Explore our primary pipeline defense engineering lines, manufactured to international standards under rigorous quality control.
In modern pipeline transportation systems—whether transporting natural gas, crude oil, desalinated water, or petrochemical materials—the integrity of the pipeline is of paramount importance. While factory-applied parent coatings (such as 3LPE, 3LPP, or FBE) shield the majority of the steel pipe surface, the field joint area (where individual pipes are welded together on-site) remains the most vulnerable interface. This is where Thermo Shrink Sleeves (also known as heat shrinkable sleeves or wrap-around sleeves) act as a vital protective barrier.
As a premier China Thermo Shrink Sleeve Supplier & Factory, CYCT New Materials has spent decades engineering high-performance field joint coatings that prevent external corrosion. The science behind heat-shrinkable materials involves radiation cross-linked polyethylene backing paired with a protective, viscoelastic hot-melt adhesive layer. When heat is applied, the polymer backings structural "memory" causes it to shrink tightly around the pipe substrate, melting the inner adhesive to form a cohesive, impervious seal against soil stress, moisture penetration, and chemical degradation.
Our pipeline engineering approach does not merely replicate standard designs. By collaborating with advanced scientific bodies like the CNPC Pipeline Science Research Institute, we design multi-layered coatings that offer enhanced resistance to cathodic disbondment and mechanical impact, maintaining integrity under high-temperature environments (up to 85°C and beyond).
How CYCT utilizes domestic industrial cluster optimization to deliver high-specification materials globally.
By operating near major polymer production hubs, we source high-density polyethylenes and specialty elastomers with complete batch traceability, maintaining structural integrity across varying regional microclimates.
CYCT is a state-level high-tech enterprise. Our in-house research facilities are certified under national accreditation standards, ensuring each thermo shrink sleeve batch complies with project specifications.
Leveraging marine and rail shipping routes, we coordinate reliable material shipments to project sites in the Middle East, Southeast Asia, South America, and Europe, preventing project delays.
International oil and gas infrastructure demands strict compliance with global engineering frameworks. CYCT’s product range is formulated to exceed the requirements of standard certifications including ISO 21809-3, EN 12068, and NACE RP0303.
Our products undergo comprehensive performance testing inside our CNAS-accredited national laboratory. This includes evaluating:
Anti-corrosion materials require proper installation to ensure long-term effectiveness. CYCT provides comprehensive field joint coating design schemes, installation instructions, and inspector training. We support EPC contractors globally, helping to minimize application errors during installation.
Global engineering procurement departments balance performance specifications, delivery lead times, and financial budgets. Choosing CYCT as your supplier provides several key advantages:
We provide customized roll dimensions, thickness options (e.g., standard duty, heavy duty), and specialized adhesives for cold or hot climates. This flexibility minimizes material waste and helps maintain project schedules.
The pipeline industry is shifting toward more environmentally friendly materials and smart inspection technologies. CYCT is currently developing several advanced solutions:
Our solvent-free viscoelastic putties (VE Putty) and tapes provide continuous self-healing properties without posing environmental or occupational health hazards, protecting flanges, valves, and T-joints.
For trenchless installations, pipelines encounter high mechanical friction. Our specialty photo-curing sleeves and GRF moisture-curing shields protect the underlying anti-corrosion coating from scratch damage during pullback.
As oil extraction reservoirs operate at higher temperatures, we offer customized polymer formulations that maintain structural integrity above 85°C.
CYCT New Materials Company Limited (for short, CYCT) is a state-level high-tech enterprise integrating R&D, production and sales of pipeline corrosion protection materials as well as buried pipeline detection service and pipeline coating field application service into one. CYCT has dedicated itself to the R&D, production, and sales of pipeline corrosion protection materials for decades.
CYCT owns leading testing and R&D capabilities, a professional R&D team, and a national CNAS-accredited laboratory. We are a stable supplier of field joint coatings for PetroChina, Sinopec, PipeChina, and local pipeline networks, holding a significant domestic market share. Furthermore, CYCT has developed and introduced a number of specialty corrosion protection materials, such as visco-elastic anticorrosion materials, special photo-curing sleeves for HDD protection, and polyurea coatings.
By cooperating with leading R&D institutes such as the CNPC Pipeline Science Research Institute, CYCT is capable of providing in-service pipelines with varied technical services, including buried pipeline detection, design schemes, cathodic protection, rehabilitation projects, and integrated solutions for pipeline safety.
CYCT is a Council Member of the Chinese Society for Corrosion and Protection (CSCP) and holds formal Qualification Certificates for Corrosion Protection Construction and Pipeline Detection. We are recognized as an established brand for pipeline corrosion protection in China and are a Corporate Member of the China Association of Petroleum Engineering Construction (CAPEC). In addition to our domestic partner network, we are an approved supplier for the Indian Oil Corporation.
Common questions answered by our anti-corrosion engineering team.
A 2-layer system consists of a radiation cross-linked polyethylene backing coated internally with a thick mastic or hot-melt adhesive. A 3-layer system uses a liquid epoxy primer applied to the bare steel first, followed by the heat-shrinkable sleeve. The 3-layer system generally offers higher resistance to cathodic disbondment and is suited for high-temperature pipelines.
Viscoelastic tape remains in a cold-flow, amorphous state that physically flows into surface micro-roughness without requiring preheating. Hot-melt sleeves rely on a semi-crystalline polymer structure that must melt to form a bond. Viscoelastic systems are often selected for rehabilitation and complex-shaped fittings, while hot-melt sleeves are standard for long-distance transmission lines.
The main global standards are ISO 21809-3 (governing field joint coatings for petroleum and natural gas pipelines) and EN 12068 (specifying classes A, B, and C based on operating temperature and mechanical resistance).
In HDD installations, the pipe is pulled through soil and rock, exposing the joint to high shear forces. Standard thermo shrink sleeves can peel or tear. A photo-curing sleeve or GRF moisture-curing shield provides a hard outer shell that protects the primary anti-corrosion layer from abrasion.
Our raw materials are inspected at receipt, and critical parameters—including polymer extrusion thickness, radiation dosing for cross-linking, and adhesive layer thickness—are monitored throughout production. Finished batches undergo peel strength and cathodic disbondment testing in our CNAS-accredited laboratory.
Discover additional specialized repair and protection products designed for industrial pipeline infrastructure.
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