Highly engineered piping components, anti-corrosion pipelines, and directional drilling accessories for global fluid transport networks.
Established in 2003, Shaanxi Kerlimar Engineers Co., Ltd. has developed a global reputation as a premier supplier and engineering partner for advanced industrial pipelines, carbon steel, alloy steel, and stainless steel materials. Over more than two decades, we have committed ourselves to providing robust manufacturing compliance, competitive pricing structure, prompt logistical delivery, and unparalleled technical support.
Our complete material production range conforms rigorously to international regulatory protocols including ASTM, ASME, EN, and JIS. By bridging advanced metallurgical processing with strict quality assurance, Kerlimar ensures that pipeline networks in chemical, municipal heating, oil, and gas sectors operate at peak structural integrity under extreme temperature limits.
Under the visionary leadership of our Chairman, Mr. Ming SUN—an ardent environmental advocate and technological innovator—Shaanxi Kerlimar has actively integrated sustainable clean energy initiatives into its core engineering capabilities. Confronted with the realities of global climate change, Mr. Sun has guided the company's research portfolio towards cutting-edge, green technologies.
Initiated in 2019 under national guidelines for sustainable development, our R&D wing developed breakthrough designs in Vertical Axis Wind Turbine (VAWT) technology. By addressing typical engineering constraints in wind capture efficiency, Kerlimar has developed a portfolio focusing on magnetic levitation (maglev), advanced grid structures, land-based and offshore floating suspension configurations, and high-tensile structural cables. This engineering focus has secured more than 40 national and international patents, cementing our transition toward a decarbonized industrial future.
Kerlimar's contributions to engineering and environmental technology have earned prestigious milestones. In December 2020, we secured the official National High-Tech Enterprise designation. Following this, we participated in the prestigious China-Finland High Technology Match Conference (2021) and won the Excellence Award at the 11th China Innovation and Entrepreneurship Competition (2022).
In December 2023, Kerlimar was invited to participate in the landmark Dubai COP28 Climate Conference, displaying our alignment with global decarbonization goals. Today, our 10kW to 500kW small-to-medium wind energy units are moving from testing phases to commercial application. This technology offers highly efficient, safe, and low-cost alternative power solutions, helping rural and urban industrial clusters move closer to the "double carbon" target and support global efforts to limit warming to under 1.5°C.
Analyzing the metallurgical, chemical, and physical structures that form modern thermal insulation pipes.
The primary core that handles fluid transport. Depending on pressure requirements, this consists of Seamless Carbon Steel for high-pressure systems, Electric Resistance Welded (ERW) steel, or Spiral Submerged Arc Welded (SSAW) pipes for large-diameter municipal distribution networks. Materials conform to ASTM A53, ASTM A106, or API 5L steel grades.
Formulated with high-density rigid polyurethane foam, injected under pressure into the cavity between the carrier pipe and the outer jacket. Boasting a closed-cell ratio exceeding 88%, the thermal conductivity (λ) remains below 0.027 W/m·K, minimizing thermal dissipation over long-distance transit.
Extruded High-Density Polyethylene (HDPE) serves as the primary barrier against environmental wear, moisture ingress, and chemical corrosion. Possessing high impact strength and environmental stress cracking resistance (ESCR), this jacket safeguards the insulation layer from damage during burial.
Why international EPC contractors choose Chinese suppliers for large-scale pre-insulated pipe fabrication.
Chinese manufacturers maintain direct, volume-contracted partnerships with leading domestic steel mills (such as Baosteel, Ansteel, and Shougang). This guarantees a steady supply of high-grade raw steel, minimizing market price volatility and securing reliable delivery timelines for large projects.
By transitioning from discontinuous molding to advanced, high-speed continuous foaming extrusion lines, Chinese factories ensure uniform foam distribution, eliminate voids, and achieve superior concentricity across pipe lengths up to 12 meters.
Close proximity to major ports (such as Tianjin, Qingdao, and Shanghai) reduces domestic transit costs. Backed by established heavy-cargo shipping lanes, suppliers can coordinate bulk break-bulk vessels and custom container configurations for oversized pipe shipments worldwide.
Ensuring mechanical and physical properties meet global performance specifications.
Defines requirements for factory-made thermally insulated bonded single pipe assemblies for directly buried hot water networks, ensuring long-term temperature stability up to 140°C.
Determines compressive properties of rigid cellular plastics, ensuring the polyurethane core resists soil loads and heavy vehicular traffic overhead.
Verifies the protective jacket matches EN 448 specifications for thermal aging and tensile elongation, avoiding premature degradation in underground environments.
Non-destructive testing (NDT) of longitudinal ERW or spiral SSAW steel welds ensures pressure containment prior to applying foam insulation.
Understanding how environmental and operational requirements dictate pipeline configurations.
Used in municipal central heating networks to transport steam or superheated water from power plants directly to residential and commercial sectors. High insulating performance is essential to prevent heat loss and maintain system efficiency.
Heavy crude oil features high viscosity at low temperatures, making transport difficult. Pre-insulated pipelines maintain processing temperatures, ensuring steady oil flow and preventing paraffin precipitation along the pipeline network.
For transporting liquified natural gas (LNG) and cryogenic fluids, where temperatures must remain below -160°C. In these applications, pipes require polyisocyanurate (PIR) insulation, specialized vapor barriers, and stainless steel carrier pipes.
Leading advancements reshaping efficiency, leak detection, and environmental sustainability in thermal distribution networks.
Modern pre-insulated pipes integrate copper alarm wires within the polyurethane layer. Connected to centralized monitoring systems, these detect moisture intrusion immediately, pinpointing the location of jacket damage within a few centimeters.
Global regulations are steering manufacturers away from HCFCs towards blowing agents with zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), such as cyclopentane and liquid CO2, reducing the overall environmental footprint.
The coupling of municipal district heating networks with renewable sources, such as wind-powered thermal storage or geothermal systems. This strategy aligns with Shaanxi Kerlimar's focus on micro-grid vertical axis wind turbine integration.
Answering the critical engineering questions raised by global pipeline procurement managers.
Precision-manufactured structural pipes, stainless steel lines, and butt-welded fittings for commercial infrastructure.
Kerlimar
