Vessel Fabrication

The Vessel Division subordinate to the company is primarily engaged in the production of a variety of large - and medium - scale air separation equipment and chemical engineering equipment. Throughout the years, it has accumulatively fabricated over 3,000 units of equipment, such as distillation columns, molecular sieve adsorbers, air cooling towers, buffer vessels, desulfurization towers, shell - and - tube heat exchangers, and CO₂ skid - mounted cold boxes。

The company has acquired the manufacturing licenses for D1 and D2 class pressure vessels. The company's Technical Department assumes the responsibility for the design of pressure vessels. It consists of a Design Office, a Process Engineering Office, a Documentation Room, and an Archive Room. There are six professionals engaged in the design of pressure vessels, among whom two are reviewers. To comprehensively implement the relevant laws, regulations, and standards regarding the design and manufacture of pressure vessels, and to support the implementation of the "Pressure Vessel Quality Assurance Manual", our company has appointed ten responsible engineers of various types, engaged three non-destructive testing technicians (certified with RT-II, UT-II, MT-II, and PT-II), and ten certified welders. At each stage of pressure vessel manufacturing, the company deploys engineering and technical staff as well as quality inspection personnel, thereby meeting the requirements for the manufacture of D1 and D2 class pressure vessels。

The floor area of the factory building is 2,758.5 square meters, the office building occupies 4,000 square meters, the auxiliary workshops and warehouses cover 2,535 square meters, the X - ray flaw detection chamber is 80 square meters, the welding laboratory is 30 square meters, and the pressure - testing area is 432 square meters. The company has a dedicated material storage site that is suitable for material storage. This site is demarcated into three areas: the qualified area, the unqualified area, and the area for materials awaiting inspection. There are primary and secondary welding material storage facilities, which are equipped with drying and thermal insulation equipment. The factory buildings and sites of the company meet the manufacturing and production requirements for D1 and D2 class pressure vessels and can accommodate the production of certified products.

The company possesses more than 70 units (sets) of various specialized equipment. In the workshop, there are 10 sets of 32 - ton overhead traveling cranes. Additionally, it is equipped with 20 units of equipment such as a 32×2500 three - roll plate bending machine, a φ4000 vertical turning lathe, a 2500×1200×800 heat treatment furnace, a 20×2500 plate shearing machine, a φ80 radial drilling machine, and welding roller frames. There are 23 welding machines of various types, including automatic submerged arc welding machines, alternating current (AC) welding machines, direct current (DC) welding machines, tungsten inert gas (TIG) welding machines, gas metal arc welding (GMAW) machines, and inverter welding machines. The company also owns multiple sets of equipment, such as a 500℃ welding material baking and heat - retaining box, a dehumidifier, a plasma cutting machine, and a semi - automatic oxy - fuel cutting machine. Moreover, it is equipped with 11 units of instruments and equipment including an ultrasonic thickness gauge, a directional and circumferential X - ray flaw detector, a magnetic particle flaw detector, a radiation meter, a pressure - testing water pump, and an air compressor. All major inspection and testing instruments and equipment are relatively complete and comprehensive.

The company has developed a comprehensive quality system for the design and fabrication of pressure vessels. This system is stringently implemented and functions optimally, thereby guaranteeing the safety and reliability of product quality.

Machinery manufacturing

The Machinery Department affiliated with the company is a specialized manufacturer of vertical oil - free lubrication compressors and turbine compressors. The company undertakes the manufacturing of air, oxygen, and nitrogen compressors that arefor air separation units. It continuously supplies spare parts for various compressor models and offers maintenance and repair services for compressors throughout the year. Additionally, the company is capable of processing incoming materials in accordance with the specific requirements of customers.

he machine workshop is equipped with high-quality and well-matched equipment. In recent years, by accelerating the implementation of numerical control and the adoption of larger-scale equipment, the workshop has further enhanced its processing capabilities and precision. This has enabled the company to gain a significant scale advantage in Kaifeng City. At present, the company owns a series of large and medium-sized mechanical equipment, including 1600X4000 gantry planers, T160 imported floor boring machines, 100 - 600 large grinding machines, 1250X6000 horizontal lathes, Φ800X3000 numerically controlled (NC) horizontal lathes, 1250/2500/4000/5000 vertical lathes, Z3050 - Z3063 drilling machines, straight and curve plate shearing machines, as well as NC cutting and automatic welding facilities

• Explanation of Model Codes ZW-A/B
• Z：upright compressor
• W：Non-lubricated by oil
• A：Displacement under suction conditions
• B：Discharge pressure Bar
• Exhaust volume：0℃、0.101325MPaAThe quantity of gas under [specific] conditions，Nm³/h

Selected product model numbers of piston - type oxygen compressors

Product Model	Exhaust volume Nm3/h	Inlet gas temperature℃	进气压力MPaG	Discharge pressure MPaG	轴功率KW	电机功率KW	冷却水耗量吨/h
ZW-5.3/30	350	20	0.02	3.0	61	75	25
ZW-9.2/30	550	30	0.005	3.0	95	110	30
ZW-13/30	800	25	0.015	3.0	140	160	35
ZW-16/30	1000	25	0.015	3.0	160	185	35
ZW-33/30	1800	30	0.002	3.0	300	350	40
ZW-34/30	2000	30	0.01	3.0	335	400	50
ZW-36/30	2300	30	0.02	3.0	330	400	60
ZW-49/30	3200	25	0.015	3.0	510	560	80
ZW-60/30	3600	30	0.01	3.0	580	630	100
ZW-64/30	4000	25	0.015	3.0	630	710	100
ZW-69/30	4500	25	0.02	3.0	700	800	120
ZW-90/30	5200	25	0.015	3.0	800	900	120

Selected product model numbers of piston - type nitrogen compressors

Model	Exhaust volume Nm3/h	Inlet gas temperature℃	Inlet pressureMPaG	Discharge pressure MPaG	轴功率KW	电机功率KW	冷却水耗量吨/h
ZW-6/30	350	25	0.005	3.0	55	75	25
ZW-9.7/30	550	25	0.005	3.0	95	110	30
ZW-14/30	800	25	0.005	3.0	130	160	35
ZW-18/30	1000	25	0.005	3.0	160	185	40
ZW-33/30	1800	25	0.005	3.0	300	350	50
ZW-35/30	2000	25	0.005	3.0	340	400	60
ZW-37/30	2100	25	0.005	3.0	355	400	65
ZW-56/30	3200	25	0.005	3.0	530	630	80
ZW-63/30	3600	25	0.005	3.0	590	710	100
ZW-67/30	3800	25	0.005	3.0	610	710	100
ZW-88/30	5000	25	0.005	2.5	800	900	120

Selected product model designations of turbine air compressors

Model	Gas flow ratem3/min	Inlet pressureMPaG	Discharge pressure MPaG	Axial powe KW	Electrical motor power KW
DA240-66	240	0.095	0.65	1000	1200
DA380-61	380	0.097	0.6	1814	2000
DA420-61	420	0.096	0.62	1927	2200
DA480-61	480	0.097	0.65	2150	2500
DA1200-42	1200	0.093	0.6	4380	5400
DA1240-41	1240	0.098	0.63	5200	6000
DA1760-41	1760	0.098	0.6	7650	8400
H370-6.8/0.97	375	0.097	0.68	1760	2200
H450-6.8/0.79	450	0.079	0.68	1950	2200
H500-6.5/0.97	590	0.097	0.65	2542	2800
H550-6.7/0.87	570	0.087	0.67	2400	2800
H700-6.8/0.97	700	0.097	0.68	3115	3700
H780-6.8/0.95	780	0.095	0.68	3522	4100
H835-6.5/0.85	835	0.085	0.65	3500	3900
H350-30/4.55	350	0.455	3.0	2100	2240

The installation of mechanical equipment

Kaifeng SEPAIR Yongning Mechanical and Electrical Installation Co., Ltd. was founded on April 27, 2006. Its predecessor was Kaifeng Yongning Mechanical and Electrical Installation Co., Ltd., and it is currently a wholly - owned subsidiary of Kaifeng SEPAIR Group Co., Ltd. This company holds the Installation, Renovation and Maintenance License for Special Equipment of Pressure Pipeline GC2 and has obtained the ISO9000 Quality System Certification. Kaifeng SEPAIR Yongning Mechanical and Electrical Installation Co., Ltd. is a private joint - stock enterprise that has fully developed the professional technologies required for the installation, commissioning, maintenance and renovation of complete sets of air separation equipment of various models and specifications。

The company owns lifting equipment, welding equipment, inspection equipment, etc., which can meet the requirements of pressure pipelines. It has professional technologies for welding stainless steel and non-ferrous metal pressure pipelines. There are dedicated sites for storing different materials and spare parts. The safety protection equipment is complete. The company is equipped with monitoring and detection equipment that can meet the requirements for the inspection and testing of pressure pipelines, as well as the conditions for the long - term preservation of engineering and technical archives. This is to ensure that the installation project of pressure pipelines meets the requirements of standards such as "Pressure Pipeline Code - Industrial Pipelines" GB/T 20801 - 2006.。

The engineering project division consists of six specialized construction teams: the distillation tower construction team, machinery installation team, pipeline installation team, instrumentation automation team, electrical control installation team, and anti-corrosion and thermal insulation construction team. Since its establishment 12 years ago, the company has successively provided multiple air separation units for industries including steel, non-ferrous metal smelting, chemical engineering, and the medical field. For instance, it has supplied a 15,000 - type air separation unit to Wu'an Mingfang Steel, an 8,000 - type air separation unit to Hexin Steel, a 20,000 - type air separation unit to Yuhua Steel, 20,000 - type and 15,000 - type air separation units to Puyang Steel, a 20,000 - type air separation unit to Jinding Steel, two 12,000 - type air separation units to Yunnan Xianfu Steel, and a 12,000 - type air separation unit to Guangdong Yuedong Steel, etc. Featuring high - quality engineering and stable equipment operation, the company has received extensive praise and trust from customers. At present, it has established long - term cooperative relationships with numerous domestic units.。

The company is committed to the principles of integrity, a top - priority on quality, continuous innovation, and meeting customer demands. Over the years, it has successively participated in and completed several turnkey projects of large - and medium - scale air separation equipment. Characterized by its outstanding engineering quality, the equipment has achieved a one - time successful commissioning within the specified time frame. This not only meets the requirements of users but also ensures that the equipment operates with stable performance, high safety, and reliability. As a result, the company has won extensive acclaim from its users.