Engineered for high-pressure natural gas trunklines, city gas distributions, and heavy-duty utility corridors across Chonburi, Rayong, and Greater Bangkok industrial estates.
Designed for buried long-distance natural gas transmission with external 3LPE, 3LPP, and internal liquid epoxy linings resistant to high humidity and tropical saline soil.
Hot-dip galvanized and carbon steel pipes meeting ASME B31.8 pressure piping protocols for Thai combined-cycle power facilities and urban utility reticulation.
API 6D ball valves, globe check valves, and high-integrity emergency shutoff valves specifically assembled to match pipeline wall thicknesses and flange ratings.
Corrosion-engineered multi-layer piping systems addressing plant water cooling circuits, fire suppression loops, and secondary gas-drainage applications.
A strategic overview of industrial gas transmission projects, LNG terminal-to-grid pipelines, and the rising demand for certified Chinese steel tubular supply.
Thailand’s Eastern Economic Corridor (covering Rayong, Chonburi, and Chachoengsao) represents the highest concentration of heavy industrial energy consumption in Southeast Asia. The phase-out of coal-fired utilities in favor of combined-cycle gas turbine (CCGT) power and SPP (Small Power Producer) industrial cogeneration requires continuous pipeline infrastructure upgrades connecting to PTT's 5th Transmission Pipeline and Map Ta Phut LNG Terminals (1 & 2).
Urbanized clusters in the Bangkok Metropolitan Region (Samut Prakan, Pathum Thani, Nonthaburi) demand dense intermediate-pressure gas feeder networks. With heightened industrial zone safety regulations enforced by the Department of Energy Business (DOEB), EPC contractors require strict metallurgical verification and mill integrity to avoid catastrophic failure in densely built environments.
Piping laid through the low-lying alluvial plains of Central Thailand and the coastal mudflats of the Gulf of Thailand faces acute external galvanic corrosion, high ground water tables, and biological sulfate-reducing bacteria (SRB). Standard black or poorly galvanized pipes experience premature pit leaks. The market requires heavy 3-Layer Polyethylene (3LPE) or 3-Layer Polypropylene (3LPP) with high cathodic disbondment resistance conforming to ISO 21809-1.
International engineering contractors operating in Thailand cannot afford customs delays or project rejections caused by substandard documentation. Supplying steel pipe into Thailand demands conformance to Thai Industrial Standards Institute (TIS 427, TIS 107) or international equivalents including API 5L PSL2, ASTM A106, and ASME B31.8, verified via 3.1/3.2 Mill Test Certificates with full heat trace logs.
Detailed metallurgical matrix matching Chinese national standards (GB/T) against Thai (TIS), American (API / ASTM), and European (EN) criteria for pressurized hydrocarbon conveying.
| Standard & Grade | Min. Yield (MPa) | Tensile (MPa) | Coating / Protective System | Thai Application Scenario | Testing & Inspection Protocols |
|---|---|---|---|---|---|
| API 5L Gr. B / X42 (PSL1/2) GB/T 9711 L245 / L290 |
245 - 290 | 415 - 495 | FBE (Fusion Bonded Epoxy) / Hot-Dip Galv (HDG) | City gate distribution, industrial boiler feedlines (Samut Sakhon) | Hydrostatic testing (100%), Ultrasonic weld seam scan |
| API 5L X52 / X60 (PSL2) GB/T 9711 L360 / L415 |
360 - 415 | 460 - 520 | 3LPE (DIN 30670 / ISO 21809-1 Class B/C) | Underground arterial lines connecting LNG spurs to SPP power plants | Full-body UT, CVN impact test @ 0°C, DWT test |
| API 5L X65 / X70 (PSL2) GB/T 9711 L450 / L485 |
450 - 485 | 535 - 635 | 3LPP (High-temperature rating up to 110°C) | High-pressure cross-country mainlines (PTT 4th & 5th lines link) | 100% X-ray / Radiographic weld inspection, HIC & SSCC tested |
| ASTM A106 Gr. B / A53 Gr. B GB/T 8163 20# Steel |
240 | 415 | Black varnish, anti-corrosive primer coating | Refinery manifold piping, chemical plant interconnects (Rayong) | Flattening test, flaring test, magnetic particle test |
| TIS 427 / TIS 107 Equivalent Q235B / Q355B Line Tubing |
235 - 355 | 370 - 510 | Zinc coating ≥ 500 g/m² (70µm thickness) | Above-ground utility structural supports, plant fence & drainage | Zinc adhesion cross-hatch, salt spray ASTM B117 > 720 hrs |
For wet gas conveying containing traces of CO2 and H2S, our steel undergoes calcium treatment for inclusion shape control and sulfur reduction (S ≤ 0.002%), preventing Hydrogen-Induced Cracking (HIC).
Offered with compound beveling (30° to 35° with 1.6mm root face) tailored for fast mechanized orbital welding deployed by EPC line crews along Thai pipeline trenches.
Every single length of pipe is laser-marked or die-stamped with mill tracking numbers, outer diameter, wall thickness, grade, and API monogram referencing raw coil heat certificates.
Combining world-class production economics, unmatched raw material clustering, and dedicated direct sea logistics straight to Laem Chabang & Bangkok Port.
Located in Jinghai District, Tianjin, HZXY sits at the heart of the world's most dense steel processing agglomeration. Rolling mills, slitting facilities, high-frequency ERW mills, spiral LSAW plants, and 3LPE coating bays are all situated within an ultra-efficient 15 km trucking radius, drastically compressing lead times and production overheads.
Direct container and break-bulk charter vessels depart weekly from Tianjin Xingang port. Transit times to Laem Chabang Port typically range between 9 to 14 days, offering Thai contractors prompt replenishment cycles, lower warehousing carrying costs, and total supply flexibility compared to Western manufacturers.
We routinely host independent international inspectors (SGS, BV, TÜV, Lloyd’s Register) appointed by Thai clients. Verification covers optical emission spectroscopy (OES) chemical validation, hydrostatic test holds (10-15 seconds at up to 50 MPa), peel strength tests for 3LPE coatings, and end-bevel squareness checks.
Where custom-engineered gas transmission line pipes, structural supports, and industrial pipe networks serve national infrastructure.
Conveying feedstock natural gas, methane, and ethane across multi-tier coastal pipe racks under severe salt-air conditions. Pipes require anti-corrosive multi-coat polyurethane exterior and heavy-gauge schedule carbon steel.
Feeding pressurized fuel gas directly into gas turbines at power plants across Ayutthaya, Saraburi, and Chonburi. Pipes operate at elevated pressures (up to 70 bar) necessitating strictly certified API 5L PSL2 line pipe with Charpy V-notch toughness.
Horizontal Directional Drilling (HDD) underneath the Chao Phraya River, irrigation canals, and expressways. Pipes demand reinforced 3LPE/3LPP with abrasion-resistant overcoat (ARO) to withstand severe pull-through mechanical friction.
How modern pipeline manufacturing supports Thailand's National Energy Plan 2024 and ASEAN decarbonization pledges.
As Thailand explores blending green hydrogen into natural gas networks (up to 10-20% H2 blends), pipeline steel must demonstrate extreme resistance to hydrogen embrittlement and micro-crack propagation. HZXY provides low-carbon, low-sulfur steel formulations with controlled hardness (< 22 Rockwell C) compatible with future ASME B31.12 hydrogen transmission requirements.
Modern line pipes feature tightly controlled internal diameter (ID) tolerances and high-grade internal flow coatings (epoxy liners 40-60 µm). This slick interior reduces friction factor, lowers pump-station compressor electrical usage across long distances, and permits smooth passage of MFL (Magnetic Flux Leakage) smart pigs for continuous wall-loss monitoring.
Straightforward answers regarding customs, certification, lead times, corrosion protection, and project consolidation.
Yes. Every export lot destined for high-pressure gas service is certified strictly in accordance with EN 10204 Type 3.1 Mill Test Certificates. The documentation contains full heat traceability, ladle chemical analysis, tensile values, yield ratios, Charpy V-notch impact test curves at 0°C or sub-zero temperatures, and 100% hydrostatic and NDT (Non-Destructive Testing) inspection results. Third-party sign-off (Type 3.2 inspection by SGS, BV, or DNV) can be arranged prior to vessel dispatch.
For buried pipelines across coastal or marshland terrains, we provide factory-applied 3LPE (Three-Layer Polyethylene) coating per DIN 30670 and ISO 21809-1. The system consists of an electrostatic fusion bonded epoxy primer (FBE), a high-bonding copolymer adhesive layer, and an outer high-density polyethylene (HDPE) topcoat. For lines operating above 60°C or in high thermal zones, 3LPP (Three-Layer Polypropylene) is applied. In addition, our pipe ends are sealed with heavy-duty bevel protectors and waterproof end-caps to avoid marine salt contamination during shipping.
All shipments from our Tianjin port facilities qualify for the China-ASEAN Free Trade Agreement (Form E). Upon issuance of the official Form E Certificate of Origin by Chinese customs authorities, Thai importers can clear qualified steel products and line pipes at zero or preferential import tariff rates into Laem Chabang, Bangkok (Klong Toey), or Map Ta Phut ports, significantly optimizing overall procurement capital expenditure (CAPEX).
Absolutely. One of HZXY’s strongest competitive edges is complete project bill-of-materials (BOM) consolidation. Because we operate 1,500 acres of production capacity across Tianjin and Tangshan covering structural H-beams, angle steels, hot-rolled coils, rebar, steel pipe, and industrial valves, EPC clients can bundle pipes with structural steel pipe racks and control valves in unified container lots or break-bulk vessels, streamlining project management and eliminating multi-supplier shipping friction.
Complete project sourcing directly from Tianjin and Tangshan production facilities to support foundation structural frames, plant racks, and secondary piping.
Heavy wide-flange structural H-beams engineered for pipeline support trestles, warehouse platforms, and plant column frames.
Slotted and equal/unequal angle steels hot-dip galvanized to withstand coastal plant humidity without rust degradation.
Structural U and C profile channel steel utilized extensively across industrial energy estates in Chonburi and Rayong.
Engineered flat bars suitable for electrical grounding grids, pipeline pipe saddles, clamps, and machinery base shims.
Continuous mill coil stock used for localized spiral pipe fabrication, equipment chassis, and heavy mechanical press stamping.
High-tensile deformed rebar for compressor station foundations, pump-house slabs, and heavy deep-well pile reinforcement.
Durable polymer and metallic protective conduits laid parallel to gas pipelines for real-time SCADA pressure monitoring systems.
Engineered drainage pipelines providing rapid gravity stormwater removal around LNG vaporizers and refinery processing units.
