China: new technologies in LNG plants for export? 

When they talk about Chinese technologies in LNG, many still mentally see just assembly shops. This is no longer the case, if it ever was. We are now talking about the full cycle - from our own cryogenic pumps and heat exchangers to control systems that carry the entire logic of the terminal’s operation. And export here is not just the sale of hardware, but the transfer of complex solutions that have already been burned in some places, but in others have taken root unexpectedly well in local, often imperfect, conditions.

From Code Imports to Native Platforms: The Evolution of Management

Previously, the heart of any large liquefaction plant was a foreign controller, and with it a software license that could not be touched. Now Chinese engineering companies, the same ones that grew out of large chemical holdings, are actively promoting their distributed control platforms. For example,Chengdu Yizhi Technology Co., as a design institute of the Huaxi Technology group, often integrates systems that were originally tested in chemical production into its projects. This gives an interesting hybrid: the reliability of industrial automation, adapted to the specifics of cryogenic processes.

The key shift is in the approach to “brains?” installations. Instead of buying a black box, an open architecture is being developed. This allows, say, at the same terminal near Tianjin, to flexibly change the logic of compressor operation depending on the pressure in the pipeline and even the quality of the incoming gas - something that a foreign supplier could consider an emergency situation and require additional payments for modifications.

But this is not without problems. The implementation of our own SCADA systems sometimes runs into conservatism of customers abroad. ?Do you have SIL 3 certification?? - first question. It takes a long time and tediously to prove that local Chinese certificates, for example, from the chemical industry association, are not just a piece of paper, but reflect real tests at existing facilities. One of our projects in Southeast Asia almost failed because of this, until we invited the client’s technicians to a working plant in Sichuan.

Modularity and speed: the answer to a volatile market

The trend of the last five years has been modular installations of medium productivity. The idea is not new, but Chinese engineers have taken it to an extremely pragmatic configuration. We are not talking about a simple reduction in scale, but about a fundamentally different layout. Heat exchanger MAINCRYO? like ?cold box? is now often supplied in the form of several ready-made blocks that are joined together on site. This reduces construction time from 4-5 years to 2-3.

The main driver here is not even cost, but speed to market. The buyer, whether in Africa or Central Asia, often wants to obtain LNG for local consumption or bunkering quickly, without waiting for a giant onshore terminal to be built. Chinese companies offer a turnkey solution: from the design and manufacture of modules at factories in Chengdu or Zhangjiagang to supervision of installation and commissioning.

However, modularity is a double-edged sword. We were faced with the fact that at a site in one of the CIS countries, local contractors, having no experience working with such precision blocks, tried to “modify” them. — weld additional supports. This led to thermal deformations and microcracks in the insulation. I had to urgently fly and redo it. Now contracts strictly include a clause prohibiting any unauthorized modifications by the customer.

Materials and ?cold? part: where the real savings lie

There is a lot of talk about big technologies, but real progress is often in materials. Chinese manufacturers have learned to make high-quality aluminum panel heat exchangers for mixed refrigeration cycles (MRC), which were previously the preserve of a couple of European companies. Their efficiency, of course, may still lag by a couple of percentage points, but the price and delivery time outweigh this for many projects.

This is especially true for auxiliary cryogenic equipment - shut-off and control valves for temperatures down to -196°C, submersible cryogenic pumps. Here the localization is almost complete. Companies likeChengdu Yizhi Technology Co.often act as integrators, selecting the optimal combination of equipment from various Chinese subsuppliers for specific project parameters. Their websiteyzkjhx.ru, by the way, reflects this approach well - it is not just a catalog, but a demonstration of completed projects with technical details.

But there is also a weak link - the durability of the seals and cuffs under cyclic loads. On one of our pilot plants for export, the seals on the refrigerant pumps had to be replaced three times in the first year of operation. It turned out that the Chinese material, while formally meeting the specifications, behaved worse under sudden temperature changes in the high humidity of a tropical climate. We had to rework the polymer composition together with the materials supplier.

Export of competencies, not just hardware

The most interesting process is how Chinese exports moved from “delivered and left?” to the full life cycle. The package now includes training for local operators, remote monitoring, and even contracts for periodic diagnostics using drones to inspect high-rise structures. This is no longer just a sale, but the creation of a long-term dependence on service and technological support.

For example, during the construction of a floating storage and regasification unit (FSRU) for one Baltic project, the key argument was not so much the price, but the willingness of the Chinese side to place its engineering team on the site for two years to transfer experience and adapt the technology to local emission standards.

However, cultural and regulatory barriers remain. Western partners are often suspicious of the depth of risk analysis (HAZOP) conducted using Chinese methods. We have to conduct double sessions - according to our own standards and with the involvement of international experts to legitimize the process in the eyes of the end customer. This makes the project more expensive, but has become a necessary condition for entering serious markets.

The future: hydrogen and the digital twin

Now it all comes down to two areas that are actively being tested. The first is the adaptation of the LNG infrastructure to hydrogen or its mixtures. Chinese R&D in this area is very applied: how to modify existing heat exchangers and pipelines so that they can work with H2, at least in a mixture of 20-30%. So far these are laboratory tests, but several experimental stands are already working.

The second is the development of digital twins not as beautiful visualization, but as a working tool for optimization. This is where experience comes in handy.Chengdu Yizhi Technologyas a design institute. Based on data from real objects that they designed (a registered capital of 120 million yuan allows financing such long developments), they train models to predict, for example, the formation of hydrates in pipelines or wear of an expansion turbine.

The problem is that a high-quality double requires mountains of historical data, and many Chinese installations have been operating for less than 10 years. Therefore, information is now being actively collected, sometimes even from competitors’ installations, through indirect methods. This creates a new market - a market for data on the operation of cryogenic systems, which may in the future be more valuable than the sale of the plants themselves. But this is a completely different story that is just beginning to unfold.