2. More Than 2 Years Of Experience In Pressure Vessel Riveting And Welding, Able To Complete Riveting And Welding Work Independently;

2. More than 2 years of experience in pressure vessel riveting and welding, able to complete riveting and welding work independently;

If you want to get a high salary to study technology, just a welding gun is not enough. At present, many scientific research institutes are recruiting personnel to carry out special material riveting and welding experiments. A college degree and two consecutive years of experience are only the entry threshold, and the valid pressure vessel welding qualification certificate in hand is the key. Liepin, a recruitment platform, issued a warm reminder to remind everyone to check overseas labor qualifications to prevent fraud.

What exactly does riveting and welding of special materials do?

Riveting work and welding work specifically for pressure vessels may sound traditional, but services for experimenting with special materials are indeed a completely different story. In April 2026, a materials research institute in Beijing had just completed a batch of welding experiments on titanium alloy high-pressure tanks. The welds had to withstand a pressure of more than 200 MPa, which is ten times more difficult than ordinary building steel structure welding. The operator must first understand the complex engineering drawings. The bevel angle, blunt edge size, and assembly gap marked on the drawings. Each number has a direct impact on the subsequent welding quality.

Welding experimental services are not just as simple as spot welding. Data presented by an organization in Shanghai that plays a third-party testing role shows that in the past year, the number of scientific research projects they have undertaken is more than 30, and 60% of the projects are special material riveting experimental services provided by scientific research institutes , because welders are interpreting the drawings. There are obstacles in the joints that lead to the final scrapping of the test piece and become a scrap. As a welder, you must have the ability to independently handle all the processes of the complete process starting from blanking, through bevel processing, and then to assembly and spot welding. During each step of the process, parameters such as temperature, current, and interlayer temperature must be recorded in detail, and finally a complete set of experimental reports will be formed accordingly.

Is a college degree plus two years of experience enough?

Many job seekers believe that a college degree is not qualified to engage in scientific research experiments. However, the actual situation is exactly the opposite. By the end of 2025, those with more than 2 or 2 years of experience in pressure vessel riveting welding will be able to complete riveting work independently. A report issued by the Chinese Mechanical Engineering Society pointed out that in the field of pressure vessel special material welding, proficiency The shortage of technicians has reached 120,000. Among them, those with a college degree or above and two or three years of practical experience are the most popular special materials riveting and welding experimental services provided by scientific research institutes . When recruiting such positions, scientific research institutes pay more attention to whether you can stably output qualified welds, rather than how beautifully written the paper is.

During the actual operation, completing the riveting and welding work alone means that you have to master both cold working and hot working techniques. Take a project in March 2026 by a research institute in Nanjing as an example. They have to weld experimental tanks of nickel-based alloys. Such materials are very sensitive to heat input and will crack once overheated. A welder with two years of work experience successfully controlled the inter-layer temperature below 150 degrees by adjusting the welding speed and swing width, ensuring the accuracy of the experimental data.

Why is the pressure vessel welding qualification certificate so necessary?

Without a valid welding qualification certificate, even the qualifications required to operate a welding machine do not exist. According to regulations formulated by the State Administration for Market Regulation, welding of pressure vessels must be performed by certified welders, and each certificate corresponds to a specific welding method, material category and test piece form. For example, if you get a SMAW (Stick Arc Welding) certificate, you cannot operate GTAW (Tungsten Argon Arc Welding) related equipment.

What is often overlooked is the validity period of certificates. According to statistics from a headhunting company in Hangzhou in the first quarter of 2026, nearly a quarter of the resumes submitted to riveting and welding positions in scientific research institutes have expired or are about to expire. Recruitment We will strictly check the issuance date and reexamination record on the certificate. Once it expires, no matter how good your skills are, you will not be able to pass the entry review. Therefore, if you want to take on experimental work with special materials, the first step is to take out your welder certificate and check the validity period.

Special requirements for riveting and welding experiments by scientific research institutes

When it comes to manufacturing pressure vessels, what ordinary factories pursue is output and efficiency. However, when providing riveting and welding experimental services to scientific research institutes, the core lies in the accuracy of data and the traceability of the process. In November 2025, in a new material research and development project in Guangzhou, every time a welder completes a weld, he needs to use an infrared temperature measuring gun to record the interlayer temperature, and use a vernier caliper to measure the reinforcement height and width, and all data must be entered into the experimental management system.

This kind of experimental service often encounters non-standard parts. For example, an aerospace materials research institute needs to weld an oval titanium alloy shell. The wall thickness of the shell is only 3 mm, but it requires a weld coefficient of more than 0.95. Ordinary welders may directly weld the special parts provided by the research institute. The riveting welding experimental service for a variety of materials resulted in extremely serious deformation. Experienced riveting welding experimenters will first make anti-deformation tooling and perform welding in sections. After each welding section is completed, the amount of deformation will be measured and subsequent parameters will be adjusted to ultimately meet the design needs of the scientific researchers.

What pitfalls are easy for job seekers to step into?

The first pitfall is that the risk warnings given by the recruitment platform are ignored. The warm reminder on Liepin clearly states that if it is a foreign-related labor service or overseas position, then you must verify the foreign labor cooperation qualifications. In early 2026, there was a case where a welder was attracted by the high salary offered and chose to go to a Southeast Asian country to do pressure vessel welding. In the end, it was discovered that this was illegal labor. Not only could the wages not be paid, but there was also no way to return home.

The second pitfall is that the understanding of job responsibilities is extremely narrow. Many people think that to complete pressure vessel riveting and welding-related work, they only need to work. However, in fact, such positions in scientific research institutes often have to fill in experimental records, sort out welding parameters, and cooperate with non-destructive testing. In 2025, a research institute in Chengdu fired a welder because he was unwilling to fill in process records, making the entire experimental data unusable.

How to quickly match the needs of such positions

If you have a college degree, more than two years of experience, and a valid pressure vessel welding qualification certificate, you have already met the basic threshold. The next thing that needs to be improved is the ability to read pictures and the mentality of working. That kind of drawing reading is not just about being able to understand three views, but also about understanding the welding symbols on the drawings, such as the leg size of fillet welds, the groove form of butt welds, and the proportion requirements for non-destructive testing.

In terms of work mentality, scientific research experiments often require repeated corrections. For example, in February 2026, there was an experimental project at a university in Wuhan. In order to find the most suitable welding sequence, the same test piece was first welded and then dismantled, and then welded again after disassembly. This was repeated five times. Welders with a poor mentality may get bored after two or three attempts. However, those who are willing to cooperate with scientific researchers to adjust the process finally not only complete the experiment, but also master the high-temperature welding characteristics of new materials, and their own value is naturally improved.

After reading this article, you will think that in pressure vessel riveting and welding experimental services, is it more important to have a certificate to get a job, or is practical experience more critical? Welcome to the comment area to share your personal opinions. If you find it useful, give it a like and forward it to friends who are looking for this kind of job.