A November 3, 2026 report from SteelHome says that L415Q carbon dioxide transport seamless pipe developed and produced by Baogang Steel’s pipe division has been successfully applied in a Xinjiang CCUS demonstration project. SteelHome described the pipe as the highest-grade seamless pipe then applied in a domestic supercritical CO₂ transport project.
The report follows an October 28 article published by Mysteel and attributed to Baogang Steel. The November 3 update adds that Baogang’s production control covered stages including rare-earth microalloying, casting, piercing, rolling and heat treatment. It also says the company followed the pipe’s storage, welding and installation at the project site.
The reports do not disclose the full pipe datasheet, detailed test values, project design code, order quantity or complete inspection records. The reported application is an industry development, but it should not be treated as a complete technical qualification record for other projects.
One issue highlighted in the reports is the temperature drop that may occur during depressurization and venting. As CO₂ rapidly flashes and absorbs heat, local temperatures in the described scenario may fall to around or below −60°C. If a pipe material has not been properly assessed for the relevant conditions, low-temperature brittle fracture can become a concern.
That figure needs context. It refers to a local temperature drop during a particular depressurization or venting scenario, not the pipeline’s continuous operating temperature. Normal operation, start-up, shutdown, emergency depressurization and maintenance can involve different combinations of pressure and temperature. The project design basis needs to address the scenarios that apply.
Low-temperature toughness is only one part of material qualification. Depending on the project, engineers may also need to consider strength, ductility, weldability, fracture initiation and propagation, chemical composition, product consistency, inspection coverage and traceability. Test temperatures, acceptance criteria and sampling frequency must come from the governing specification and project requirements.
The standards landscape is developing alongside CO₂ transport projects. On June 2, 2026, the American Petroleum Institute (API) announced the publication of the 47th edition of API Specification 5L (API Spec 5L), Line Pipe. API said the edition introduced updates across more than 15 topic areas, including requirements related to CO₂ transmission pipelines and high-frequency welded pipe quality.
API Spec 5L addresses the manufacture of seamless and welded steel line pipe, including material specifications, manufacturing processes, inspection, testing, marking and traceability. Its updated CO₂-related provisions are relevant to line-pipe manufacturing, but citing API Spec 5L alone does not establish that a particular pipe is suitable for every CO₂ service.
Another relevant reference is API Recommended Practice 1192 (RP 1192), Transportation of Carbon Dioxide by Pipeline, published on December 17, 2025. API describes RP 1192 as providing performance requirements and guidance for the design, construction, operation and management of CO₂ pipelines. Its scope addresses supercritical and liquid-phase CO₂ transportation, as well as gas-phase transportation.
The two documents serve different purposes: API Spec 5L addresses line-pipe product and manufacturing requirements, while RP 1192 provides broader guidance for CO₂ pipeline systems. Neither removes the need to assess material suitability against the project’s design code, service conditions, technical specification and owner requirements.
Buyers should also avoid treating grade designations as automatic equivalents. A grade name or minimum yield-strength value does not, by itself, establish equivalent toughness, chemistry, weldability, manufacturing route or acceptance under a project-specific CO₂ pipeline specification. Any proposed material substitution needs formal technical review and approval.
For a CO₂ pipeline project, an RFQ needs to communicate more than a grade and nominal size. Suppliers need enough information to understand the design envelope and the inspection and documentation scope. Buyers should clarify four groups of requirements:
This checklist is not a substitute for engineering design. It is intended to help procurement teams make project requirements visible before suppliers prepare a commercial offer.
The reported L415Q application is a useful signal that CCUS projects can require pipe materials assessed for service conditions that differ from conventional oil and gas transportation. It also underlines the connection between material development and field application: laboratory properties, manufacturing consistency, welding and installation practices all contribute to project performance.
For buyers, the practical lesson is not simply to look for a higher-strength grade. The more important step is to define the full service envelope and identify the properties that matter for the project. A material that meets a strength target may still need additional evidence for low-temperature toughness, fracture control, corrosion management or welding performance.
The reports do not establish that every L415Q pipe is suitable for every supercritical CO₂ project. Nor do they mean that a conventional oil and gas line pipe can be transferred directly into CO₂ service without further assessment. Suitability remains project-specific.
Baogang’s reported L415Q seamless pipe application in Xinjiang brings attention to a demanding part of the CCUS value chain: transporting CO₂ through a pipeline that may experience a wide range of operating and transient conditions. The reported low-temperature challenge is a reminder that toughness and project-specific material qualification matter alongside strength.
For procurement teams, the starting point should be the project specification, not a grade name alone. Confirm the design basis, applicable standards, pipe dimensions, required tests, traceability and approval process before comparing quotations.
For general information about Shengtao Metal’s seamless steel pipe range, visit the Seamless Steel Pipe category. Product suitability for CO₂ service must be assessed separately against the project’s design and qualification requirements. This article does not imply that Shengtao Metal’s listed products are qualified for supercritical CO₂ service.
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