4.1 Design Unit Selection: The selection of a design unit for the liquefied petroleum gas storage tank system engineering shall be handled by the project organization department of the provincial (city, district) companies. They should choose from the design institutes shortlisted in the sector, and the responsible leader must sign and approve it. The design unit should be qualified in petrochemical engineering design and industrial pipeline (GC2) design. 4.2 Site Survey: 4.2.1 The site survey should be organized by the project organization department of the provincial (city, district) companies, involving the construction, pipeline installation, quality safety, and design institute departments of the branch office where the gas station is located. 4.2.2 For the survey of the gas station, understand the existing internal underground pipeline routes, cable laying, and burial depths. For stations that cannot provide on-site pipeline data, use pipeline detection technology to determine the existing process, electrical, and water supply and drainage pipelines. 4.2.3 The construction department of the branch office where the gas station is located shall propose suggestions for the scope and method of renovation, including the oil unloading vapor recovery system, fueling vapor recovery system (dispersed, centralized), and vapor emission treatment equipment, based on the principles of economy and suitability and relevant local government requirements. After obtaining approval from the responsible leader and the project organization department of the provincial (city, district) company, the design unit will base the design on these suggestions. 4.3 Design Proposal: 4.3.1 The design proposal submitted by the design institute should include general layout, oil vapor recovery process diagrams, and a list of main equipment and materials. 4.3.2 The design proposal should be reported to the project organization department of the provincial (city, district) company, which will organize the pipeline installation, quality safety departments, construction personnel from the branch office where the gas station is located, and the design institute for proposal review, and then it will be reported to the responsible leader for approval. 4.4 Construction Drawing Design: 4.4.1 The selection of equipment shall be provided by the project organization department of the provincial (city, district) companies, with a list of pre-qualified suppliers for vapor recovery equipment. The design institute will select the relevant equipment based on this list. The equipment selection should follow the principles of safety and reliability, advanced technology, economic practicality, and compliance with emission standards, and use products that are easy to install, convenient, and have minimal on-site modifications. Pay attention to the following: 4.4.1.2 Preferably select equipment from the same manufacturer in the same area for easy after-sales service. 4.4.1.2 Gas stations with an annual gasoline filling volume of over 3,000 tons and more than 10 gasoline guns should use centralized fueling vapor recovery systems; others should use dispersed systems. 4.4.1.3 Choose different types of vapor recovery technology and equipment based on the internal space of the fuel dispenser. For example, a secondary recovery dispersed vacuum pump should use a lower power model that can be driven by the existing power supply of the fuel dispenser, and it should not require additional power cables. 4.4.1.4 The vapor emission treatment equipment should be selected based on the surrounding environment of the gas station, the size of the site, and the business volume. The maximum vapor processing capacity of the vapor emission treatment equipment should be 10% to 20% of the maximum fuel filling volume. 4.4.2 Construction Drawing Design: 4.4.2.1 The design institute will carry out construction drawing design based on the approved design proposal. 4.4.2.2 The liquefied petroleum gas storage tank pipeline should use seamless steel pipes that comply with the current national standard GB/T8163 for fluid transmission. The design pressure of the oil pipeline should not be less than 0.6 MPa, and the design pressure of the vapor recovery pipeline should not be less than 0.13 MPa. Flexible materials such as thermoplastic plastic pipelines should not be used.
Liquefied Petroleum Gas (LPG) Storage TankWe offer compressed gas or liquefied gas storage tanks.Liquefied Petroleum Gas TankFixed-volume storage tanks and variable-volume storage tanks, categorized by the change in container capacity, with large fixed-volumeLiquefied Petroleum Gas (LPG) Storage TankSpherical in shape for the small ones, cylindrical for the larger ones. The movable volume storage tank, also known as a low-pressure gas storage tank, commonly referred to as a gas holder, has a geometric volume that can be adjusted. It is tightly sealed, preventing gas leakage, and serves to balance air pressure and regulate gas supply, with pressure typically not exceeding 60 MPa.
Liquefied gas storage tanks undergo strict quality assessments for the material of pressure components, dimensional appearance, weld quality, operational quality, installation quality, internal equipment, and safety accessories.
Routine physical and chemical tests for the material of the drum, such as mechanical properties and chemical composition.
The welding joints, welds, tank heads, and the mutual geometric positions of all pressure elements are rigorously inspected through X-ray non-destructive testing and magnetic particle inspection. Tests are conducted on the product's sealing, pressure resistance, and all technical indicators that could affect the safe operation of the product.
