Cryogenic air separation（ASU）, engineered to order
Worldwide installation · Technical response within 24 hours
Cryogenic air separation（ASU）, engineered to order
Worldwide installation · Technical response within 24 hours
RESOURCES
When air separation suppliers are being compared, the documents usually decide the shortlist. Tell us which stage you are at and we will send the pack that matches it.
Technical response time
Preliminary technical proposal
Provide Company Profile & Capability Brief
Quality documentation sample
DOCUMENT PACK
01
Preliminary technical proposal
Process description, utility consumption, equipment list and budget price.
02
Plant data sheet, blank
The parameters we need: gas, flow, purity, pressure, ambient conditions and footprint.
03
Typical flow scheme and general arrangement
Reference flow diagram and plot layout for the plant type you are considering.
04
Manufacturing and inspection plan
Workshop scope, weld and NDT coverage, pressure and leak test schedule.
05
Company and capability profile
Workshop, equipment, team, licences and reference plants.
06
Quality documentation sample
Material certificate, weld map, radiographic report and performance test report.
HOW TO REQUEST
Send the gas, flow, purity and site conditions you are working with. A finished specification is not required to start — the data sheet above is what we use, and technical answers are returned within 24 hours.
START WITH YOUR PROCESS
Tell us the document and the project stage, and we will send the matching pack within the working days stated above.
FREQUENTLY ASKED QUESTIONS
Short answers to the questions that come up most often in technical evaluation.
A cryogenic air separation unit is an industrial system that separates atmospheric air into oxygen, nitrogen and argon through low-temperature distillation. Air is compressed, purified and cooled until it liquefies, then separated in distillation columns where each gas is extracted at its own boiling temperature.
Steel and metallurgy, chemical and coal chemical complexes, petrochemical and refinery sites, oil & gas and LNG projects, semiconductor and electronics manufacturing, photovoltaic and battery production, medical oxygen supply and the energy sector.
Yes. We can supply equipment with erection supervision, execute the air separation scope as turnkey EPC with one point of responsibility, or install and operate the plant on site and sell gas under a long-term agreement. The scope covers process design, manufacture, inspection and testing, shipment, installation, commissioning and operator training.
Send us the gas type (O₂ / N₂ / Ar / LNG), the required flow in Nm³/h, purity, discharge pressure, whether liquid product and storage are needed, plus the site country and conditions. A finished specification is not required to start — technical answers and a budgetary figure are returned within 24 hours.
MANUFACTURING & QUALITY CONTROL
Cold boxes, molecular sieve purifiers and pressure vessels are built and tested in our workshop in Binhai County, Yancheng — 15,200 m² of production area including a 2,500 m² pressure vessel fabrication shop.
01
Workshop assembly
Cold boxes and purifier skids are assembled and function-tested before shipment, so instrumentation, valves and control logic are verified while the equipment is still accessible.
02
Radiographic testing
Critical welds on pressure vessels and piping are examined in our own X-ray room, and the inspection records form part of the documentation package.
03
Testing before dispatch
Dimensional and weld inspection, pressure and leak testing, electrical and instrument loop checks and control logic verification.
04
Documentation at handover
Material certificates, weld and inspection records, test reports, operating and maintenance manuals and as-built drawings.
QUALIFICATIONS & COMPLIANCE
Equipment for cryogenic gas plants is pressure equipment, and buyers audit the documentation as closely as the hardware.
Special equipment manufacturing licence
Held — People's Republic of China (pressure vessels)
Radiographic testing (NDT)
In-house X-ray room for vessel and pipe work
Design codes
GB 16912 (oxygen safety), GB 50030 (oxygen station design), IEC 61511 practice for the safety layer
International certification
ASME / PED certification route available on request
Technology cooperation
Institute of Process Engineering, Chinese Academy of Sciences; Tsinghua University; Tianjin University; Yancheng Institute of Technology; Qingdao University of Science and Technology
Quality documentation
Material certificates, weld and inspection records, performance test reports
Certificates are available to qualified customers during technical evaluation. Where a project requires certification to a specific international standard, we confirm the route in writing before contract.
TECHNICAL INSIGHTS
Written for the people who evaluate and run the plant — plant selection, energy consumption and operation.
How does an air separation plant work?
Process overview
Compression, purification, refrigeration and double-column distillation — the systems that make up a cryogenic plant.
Cryogenic vs PSA oxygen plants
Route selection
Where PSA stops being economic, and why purity, flow and liquid backup decide the route.
How often should molecular sieve be replaced?
Maintenance
Service life, regeneration, and the symptoms that show a purifier is no longer performing.
+8618066130855
haishuoenergy@haishuoairsep.com
8618066130855
8618066130855
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18066130855
18066130855
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+8618066130855
Email
haishuoenergy@haishuoairsep.com
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