What quality inspections and tests does Huilin carry out before its nitrogen (and oxygen) generators leave the factory?

Our PSA nitrogen and oxygen generation systems feature modular, customizable design. Flow rate, purity, output pressure and dew point can be adjusted on demand. They suit conventional indoor industrial operating conditions and also support special conditions such as explosion-proof, skid-mounted/containerized, high-temperature and dusty, and outdoor deployment, serving both domestic and export projects across multiple industries.

I. Nitrogen generators 

Electronics/semiconductor and SMT soldering: reflow soldering, wave soldering, chip packaging and 3D-printed metal powder protection; nitrogen purity 99.99%–99.999%.

Lithium battery and new materials: material drying, tank nitrogen blanketing and purging protection, with strict dew-point control.

Heat treatment, powder metallurgy and metal processing: bright annealing of copper and aluminum, quenching protection and laser cutting; purity 99.5%–99.999%.

Chemical and petrochemical: tank nitrogen blanketing, pipeline purging and replacement, and isolation protection for flammable and explosive media; explosion-proof models can be customized for hazardous areas, skid-mounted outdoor installation is supported, and pressure can be adjusted according to pipeline requirements.

Food and pharmaceutical: food nitrogen-flush preservation, pharmaceutical packaging and container replacement; equipment piping and accessories meet cleanliness requirements, with purity 99.5%–99.99%.

Rubber, plastics and grain storage: rubber vulcanization and insect-proof, oxygen-exclusion grain storage.

Other special conditions: containerized skid-mounted configurations for field construction sites and overseas projects; export models can meet certification requirements such as SABER.

II. Oxygen generators

Wastewater treatment and environmental protection: ozone generation and aeration oxygenation.

Aquaculture: oxygenation for high-level ponds and industrial recirculating aquaculture systems.

Metallurgy and furnace combustion support: oxygen-enriched combustion for non-ferrous metal smelting, glass furnaces and waste incineration.

Medical/central oxygen supply: centralized oxygen supply for hospitals and wellness centers; medical-grade configuration meeting relevant medical oxygen generation standards.

Chemical fermentation and ozone: oxygen supply for fermentation and gas source for ozone generators.

Huilin has specialized in PSA nitrogen and oxygen equipment since 2009. Across the full production process of our nitrogen and oxygen generators, we implement safety and compliance through eight dimensions:

1. Quality management system: a complete QMS with a designated management representative and a standardized CAPA process closes the loop on deviations, non-conforming products and customer feedback.

2. Design-stage compliance: vessels follow GB150 and other pressure vessel standards; export projects match rules such as ASME, ISO 8010 and SABER. Pipelines use stainless or aluminum alloy; the PLC applies safety-redundant logic with interlocks for over-pressure, over-temperature and similar conditions.

3. Incoming material control: pressure-bearing plates, valves, adsorbents, instruments and PLC components are checked against certificates and third-party reports; non-qualified sources for key parts are rejected, and non-conforming items quarantined and returned.

4. Manufacturing safety control: pressure-bearing welding follows the WPS (Welding Procedure Specification) by certified welders with complete procedure qualification. Special operations such as hot work and lifting need permits; tooling is calibrated; in-process inspection blocks non-conforming work.

5. Inspection and testing: vessels undergo NDT and hydrostatic testing; machines run air-tightness, pressure commissioning, purity and interlock tests; instruments such as pressure gauges and flow meters are calibrated periodically.

6. Documentation: each unit ships with P\&IDs, installation and electrical drawings, conformity and material certificates, welding and test records, pressure-vessel documents, operation and safety manuals and other documents; export units add matching certification under one-file-per-unit traceability.

7. Personnel: welding, NDT, inspection, quality management and similar positions are staffed by certified personnel with regular training; safety duties are assigned to individuals.

8. After-sales: HUILIN provides operation training and collects site feedback; quality or safety hazards trigger CAPA to trace root causes and prevent recurrence.

Guangzhou Huilin Air Separation Equipment Co., Ltd., established in 2009 as a national high-tech enterprise, maintains a global business layout with customers in more than 100 countries. Our company serves a highly representative group of international benchmark customers, including several Fortune Global 500 multinational enterprises, industrial customers in Europe and the Americas, government agencies, and renowned overseas universities. The repurchase rate of existing customers exceeds 45 percent, with equipment failure rate below 0.5 percent.

In terms of Fortune Global 500 customers, Huilin serves Shell, a global energy giant, meeting high-standard industrial gas requirements such as refining and process inerting. We also serves SAMSUNG, ensuring stable gas supply during the production of electronic components. Domestic Fortune Global 500 enterprises such as Huawei, CNPC, Sinopec and COFCO have repeatedly purchased Huilin nitrogen generation equipment. Long-term supporting relationships also include BYD, CATL, Wuhan Iron and Steel and Lizhu Pharmaceutical.

The company’s business deeply covers Europe and the Americas. In addition to our global cooperation with Shell, Huilin has established partnerships with industrial enterprises in Europe, the Americas and Latin America, such as Thornton and Newsan, applying domestically made nitrogen and oxygen generation equipment to local industrial scenarios such as electronics manufacturing and promoting Chinese air separation technology into European and American markets.

For overseas higher-education and research institutions, Huilin provides oxygen and nitrogen generation equipment to universities and research organizations such as Michigan Technological University (USA), Victoria University of Wellington (New Zealand), Korea National University, and the Russian Academy of Sciences, supplying stable nitrogen and oxygen gas sources for research experiments in materials, chemical engineering and other fields, and supporting overseas research and teaching work.

Meanwhile, our company’s business also extends to Africa and other regions in Asia, establishing cooperation with local industrial enterprises and public institutions, and forming a global customer landscape highlighted by serving Fortune Global 500 companies, European and American markets, and overseas universities.