰，观察泄漏率。
5.6 导静电试验
5.6.1 试验前应干燥呼吸阀及其零部件。
5.6.2 采用 500 V直流兆欧表测量电阻。
5.6.3 测量呼吸阀组件上任何一个可能与介质接触的导电零部件与壳体之间的导静电电阻。
6.1 出厂检验
6.1.1 每台产品均应按规定项目进行出厂检验，经生产企业检验合格并签发产品合格证后方可
出厂。
6.1.2 出厂检验项目：
a) 外观；
b) 呼吸阀开启压力试验；
c) 阀座密封性试验；
d) 倾覆性密封试验。
6.2 型式检验
a) 新产品试制定型时；
b) 正式生产时，连续生产3 年或产董累计 10 000 台时；
c) 正式生产后，如结构、材料、工艺有较大改变，可能影响产品性能时；
d) 出厂检验与型式检验有重大差异时。
6.2.2 型式检验时，如属 6.2.1 中 a)、b)两种情况，应按第 4 章的内容进行检验;如属 6.2.1 中 c)、
d)两种情况，可仅对受影响项目进行检验。
7 标识
7.1 呼吸阀标识应铸刻在阀体本体上，或采用标识牌形式永久固定在阀体上，并清晰可见。
7.2 标志至少应包括以下内容：
b) 制造厂定型号；
c) 生产序列号或生产日期；
d) 开启压力；
e) 公称直径；
f) 其他需要特别说明的工作条件。
QC/T 1064-2017
Road tanker for flammable liquid goods transportation-Pressure and vacuum breather vent
Road transport flammable liquid dangerous goods tank vehicle breathing valve
1 Scope
This standard specifies the terms and definitions, requirements, and tests of breathing valves installed on tank vehicles for road transport of flammable liquid dangerous goods.
Methods, inspection rules and signs.
This standard is applicable to the third category of transport stipulated in GB 6944, where the steam pressure at 50 ° C is not greater than 110 kPa (absolute pressure)
Flammable liquids, but not including liquid desensitized explosives or road transport tank vehicles with toxic and corrosive media
Breathing valve.
2 Normative references
The following documents are essential for the application of this standard. For dated references, only the dated version applies to this
standard. For undated references, the latest version (including all amendments) is applicable to this standard.
GB/T 1239.2 Technical specifications for cold rolled cylindrical coil springs Part 2. Compression springs
GB/T 23935 Design and calculation of cylindrical coil spring
GB 6944 classification and article number of dangerous goods
GB/T 7307 55 ° unsealed pipe thread
3 terms and definitions
The following terms and definitions apply to this standard.
3.1
Pressure valve and vacuum breather
Installed on the tank or manhole cover, it can be opened and closed automatically as the pressure inside the tank changes, so that
valve.
3.2
Marked set pressure
Indicate the pressure at the beginning of exhalation and inhalation on the breathing valve.
3.3
Actual set pressure
Examine the pressure when the breathing valve starts to exhale and inhale.
3.4
Flow area
The minimum cross-sectional area of the flow channel between the valve inlet end and the sealing surface of the closing member is used to calculate the theoretical flow child without any resistance effect.
3.5
Flow diameter
Corresponds to the diameter of the runner area.
4 Technical requirements
4.1 Basic requirements
4.1.1 Breathing valves shall comply with the requirements of this standard and shall be manufactured according to product drawings and technical documents.
4.1.2 The raw materials, purchased parts, outsourced parts and other components applied on the breathing valve shall comply with the relevant standards and be produced by the valve
Can only be used after the manufacturer has passed the acceptance test.
4.2 Functional requirements
4.2.1 The breathing valve should be able to balance the pressure difference between the inside and outside of the tank to keep it within the allowable range.
Valves for similar functions.
4.2.2 The breathing valve shall be equipped with a stainless steel wire flame-retarding net of not less than 80 mesh or other parts capable of performing the same flame-proof function.
4.2.3 Pressure setting.
4.2.3.1 The exhalation opening pressure should be set between 6 kPa and I2 kPa.
4.2.3.2 Suction opening pressure should be set at -4 kPa ~-2 kPa.
4.2.4 Measure the opening pressure.
The opening pressure obtained from the actual inspection shall meet the nominal opening pressure requirements of the breathing valve.
4.2.5 Seat tightness.
Under 0.8 times the measured opening pressure, select the holding time in accordance with Appendix A. The valve leakage rate during the holding time should comply with Appendix B.
Level A requirements.
4.2.6 Overturning tightness.
Place the breathing valve in the normal use installation direction, rotate 90 °, 180 ° and 270 about the horizontal axis and hold the breathing valve at the opening pressure
Under a pressure of 22 kPa, the pressure shall be maintained for the time specified in Appendix A, and its leakage rate shall meet the requirements of Grade F in Appendix B.
4.2.7 Fall leakage.
The breathing valve is pressurized into the main container within 1 minute after the drop test, so that the gauge pressure at the centerline of the breathing valve reaches 0.8
The breathing valve measures the positive opening pressure. Select the dwell time in accordance with Appendix A, and the leakage rate shall meet the requirements of Grade B in Appendix B.
4.2.8 Design temperature range.
The design temperature of the breathing valve should be
20 ~ 50; When there are special environmental requirements, the design temperature should be -40 ~ 70.
4.2.9 Materials.
4.2.9.1 The materials used for the manufacture of breathing valves must be fully considered for their compatibility with the media they are in contact with.
4.2.9.2 The housing of the breathing valve should be made of aluminum alloy or stainless steel, and should not be made of iron and non-metal materials.
4.2.10 Spring.
4.2.10.1 Breathing valve spring shall be calculated according to the design of GB/T 23935.
4.2.10.2 Breathing valve springs shall meet the technical requirements of GB/T 1239.2 precision level 2 springs.
4.2.10.3 Each end of the breathing valve spring shall have a supporting plane greater than or equal to 1/2 turn, and the end of the supporting ring shall be tight with the working ring.
4.2.11 Connection.
When using a flange connection, the flange must meet the flange connection size of C.2 in Appendix C; using a thread connection, the thread must meet
Requirements of G1K or G2 in GB/T 7307.
The conductive resistance between any conductive part on the breathing valve assembly and the breathing valve body must not be higher than 10.
4.2.13 Ventilation diameter.
The ventilation diameter should be greater than or equal to 19 mm.
5 Test methods and requirements
5.1 Number of tests
The number of type test samples shall be 2 pieces for each diameter.
5.2 Opening pressure test of breathing valve
5.2.1 The test medium can be air or other applicable gas. The temperature of the test medium should be between 5 ° C and 40 ° C.
5.2.2 Install the breather valve on the test fixture so that the valve installation state is consistent with its normal working state; make sure the valve is closed
5.2.3 Record the pressure at this time.
5.3 Seat tightness test
5.3.1 The test medium can be air or other applicable gases. The test medium temperature should be 5 ~ 40 ° C.
5.3.2 Install the breather valve on the test fixture so that the valve installation state is consistent with its normal working state; make sure the valve is closed
Closed and sealed, slowly and steadily increase the pressure difference between the valve flap and the valve seat until the measured opening pressure is reached.
5.3.3 After completing the above test, reduce the pressure difference to 0.8 times the measured opening pressure value steadily and slowly, and select the protection according to Appendix A.
Press time.
5.4 Overturning tightness test
5.4.1 The test medium can be air or other applicable gas. The test medium temperature should be 5 ~ 40 ° C.
The pressure at the breather inlet end of the breathing valve and the pressure at the breather outlet end of the breathing valve should be atmospheric pressure.
5.4.3 Test the breathing valve by rotating it 90 °, 180 °, and 270 ° around the horizontal axis in the relative normal installation direction. Testing pressure
Next, select the dwell time according to Appendix A.
5.5 Drop test
5.5.1 The test medium can be water and air or other suitable media. The temperature of the test medium should be between 5 and 40.
5.5.2 Test equipment.
The main body of the drop test equipment is a container, and a flange for mounting a test valve is provided on the side of the container. The test equipment shall meet the following
Claim.
a) For the dimensions, tolerances and characteristic structures of the drop test equipment, please refer to Appendix D;
c) The impact zone (sandbox) under the feet can refer to Appendix D;
d) The lifting and releasing device should be able to ensure that the drop test equipment can be lifted to the specified test height and free from that degree
come down
e) the lifting and guiding devices must not affect the free fall of the test equipment;
f) The design and operation of the drop test equipment shall comply with the requirements of local safety regulations and have the function of preventing accidental falls;
g) The main tank of the drop test equipment shall be able to withstand the pressure and impact force required for the test.
5.5.3 Test procedure.
The test process is performed in the following order.
a) Install the breather valve assembly on the test equipment mounting flange. The breather centerline should be concentric with the flange centerline
c) Lift the test equipment to the release point and lift the equipment by 1.2 m 髙;
d) stir the sand in the sandbox to make it soft and even, then put on a rubber pad;
e) release the test equipment to make the equipment free fall 1.2 m;
f) Within 1 minute after falling, pressurize the main container, and select the holding time according to Appendix A. Wipe the tested breathing valve and
Install the flange and observe the leakage rate.
5.6 Static Conduction Test
5.6.1 The breathing valve and its parts should be dried before the test.
5.6.2 Use 500 V DC megohmmeter to measure resistance.
5.6.3 Measure the electrostatic resistance between any conductive part on the breathing valve assembly that may be in contact with the medium and the housing.
6.1 Factory inspection
6.1.1 Each product shall be inspected from the factory according to the specified items, and only after passing the inspection by the manufacturer and issuing a product certificate
Leave the factory.
6.1.2 Factory inspection items.
a) appearance;
b) Opening pressure test of breathing valve;
c) Seat tightness test;
d) Overturning seal test.
6.2 Type inspection
a) When new products are trial-typed;
b) When it is officially in production, if it is continuously produced for 3 years or when the production and management directors have accumulated 10,000 units;
c) After the formal production, if the structure, material and process are changed greatly, which may affect the performance of the product;
d) When there is a significant difference between the factory inspection and the type inspection.
6.2.2 In the case of type inspection, if it is a) or b) in 6.2.1, it shall be inspected in accordance with Chapter 4; if it is in c) of 6.2.1,
d) In both cases, only the affected items can be inspected.
7 Identification
7.1 The identification of the breathing valve shall be cast on the body of the valve body, or be permanently fixed on the valve body in the form of identification plates, and shall be clearly visible.
7.2 The logo should include at least the following.
b) manufacturer's model;
c) serial number or date of production;
d) opening pressure;
e) nominal diameter;
f) Other working conditions that require special instructions.
|