GB6951-1986
Safe surface voltage of light fuel oil in tank filling operation
轻质油品装油安全油面电位值
GB 6951-1986 is a current mandatory Chinese national standard for Safe surface voltage of light fuel oil in tank filling operation. It appears in the Environment compliance cluster with a product safety focus and has an implementation date of Sep 1, 1987.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard specifies the safe surface voltage for light fuel oils such as gasoline, kerosene, and diesel when filling metal containers like oil tanks, railway tank cars, and tank trucks. It is mandatory for operations involving these specific petroleum products. The standard does not apply to metal containers with suspended insulated conductors in the upper space, solid insulating objects inside, or when the oil surface contains hydrogen gas.
Technical requirements
The standard establishes the critical safety threshold to prevent ignition or explosion of flammable vapors during the transfer of light petroleum products. It defines the maximum allowable electrostatic potential that can accumulate on the oil surface due to friction during pumping operations. The core requirement mandates that the maximum surface voltage must not exceed the specified safety limit. It categorizes the potential into three types: surface voltage, maximum surface voltage, and safe surface voltage. The safe value is defined as the threshold where, even if a discharge to ground occurs, it will not ignite the explosive mixture of oil vapor and air within the explosive concentration range. The standard explicitly sets the safe surface voltage value at 12000V. Compliance with this limit is essential for fire and explosion prevention in fuel handling facilities.
Testing methods
The standard outlines a specific measurement method using an insulated copper ball as a collecting electrode placed on the oil surface. The procedure requires verifying the system's ground insulation resistance and capacitance before measurement. It involves specialized equipment including an ultra-high resistance meter, a small capacitance measuring instrument, and an electrostatic potentiometer to accurately capture the maximum voltage during the filling process.
FAQs
What products are regulated under GB 6951-1986?
It regulates light fuel oils including gasoline, kerosene, and diesel when loaded into metal containers such as oil tanks and tank trucks.
What is the safe surface voltage limit specified in GB 6951-1986?
The standard specifies a safe surface voltage limit of 12000V to prevent ignition of flammable vapors.
Are there any exclusions to the applicability of GB 6951-1986?
Yes, it does not apply to containers with suspended insulated conductors, solid insulating objects inside, or if the oil surface contains hydrogen gas.
The summary above provides a high-level overview of GB 6951-1986. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 6951-1986 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Safety
- CCS
- C66
- ICS
- 75.160.20
- Competent department
- National Energy Administration
- Technical committee
- National Energy Administration