Sihe Steel
Sihe Steel
Direct mill supply of pre-insulated, plastic-jacketed, and bare precision-drawn tubing designed to perform under high pressure and corrosive conditions.
Malaysia sits at the heart of the Asia-Pacific maritime trade route, housing critical deepwater hydrocarbon fields off the coasts of Sabah, Sarawak, and Terengganu, alongside rapid downstream expansions such as the Pengerang Integrated Petroleum Complex (PIPC) in Johor. These environments present a major challenge to industrial infrastructure: continuous exposure to high ambient temperatures, elevated relative humidity, and aggressive airborne marine chlorides.
Standard bare stainless steel tubing, when exposed to these conditions on offshore platforms or coastal chemical plants, is susceptible to Chloride Stress Corrosion Cracking (CSCC) and pitting. To mitigate these risks, regional operators are transitioning to Stainless Steel Encapsulated Tubing. By extruding a continuous polymer jacket—typically PVC, HDPE, TPU, or FEP—directly over precision-drawn alloy cores, we create an impermeable physical barrier against corrosive agents.
This hybrid approach extends the operational lifespan of hydraulic control systems, chemical injection lines, and subsea umbilicals from a typical 3-5 years to over 25 years. This longevity reduces maintenance outages and operational expenditure across Malaysia's energy and chemical hubs.
Liaocheng Sihe Stainless Steel Material LTD processes specialized alloys to strict international standards (GB, ASTM, ASME, JIS, EN). Our encapsulation lines apply heavy-duty thermoplastic jackets to provide reliable chemical and mechanical protection.
| Alloy Grade | Common Standard | PREN Value | Primary Jacketing Material | Typical Applications in Malaysia |
|---|---|---|---|---|
| 316L (UNS S31603) | ASTM A269 / A213 | 23 - 25 | PVC / TPU / FEP | Standard offshore chemical injection & instrumentation lines |
| Duplex 2205 (UNS S31803) | ASTM A789 / A790 | 34 - 36 | TPU / HDPE | High-pressure subsea hydraulic controls, downhole instrumentation |
| Super Duplex 2507 | ASTM A789 / A790 | > 40 | TPU / PVDF | Deepwater oil fields off Sabah & Sarawak, highly sour gas wells |
| Alloy 825 (UNS N08825) | ASTM B163 / B423 | 31 - 32 | TPU / PVDF / FEP | Corrosive downhole tubing, geothermal wells, acid gas processing |
| Inconel 625 (UNS N06625) | ASTM B444 | > 45 | FEP / PFA | Extreme temperature, highly acidic chemical dosing in refineries |
Our advanced extrusion heads ensure a uniform jacket wall thickness, preventing weak spots susceptible to tearing or moisture ingress during bending.
In-line bright annealing in a controlled hydrogen atmosphere removes internal stresses, yielding a smooth ID finish and high ductility for installation.
We manufacture single continuous orbital-welded or seamless coils up to 32,800 feet (10,000 meters) to reduce connection points in long-run umbilicals.
Explore our specialized alloy coiled tubes, polished heat exchanger tubing, and precision capillaries designed for clean energy, petrochemical, and automotive assemblies.
At Liaocheng Sihe Stainless Steel Material LTD, we support a range of material configurations (304, 316L, 2205) and outer diameters (from 3.175mm to 25.4mm) to meet your project specifications.
We manufacture encapsulated lines with custom wall thicknesses (up to 3.0mm) and specific outer diameters to match your existing valves, hydraulic fittings, and subsea connectors.
Our custom capabilities include precision drawing, continuous spiral coiling, and compact bend forming for localized heat exchangers, marine condensers, and analyzer panels.
We supply clean, deburred tube ends using modern laser cutting or mechanical orbital cutting, ready for immediate field welding or compression fitting connection.
In addition to standard jacketing, we provide pickling, electro-polishing, and color-coded polymer coatings (e.g., blue for hydraulics, yellow for chemical lines) for process identification.
We process flanged ends and swaged connectors for automotive exhaust setups, chemical distribution loops, and aerospace instrumentation to ensure leak-free operation.
All custom-drawn and encapsulated tubes undergo hydrostatic pressure testing and electrical spark testing (up to 15kV) to ensure zero micro-cracks in the polymer barrier before shipment.
Our tubing is used across demanding sectors, from offshore platforms to cleanrooms, automotive, and power generation systems.
Thermal management systems in maritime environments require continuous high-ductility coils to maintain stable heat transfer efficiency.
Ensures corrosion protection for refrigerant fluid paths in humid coastal installations and offshore marine HVAC packages.
Protects chemical transfer and dosing lines against localized external corrosion from airborne acid gases and chemicals.
Sanitary processing lines that require smooth, easy-to-clean external polymer surfaces to prevent bacterial buildup.
High-purity capillary lines and process lines with electropolished inner surfaces to meet strict hygienic standards.
Steam tracer lines, condenser loops, and boiler control loops exposed to high temperatures and cyclic mechanical loading.
Hydrocarbon sampling bundles, steam trace heating loops, and sensor lines in refineries and petrochemical parks.
Precision fuel rails, high-pressure hydraulic actuators, and structural lines designed to minimize weight while maintaining strength.
Direct mill prices on standard, welded, and capillary coiled options. Select the alloy grade and dimensional range required for your offshore or onshore project.
To support demanding offshore projects, we enforce strict quality assurance procedures. Each coil undergoes non-destructive testing (NDT) to verify wall thickness, alloy chemistry, and mechanical properties before shipment.
100% in-line testing at high pressures guarantees structural integrity and prevents subsurface micro-flaws along the tube weld seam.
High-sensitivity gas bubble testing is applied to verify leak-free performance in high-pressure capillary control systems.
Material deformation testing confirms the tube can handle tight bend radii and field flare-fitting connections without cracking.
Liaocheng Sihe Stainless Steel Material LTD is a direct mill manufacturer specializing in stainless steel coiled tubing, polished tubing, and seamless capillary systems. Equipped with six modern production lines, we fabricate tubing in standard austenitic grades like 304/304L, 316L, 321, 317L, 309S, 310S, duplex alloys like 2205 and 2507, and nickel superalloys like Alloy 800, Alloy 825, and Inconel 625.
We supply critical components for deepwater oil and gas operations, semiconductor manufacturing, aerospace assemblies, automotive exhaust systems, and heat exchanger plants. Our facility features advanced in-line bright annealing lines to ensure uniform softening, clean internal surfaces, and high ductility.
With over a decade of production history, we serve contractors and distributors in over 30 countries across Southeast Asia, North America, Western Europe, and the Middle East, offering custom sizing, color-coded jacketing, and project-specific documentation.
Detailed technical and commercial answers regarding our encapsulated stainless steel tubing supplies to Malaysia.
Get in touch with our engineering team for customized wall thicknesses, specialized polymer coatings, and factory-direct volume pricing. We provide comprehensive design assistance and door-to-port shipping solutions.
