QC/T 1065-2017 (QCT 1065-2017)

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QC/T 1065-2017	English	339	Add to Cart	4 days	Road tanker for flammable liquid goods transportation -- Manhole cover	QC/T 1065-2017	Valid	QC/T 1065-2017

QC/T 1065-2017
Road tanker for flammable liquid goods transportation-Manhole cover
Manhole cover for tank vehicle for road transport of flammable liquid dangerous goods
1 Scope
This standard specifies the terms and definitions, requirements, test methods, and inspections of manhole covers installed on tank vehicles for road transport of flammable liquids.
Rules and identification.
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
Manhole cover.
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 6944 classification and article number of dangerous goods
3 terms and definitions
The following terms and definitions apply to this standard.
3.1
Manhole
An opening in the tank that allows operators to enter and exit.
3.2
Manhole cover
The cover of the manhole is closed, and after opening, personnel can enter and exit the tank through the manhole.
3.3
Manhole cover neck ring
The structure on the tank is used for the fixed connection of the manhole cover.
3.4
Manhole cover gasket
Sealing element between manhole cover and manhole seat.
3.5
Emergency pressure limiting device
When the pressure inside the tank is abnormal, a device for quickly releasing the pressure in the tank.
3.6
Emergency relief pressure
Bleed pressure set by the emergency relief device.
3.7
Feed port
The manhole cover has an opening for the medium injection tank.
3.8
Secondary opening safety device
A device for releasing the vapor pressure in the tank in advance before the filling port is fully opened.
4 Technical requirements
4.1 Basic requirements
4.1.1 Manhole covers shall comply with the requirements of this standard and shall be manufactured in accordance with product drawings and technical documents.
4.1.2 The raw materials, purchased parts, outsourced parts and other parts applied to the manhole cover shall meet the requirements of relevant standards and shall be approved by the manufacturer
It can be used only after the home is qualified.
4.2 Structural and functional requirements
4.2.1 The manhole cover shall be provided with a material injection port and an emergency relief device.
4.2.2 The injection port should be fully open and equipped with a secondary opening device.
4.2.3 The manhole cover shall be provided with a spare interface for installing valves such as oil and gas recovery valves, anti-overflow sensors, and breathing valves.
4.2.4 The emergency relief device shall be designed to prevent the accumulation of liquid and the formation of ice.
4.2.5 When closed, keep the manhole cover in a sealed state to prevent liquid or gas from flowing out of the tank.
4.2.6 When the pressure in the tank is lower than the relief pressure, return to the closed state.
4.3 Materials
4.3.1 The selection of materials must fully consider its compatibility with the medium in contact.
4.3.2 Manhole covers should be made of aluminum alloy, stainless steel or carbon steel. Non-metallic materials are not allowed.
4.4 Dimensions
4.4.1 Nominal diameter should not be less than 500
4.4.2 The dimensions of the connection surface between the manhole cover and the manhole seat should meet the requirements of Appendix A.
4.4.3 The diameter of the emergency relief device should not be less than 250mm.
4.4.4 The height of any component installed on the manhole cover should not be higher than the sealing surface of the manhole cover installation 150
4.5 Design temperature range
The design temperature of the manhole cover is generally -20 ~ 50 ° C. When there are special environmental requirements, the design temperature should be 40 ~ 70 ° C.
4.6 Pressure setting
4.6.1 The nominal pressu