Huzhou Boiler FactoryLimited Company

60-cubic-meter LNG storage tank

Product Category: LNG Storage Tanks

LNG stands for Liquefied Natural Gas. Its primary component is methane. LNG is colorless, odorless, non-toxic, and non-corrosive. Its volume is approximately 1/600th that of an equivalent volume of gaseous natural gas, and its weight is about 45% of the same volume of water. The calorific value is around 52 MMBtu per ton (1 MMBtu = 2.52×10^8 calories).

Model:

60 cubic meters0.8MPa

Detailed Description

Product Name: LNG Storage Tank

Manufacturer:Heze Boiler FactoryLimited Company

LNG Storage Tank

Hekou Group

An LNG storage tank is a jacketed vacuum powder-insulated pressure vessel specifically designed for storing and supplying low-temperature liquefied gases (such as liquid nitrogen, liquid oxygen, liquid argon, liquid carbon dioxide, etc.). It is widely used in both industrial production and daily life. This article briefly outlines the basic requirements and safety points for use, based on an analysis of the hazardous characteristics of low-temperature liquids and various gas supply modes for low-temperature liquid storage tanks.

1. Analysis of Low-Temperature Liquid Hazardous Characteristics

Low-temperature liquids possess hazardous characteristics such as lower boiling points, greater expansiveness, strong asphyxiating properties, and strong oxidizing properties.

1.1 Boiling points of low-temperature liquids at 101.3 KPa: Liquid nitrogen at -196°C, liquid oxygen at -183°C, and liquid argon at -186°C. Contact with the human body can cause severe frostbite to the skin and eyes. In case of minor leakage or internal leakage in valves and pipes, these liquids absorb heat from the surrounding environment, causing rapid condensation and frost formation at the leak point, which can lead to freezing in severe cases.

1.2 Low-temperature liquids absorb energy from the surrounding environment due to high heat or large leaks, causing their volume to expand rapidly upon vaporization. Under 0℃ and 101.3 KPa pressure, the volume of gases produced from 1L of low-temperature liquid vaporization: nitrogen is 674L, oxygen is 800L, and argon is 780L. In sealed containers or pipelines, the increase in internal pressure due to the vaporization of low-temperature liquids can easily lead to overpressure explosions.

1.3 In the surrounding environment of low-temperature liquid storage tanks, after the low-temperature liquid leaks and vaporizes, it's prone to form rich gas areas. If concentrations of nitrogen, argon, or carbon dioxide are high, asphyxiation injuries are极易 to occur. Additionally, oxygen concentration at a high level can also lead to hyperoxic injuries.

1.4 Oxygen is a powerful oxidizer with extremely strong oxidizing properties. Liquid oxygen, when in close proximity to combustible materials, is highly flammable upon contact with an open flame; contact with combustible materials can easily lead to explosions due to vibrations or impacts; mixing with combustible materials poses a potential explosive hazard. Liquid oxygen can adhere to clothing and fabrics, and upon contact with an ignition source, it can cause a flash fire, posing a risk to personal safety.

2. Low-temperature Liquid Storage Tank Air Supply Mode and Basic Requirements

According to different usage scenarios and user requirements, the gas supply modes for low-temperature liquid storage tanks are mainly...

Available services: high-pressure cylinder refilling, low-temperature insulated cylinder packaging, centralized gas supply through pipelines, and low-temperature liquid spray feeding.

LNG60 cubic meters, 0.8 MPa parameter value:

60 cubic meter LNG storage tank

Formed:

First, the natural gas produced from the gas field is purified and then undergoes supercritical (at -162℃) atmospheric pressure liquefaction to form liquefied natural gas.

The critical temperature of LNG between gas and liquid phases at atmospheric pressure is -162℃.

The standard commonly used in LNG manufacturing is API 620 of the American Petroleum Institute.

LNG Storage Vessel

Powered by low-temperature liquid storage tanks as the gas source, suitable for filling high-pressure gas cylinders.

Individual users of scattered gas generally require standardized implementation by professional production and filling units. According to current national administrative licensing requirements, filling units must hold a designated production (storage) permit for hazardous chemicals, an安全生产license, and a gas cylinder filling permit, collectively known as "one document and two permits," to carry out high-pressure gas cylinder filling. At the liquid outlet of low-temperature liquid storage tanks, low-temperature liquid pumps and high-pressure gasifiers are installed, and a high-pressure filling system is used to fill high-pressure gas into specialized gas cylinders. In the gas cylinder filling process, a pipeline low-temperature and overpressure automatic shutdown protection system must be set up. If there is still low-temperature liquid at the gasifier outlet or if the pipeline pressure exceeds the high working pressure of the gas cylinder, the low-temperature liquid pump should automatically shut down, and the low-temperature liquid storage tank should stop supplying gas to prevent the direct filling of low-temperature liquid into the gas cylinder or overpressure filling causing an explosion.

Atmospheric Storage Tank:

We offer medium to large-sized atmospheric LNG storage tanks, as well as extra-large atmospheric LNG storage tanks.

2. Cautionary Notes

1. Cylinders must be stored in well-ventilated areas, with a distance of at least 1.5 meters from any flame or heat source. Cylinders are strictly prohibited from being heated with fire, boiled, or left exposed to direct sunlight. Regular inspections of cylinder valves and pipeline joints for airtightness are required to ensure no leakage. Soap water can be used to check for leaks, but open flames are strictly forbidden for leak testing.

2. When lighting, ignite the primer first, followed by opening the gas; do not reverse the order. There should be someone watching over it during use; do not leave it unattended to prevent boiling water from overflowing and extinguishing the flame, which could cause the liquefied gas to escape and lead to an explosion. After using the gas cylinder, make sure to close the valve tightly to prevent gas leakage.

3. Do not completely exhaust the liquefied gas inside the cylinder; a certain residual pressure should be maintained. The residual pressure should generally be greater than 49.03 kPa (i.e., 0.5 kg/cm², gauge pressure) to prevent air from entering the cylinder. After the liquefied petroleum gas is used up, the remaining residue inside the cylinder is also a flammable material and should not be disposed of arbitrarily to avoid fires caused by the leakage and evaporation of the residue.

4. LPG cylinders are pressurized containers that require proper maintenance and regular inspections. Prevent the cylinders from falling or being struck during handling and use. Do not use metal tools to敲击 open the valve. Protect them from direct sunlight and prolonged exposure to rain. Cylinders should generally be inspected every 2 years.

5. Although the explosive range of liquefied petroleum gas (LPG) is not very wide, its lower limit is small, making it easy to ignite and explode upon leakage. Additionally, as LPG is heavier than air, it tends to flow downward in the air, accumulating in low-lying areas and posing a hidden danger of gas explosion. Therefore, in areas where gas leakage is prone, relying solely on window ventilation is insufficient; attention must also be given to proper ventilation at the lower level.

6. When a liquefied gas leak is detected indoors, windows and doors should be opened immediately for ventilation, allowing the gas to disperse away from any open flame. No fire is allowed in the vicinity. The area should only be used after the fault is resolved and the distinctive odor has dissipated. Any leaked liquid on the ground should be covered with sand and soil before being removed to a safe location. In the event of a gas cylinder fire, the valve should be closed immediately, the cylinder moved to an open area outdoors, and extinguished using dry powder extinguishers, carbon dioxide extinguishers, or by covering with a wet sack.

7. Educate children not to tamper with gas cylinders carelessly, and users must be aware of the safety knowledge for using gas cylinders.