EPC bidding for the addition of hydrogen storage spheres to the Ordos photovoltaic hydrogen production project

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Bid invitation for EPC work to add hydrogen storage tanks to the photovoltaic hydrogen production project in Ordos (Bid number: T261100130070). Location of the project: Shagedu Town, Zhungeer Banner, Ordos City, Inner Mongolia Autonomous Region. I. Bid requirements: The EPC general contracting project for adding hydrogen storage tanks to the Narisong photovoltaic hydrogen production renovation project in Zhungeer Banner, Ordos City, has been approved. The funding for this project comes from internal sources. The bidder is Ordos Hanxia New Energy Co., Ltd. (hereinafter referred to as Hanxia Company), while the bidding agency is Three Gorges International Tendering Co., Ltd. This project meets the requirements for bidding, and the bidding method now is open bidding. II. Project Overview and Scope of Bidding 2.1 Project Overview 2.1 Project Overview The Jungar Narisong Photovoltaic Hydrogen Production Industry Demonstration Project is located in Jungar Banner, Ordos City, and consists of a photovoltaic power plant area and a hydrogen production facility. Photovoltaic power is transmitted to the hydrogen production plant via dedicated transmission lines, and after voltage reduction and rectification, it powers 15 alkaline water electrolyzers. The hydrogen produced by electrolysis undergoes gas-liquid separation and purification to yield high-purity hydrogen (purification outlet pressure of 1.5 MPaG), which is then transported externally in two ways: one portion is pressurized to 5.6 MPaG using a reciprocating hydrogen compressor and sent via pipelines to downstream chemical plants ； The other portion is pressurized to 20 MPaG using a hydrogen liquid drive compressor and then filled into a long-tube trailer for transportation. The project is designed to have an annual production capacity of around 10,000 tons of green hydrogen, and it includes a hydrogen refueling station. The renovation project was registered on September 16, 2025, and is located within the photovoltaic hydrogen production industry demonstration project site in Zhungeer Banner, Ordos City. It is planned to build a new hydrogen storage sphere tank along with its associated facilities. The diameter of this tank is approximately 10.80 meters, its water capacity is 650 cubic meters, the operating pressure is 4.5 MPa, and the design pressure is 4.95 MPa. The designed service life is 20 years, and the total hydrogen storage capacity at an operating pressure of 4.5 MPa shall be no less than 28,000 m³ (calculated according to the method in 3.0.4 of GB 50177-2005). 2.2 Scope of the Tender: This project is divided into 1 bid section. The scope of procurement includes the EPC general contracting work for the additional hydrogen storage tanks in the Ordos City Zhungeer Narisong photovoltaic hydrogen production renovation project. This involves detailed surveys (including geological surveys) for the new hydrogen storage tanks and their associated equipment, pipelines, etc.; design work (including optimization of process flow diagrams and preparation of equipment layout drawings); procurement of materials, equipment, and piping components (including the main body of the hydrogen storage tanks, safety valves, pressure gauges, level gauges, emergency shut-off valves, as well as pipeline valves, anti-corrosion and insulation materials, components for fire suppression systems, and hardware for control systems); construction and installation (including tank assembly and welding, non-destructive testing, pressure testing, leak detection, pouring of civil engineering foundations, installation of pipe rack supports, laying and welding of process pipelines, anti-corrosion and insulation work, integration of the intelligent control system with the DCS/SIS/GDS systems in the control room, as well as installation and debugging of the fire suppression system and PLC control system); commissioning and acceptance (including individual unit tests, joint tests, 72-hour full-load performance evaluations, as well as compliance with inspections required by government authorities for special equipment, fire safety approvals, and safety facility inspections); related technical services (including pre-job training for operators, technical guidance for maintenance staff, technical briefings throughout the project lifecycle, HAZOP analysis and SIL grading for the entire hydrogen production facility); as well as management of safe and civilized construction, quality control, and schedule management during the project implementation phase. It also includes coordination with the existing systems in the photovoltaic hydrogen production facility, as well as the preparation and submission of completion documents (including operation manuals, maintenance manuals, as-built drawings, test reports, and other technical documents). The main contents of the tender are as follows: 2.2.1 Installation of new hydrogen storage tanks and their associated equipment (including engineering survey and design work). The water volume of the hydrogen storage tanks shall be 650 m³, while the total hydrogen storage capacity at a working pressure of 4.5 MPa shall be no less than 28,000 m³ (calculated according to the method specified in 3.0.4 of GB 50177-2005). The working pressure shall be no less than 4.5 MPa, and the design pressure shall be no less than 4.95 MPa. Including but not limited to: 2.2.1.1 Foundation and substructure: foundation treatment for spherical tanks, foundations for spherical tanks, foundations for pipe galleries and supports, as well as modifications to the foundations of fire pump units. 2.2.1.2 Equipment body: It includes key components such as spherical shells, end caps, supports, manholes, piping connections, and safety valves; the material specifications and welding requirements must be specified. 2.2.1.3 Auxiliary systems: Include supporting devices such as pressure monitoring, temperature detection, emergency venting, and safety interlocks, which must be compatible with the on-site automation control system. The hardware interfaces of all auxiliary systems must comply with the GB/T 19582 or IEC 61131-2 standards, and the communication protocols must be compatible with the existing automation control systems on site (such as Modbus RTU/TCP, Profibus DP, etc.). The bidder must provide complete interface definitions, communication configuration manuals, and integration debugging plans to carry out joint testing with the main system. 2.2.2 Renovation of supporting fire protection facilities (including engineering design work): To meet fire protection requirements, fire pump stations are equipped with fire pumps that satisfy fire safety standards (including diesel fire pumps) as well as pressure maintenance pumps for fire protection purposes. Strictly follow the design drawings and construction specifications to complete the linkage testing of fire protection facilities as well as the fire safety inspection, ensuring that the modified fire protection system meets the requirements of ** and local fire safety regulations. 2.2.3 All equipment required for the construction and renovation of this project, including the procurement and installation of all new monitoring instruments, leak detection devices, control valves, etc., for the spherical tanks, up to their connection to the DCS/SIS/GDS control cabinets in the control room of the hydrogen production plant. 2.2.4 All construction work required for project development, including construction, testing and inspection, defect correction, and completion acceptance. Collaborate with the tenderer and supervision unit to carry out acceptance inspections for sub-projects, partial projects, as well as the final acceptance and registration procedures for the entire project. Responsible for compiling and submitting complete technical documentation related to completion (including construction records, test reports, acceptance certificates, etc.). Strictly adhere to safety and civilized construction standards on site, implement environmental protection measures such as dust control and noise reduction, to ensure that the construction process is safe and compliant. 2.2.5 Others: The design of hydrogen storage cylinders must facilitate rapid hydrogen replacement, so as to ensure that the output hydrogen remains of high purity even when the input hydrogen is of high purity (the composition limits for high-purity hydrogen are specified in GBT 3634.2-2011) ； The design and installation of hydrogen storage spheres must take scalability into account (such as providing pipeline connections for adding more spheres in the future) ； HAZOP analysis/SIL classification for the entire hydrogen production plant area ； Specify the purchase of specialized tools ； Special evaluations and acceptance processes, as well as visualization and construction compliance procedures. 2.3 Planned duration of work/service period/delivery deadline: The work is scheduled to take place from April 1, 2026, to September 30, 2026 (the exact start date shall be subject to the written notification from the employer’s supervision engineer), with a duration of 183 calendar days.