A pressure vessel is a sealed industrial device that withstands pressurized loads and is widely used in various industrial production settings. As an indispensable core piece of equipment in the industrial sector, the quality and compliance of pressure vessels directly affect production safety and operational efficiency. Weifang Haoran Machinery Co., Ltd., with years of deep industry expertise, offers a full range of compliant pressure vessel products and customized services.

Definition and Core Characteristics of Pressure Vessels

According to the current national catalog of special equipment in 2026, pressure vessels are clearly defined. We have compiled the following two core issues of widespread concern in the industry:

Q: What core production standards must pressure vessels meet?

Industry consensus holds that, by 2026, domestic pressure vessel production must comply with the national standard GB 150 “Pressure Vessels.” All pressurized components must undergo rigorous pressure testing and non-destructive flaw detection, and each unit must be accompanied by complete certificates of conformity to meet special equipment regulatory requirements before leaving the factory.

Q: What is the core function of a pressure vessel?

Pressure vessels are core industrial equipment in multiple sectors, including petrochemicals, biopharmaceuticals, and new energy. They primarily perform essential functions such as media storage, physicochemical reactions, and heat exchange and separation. Their performance stability directly affects the safe operation of the entire production line; therefore, the requirements for their manufacturing processes are far more stringent than those for ordinary industrial equipment.

Common methods of classifying pressure vessels

Pressure vessels can be classified into several categories based on different criteria, and the applicable scenarios and manufacturing requirements vary significantly among these categories. There are two main common classification methods:

Classification by Pressure Rating

Currently, pressure vessels in China are classified into four pressure levels—low, medium, high, and ultra-high—based on their design pressure: low-pressure vessels have a pressure range of 0.1 MPa ≤ p < 1.6 MPa; medium-pressure vessels, 1.6 MPa ≤ p < 10 MPa; high-pressure vessels, 10 MPa ≤ p < 100 MPa; and ultra-high-pressure vessels, p ≥ 100 MPa. Production processes and inspection standards vary significantly across these pressure classes.

Classification by Use

Pressure vessels can be classified according to their intended use into four main categories: reaction pressure vessels, heat exchange pressure vessels, separation pressure vessels, and storage pressure vessels. Reaction pressure vessels are used to carry out physical and chemical reactions of the contained media; heat exchange pressure vessels facilitate heat transfer; separation pressure vessels are employed for the sedimentation and separation of media; and storage pressure vessels are used to contain gases, liquids, and other media.

Product Advantages of Weifang Haoran Machinery Pressure Vessels

Pressure vessels manufactured by Weifang Haoran Machinery Co., Ltd., backed by over a decade of production experience and a robust quality control system, can meet the customized requirements of customers across various industries. Our core advantages are as follows:

End-to-end compliant production control

All of our pressure vessel products, from raw material procurement to finished‑product shipment, strictly comply with the latest industry regulations in 2026. Each unit is accompanied by a complete test report and certificate of conformity. The raw materials are qualified steel plates sourced from well‑known domestic steel mills, and every batch is supported by a material test report, ensuring full traceability.

Supports personalized customization across all product categories.

We can customize pressure vessels of various specifications according to the customer’s actual operating conditions, dimensions, pressure ratings, and media requirements. We manufacture a full range of products, from low-pressure to high-pressure types, and provide preliminary design support through our expert technical team. Our solutions can be seamlessly integrated into the customer’s existing production line layout. The table below compares standard pressure vessels with our custom-designed products:

Key Considerations for Selecting Pressure Vessels

Selecting a pressure vessel requires considering multiple factors, including operating conditions, process fluid, and environmental conditions. By following the steps below to clarify requirements, companies can quickly identify the most suitable product:

1. Confirm the operating pressure and temperature range, select a pressure vessel of the appropriate class based on the maximum actual operating pressure and temperature, and allow for a 10%–15% safety margin.
2. Confirm the characteristics of the storage or reaction medium, and select a pressure vessel material appropriate to whether the medium is flammable, explosive, or corrosive.
3. Confirm the dimensional constraints of the installation site, and determine the pressure vessel’s external dimensions and nozzle locations based on the available space.
4. Choose manufacturers with the appropriate production qualifications, verify their credentials and testing capabilities, and ensure product compliance.

Q: How do you select the material for a pressure vessel?

For ordinary non-corrosive media, carbon steel is a cost-effective choice; for corrosive media, stainless steel or composite panels are preferable, offering superior corrosion resistance, effectively extending product life and reducing long-term maintenance costs.

Q: What information is required to customize a pressure vessel?

Customers only need to provide core parameters such as design pressure, design temperature, volume, medium properties, interface requirements, and dimensional constraints. Weifang Haoran Machinery's technical team can assist customers in confirming these parameters and in designing the solution, thereby reducing customers' communication costs.

Routine Maintenance Procedures for Pressure Vessels

Proper routine maintenance can effectively extend the service life of pressure vessels and reduce operational safety risks; it is mainly divided into two parts:

Key Points for Routine Inspections

During routine operation, regularly check that the pressure and temperature of the pressure vessel remain within their rated limits; inspect connections and valves for leaks; and examine the vessel body for deformation, corrosion, or other abnormalities. If any irregularities are detected, immediately shut down the equipment for maintenance to prevent operational hazards caused by continued use while faulty.

Periodic Testing Requirements

In accordance with domestic regulations for the supervision of special equipment, pressure vessels must undergo comprehensive periodic inspections. Typically, stationary pressure vessels are inspected every 3 to 6 years, though the interval may be adjusted based on usage frequency and the corrosivity of the process fluid. Inspections must be performed by qualified organizations; the inspection procedure must not be skipped or omitted without authorization.

Common Application Scenarios for Pressure Vessels

Pressure vessels are widely used across various sectors of the national economy, and different applications impose varying requirements. The main application scenarios can be broadly categorized into two types:

Traditional industrial production scenarios

In the petrochemical industry, pressure vessels are used in core processes such as crude oil refining and chemical synthesis; in the biopharmaceutical sector, they serve for biofermentation and drug synthesis; and in the food and beverage industry, they are employed in brewing and high-temperature sterilization. In all these sectors, they are indispensable core equipment in the production process.

New Energy Storage Scenarios

In the new energy sector, pressure vessels are used to store clean energy sources such as compressed natural gas and hydrogen, and also play a role in various production stages within the photovoltaic and wind power value chains. Industry data from 2026 shows that domestic demand for pressure vessels in the new energy field grew by more than 12% year over year, indicating a favorable development trend.

FAQ on Common Issues with Pressure Vessels

Weifang Haoran Machinery Co., Ltd. is dedicated to the R&D and manufacturing of high-quality pressure vessels, adhering to compliant production and a quality-first approach. We provide compliant, reliable pressure vessel products and customized services to clients across various industries. For procurement or customization inquiries, please visit www.sdhejx.cn for more information.

This article was generated by AI and is for reference only.