Huzhou Boiler Factory Co., Ltd. oversees a development center, an installation company, and three production bases. It has established close cooperative relationships with numerous key universities and research institutions in China. New product development is ongoing and highly favored by a wide customer base. We offer industrial and residential coal-fired boilers, oil-fired boilers, gas-fired boilers, biomass boilers, heat transfer oil boilers, waste heat recovery boilers, refrigeration auxiliary equipment, and pressure vessels of categories I, II, and III (including liquefied gas tanks, liquid ammonia tanks, methyl chloride tanks, propane tanks, underground tanks, tower equipment), as well as low-temperature containers (liquid oxygen tanks, liquid nitrogen tanks, liquid argon tanks), heat exchanger units, ground source heat pump units, and more. Over the years, the company has actively implemented an innovation strategy themed around technological, market, and management innovation, accelerating the pace of corporate reform and restructuring. It has gradually established and improved a modern corporate system that adapts to the socialist market economy system.

Liquefied Petroleum Gas (LPG) primarily originates from refinery gas and associated gas from oil fields.

I. Extracted from petroleum gas at refineries

Refinery gas oil is a byproduct gas generated during the refining and processing of crude oil, its quantity depending on the production method and processing depth of the refinery, typically around 4%-10% of the original weight. Currently, the recovery of liquefied petroleum gas from catalytic cracking gas at refineries is the main source of domestic LPG.

Obtained from associated gas from oil fields

Associated gas from oil fields is a byproduct gas produced during the oil extraction process. It is itself a combustible gas that exists within the geological structures of the oil reservoirs, containing 10%-40% of propane, butane, pentane, and higher carbon alkanes. During oil extraction, both oil and associated gas are emitted simultaneously. They are separated using gas-oil separation units installed above the oil wells. The associated gas contains approximately 5% of propane and butane components, which can be extracted using absorption methods, resulting in high-purity liquefied petroleum gas with very low sulfur content. The liquefied petroleum gas supplied by countries such as Europe, the United States, and Japan often falls into this category.

III. Derived from Natural Gas

Pure natural gas extracted from underground is divided into dry gas and wet gas. Wet gas contains less than 90% methane, with more than 10% of ethane, propane, butane, and other alkane contents. After the gas is compressed and fractionated, it is absorbed by diesel spray, then condensed into a liquid state at a pressure of 1.6 MPa in a fractionating tower, forming liquefied petroleum gas.

Safety Procedure for Inverting Drums

1. Prior to production or maintenance procedures, first inspect the pressure, level, and temperature of the pouring and emptying tanks, record the details upon confirmation, and then proceed with tank emptying.

2. Determine the liquid output volume of the discharge tank and the incoming liquid volume of the receiving tank, and calculate if the receiving tank's capacity meets the process and safety requirements; confirm the tank transfer process.

3. The operation procedure is: open the liquid phase valves for in and out of the tank—adjust the vapor phase valves—start the circulating compressor.

4. During decanting, pay attention to checking the storage tank's pressure and liquid level changes, and constantly reverify calculations. The incoming liquid tank must not exceed the highest permitted liquid level.

5. After decanting is complete, shut off the compressor, close the liquid phase valve, and re-adjust the compressor valve.

6. Carefully fill out the operation records.

Our company specializes in tank-type pressure vessels, which are one of our key products. These include LPG storage tanks, anhydrous ammonia tanks, liquid chlorine tanks, propane tanks, C5 storage tanks, and low-temperature storage tanks for liquid oxygen and nitrogen. Particularly, our LPG storage tanks have been mass-produced with a continuous production line, offering a variety of models in stock. Volumes range from 5 to 200 cubic meters, and are available in both above-ground and underground types.

Procedures for Safe Operation of Liquefied Petroleum Gas Aboveground Storage Tanks

1. Use tanks in accordance with national standards and design parameters; strictly prohibit overpressure and overflow operations.

2. Inspections are strictly conducted according to regulations; tanks that fail to meet standards are not to be put into use.

3. Various safety accessories of storage tanks must be inspected regularly in accordance with regulations to ensure normal operation.

4. Valves connected to the storage tank, including normally open and normally closed valves, must be clearly marked.

5. The storage tank's liquid volume must be strictly controlled below 85%, and the liquid level gauge must have clear limit markings.

5. Promptly empty the tank when it's found to be overfilled.

6. Conduct daily routine checks of the tank's pressure, temperature, and level, handle any anomalies promptly, and report them immediately.

7. When the summer temperature exceeds 35℃ and the storage tank pressure is above 10 kgf, the sprinkler cooling system must be activated.

8. When the winter temperature drops below 5°C, daily inspection and treatment of waste water drainage from storage tanks should be conducted to prevent ice blockage.