Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of anti-corrosion steel pipe for water supply and drainage systems in China. Welcome to buy discount anti-corrosion steel pipe for water supply and drainage systems made in China here from our factory. Quality products and low price are available.
Product introduction
Product Description
Anti-corrosion Steel Pipe for Chemical and Marine Industries is a high-performance anti-corrosion steel pipe specially engineered for chemical processing pipelines, marine engineering structures, offshore platform piping, seawater desalination systems, coastal industrial pipelines, and chemical storage and transportation. Manufactured strictly to international anti-corrosion and structural standards including ASTM A312, GB/T 14976, EN 10217-7, API 5L + NACE MR0175, it adopts corrosion-resistant alloy steel strips (austenitic stainless steel, duplex stainless steel, chromium-alloy steel) and advanced ERW/TIG welding technology, combined with professional anti-corrosion coating processes. Featuring excellent resistance to chemical corrosion (acids, alkalis, salts), seawater corrosion, stress corrosion cracking, and uniform anti-corrosion layer adhesion, this pipe can operate stably in harsh chemical and marine environments for a long time. Widely used in petrochemical plants, offshore oil and gas platforms, seawater cooling systems, chemical reagent transportation, and coastal infrastructure, it provides reliable, durable, and safe anti-corrosion piping solutions for chemical and marine industries worldwide.
Basic Product Specifications
Product Name: Anti-corrosion Steel Pipe for Chemical and Marine Industries
Executive Standard: ASTM A312, GB/T 14976-2012, EN 10217-7, API 5L + NACE MR0175, GOST 9941-2022
Manufacturing Process: ERW (Electric Resistance Welding)/TIG Welding, precision strip cold forming, high-frequency continuous welding, weld annealing, stress-relieved heat treatment, full-line NDT inspection, professional anti-corrosion coating (3PE, FBE, hot-dip galvanizing)
Steel Grade: 304, 316L (austenitic stainless steel); 2205, 2507 (duplex stainless steel); S-400 (chromium-alloy steel); X70QS (anti-acid pipeline steel) – all corrosion-optimized grades[2]
Outer Diameter (OD): 15mm – 630mm, DN15-DN600 customizable (covering small-caliber instrument pipes to large-caliber transmission pipes)
Wall Thickness (WT): 2mm – 20mm, heavy-wall up to 30mm for high-pressure chemical and offshore applications
Standard Length: 6m, 9m, 12m, custom fixed lengths up to 15m (matching marine platform and chemical plant installation space)
Delivery Condition: Annealed + stress-relieved, pickled and passivated, anti-corrosion coated, ensuring corrosion resistance and structural stability
Surface Finish & Anti-corrosion Treatment: - Inner surface: Pickled and passivated, polished (Ra≤1.6μm) for chemical fluid transmission; - Outer surface: Hot-dip galvanizing, 3PE (polyethylene) coating, FBE (fusion-bonded epoxy) coating, or epoxy zinc-rich primer + topcoat – all meet marine and chemical anti-corrosion requirements[2]
Pipe End: Precision beveled ends (for seamless welding with marine/chemical fittings); flanged ends (for quick connection in chemical pipelines); threaded ends (for small-caliber instrument pipes)
Application: Chemical plant fluid transmission pipelines, offshore platform piping (cargo oil pipes, water ballast pipes), seawater desalination systems, coastal industrial cooling pipelines, chemical reagent storage and transportation pipes, offshore wind power auxiliary pipelines, marine vessel piping systems[1][2]
Grade & Process Explanation
Corrosion-Resistant Steel Grade Performance: Selected corrosion-optimized steel grades are tailored to chemical and marine harsh environments. 316L stainless steel contains molybdenum, enhancing resistance to chloride ion corrosion (ideal for seawater and salt-containing chemical media); 2205/2507 duplex stainless steel has high strength and excellent stress corrosion cracking resistance, suitable for offshore high-pressure applications; S-400 chromium-alloy steel (containing 1% chromium) forms a dense rust layer that inhibits oxygen infiltration, reducing seawater corrosion rate to half of ordinary steel[1]; X70QS anti-acid steel is designed for H₂S-containing environments, resisting hydrogen-induced cracking (HIC) and sulfide stress corrosion cracking (SSC)[2]. All grades have strict impurity control, ensuring long-term corrosion resistance in harsh media.
Welding Process Advantages for Anti-corrosion Pipes: ERW/TIG welding technology is adopted for continuous full-penetration welding without filler metal, ensuring weld density and corrosion resistance consistent with the base metal. Post-weld annealing and stress relief eliminate residual stress, avoiding stress corrosion cracking in corrosive environments – a key risk in chemical and marine applications. Welds are polished and passivated to remove oxidation layers, preventing weld corrosion. Compared with seamless pipes, ERW anti-corrosion pipes offer higher production efficiency, more stable dimensional accuracy, and lower cost, suitable for large-scale chemical and marine project supply.
Chemical & Marine-Oriented Anti-corrosion Design: Optimized for harsh corrosion environments, including chemical media (acids, alkalis, salts, organic solvents) and marine environments (seawater, humidity, salt spray). The double anti-corrosion protection (corrosion-resistant base metal + professional coating) isolates the pipe from corrosive media, extending service life to over 30 years. Strict dimensional tolerance ensures seamless connection with marine/chemical fittings, while the smooth inner surface avoids medium residue and contamination, protecting chemical production and marine equipment. Special anti-corrosion coating thickness control (3PE coating ≥3.0mm) ensures adhesion and wear resistance during transportation and installation[2].
Dimensional Tolerance (Chemical & Marine Anti-corrosion Standard)
|
Item |
Tolerance |
|
Outer Diameter |
±0.5% of nominal OD (max ±1.0mm) |
|
Wall Thickness |
+10% / −8% of nominal WT (corrosion-grade tolerance) |
|
Out‑of‑Roundness |
≤0.8% of outer diameter |
|
Straightness |
≤1.5 mm per meter |
|
Length |
+100 mm / −0 mm (precision cutting for marine installation) |
Mechanical Properties (Chemical & Marine Corrosion Requirements)
|
Property |
304/316L Stainless Steel |
2205/2507 Duplex Stainless Steel |
S-400 Chromium-Alloy Steel |
|
Minimum Yield Strength |
≥205 MPa |
≥450 MPa |
≥245 MPa |
|
Tensile Strength |
≥515 MPa |
≥620 MPa |
≥400 MPa |
|
Elongation |
≥40% |
≥25% |
≥28% |
|
Hardness (HB) |
≤201 |
≤290 |
≤180 |
|
Hydrostatic Test |
100% tested at 1.5× working pressure |
100% tested at 1.5× working pressure |
100% tested at 1.5× working pressure |
|
Corrosion Test |
Pass ASTM A262 |
Pass ASTM G48 |
Seawater corrosion rate ≤0.05mm/a |
Note: Corrosion tests (intergranular corrosion, pitting corrosion, stress corrosion cracking) are mandatory for chemical and marine applications to ensure the pipe can resist harsh corrosive media. For H₂S-containing chemical environments, additional HIC/SSC tests (per NACE TM0177/TM0284) are available[2][3].
Chemical Composition (Max. %, Corrosion-Resistant Steel Grades)
|
Element |
C |
Mn |
P |
S |
Cr |
Ni |
Mo |
|
316L Stainless Steel |
≤0.03 |
≤2.00 |
≤0.045 |
≤0.030 |
16.00-18.00 |
10.00-14.00 |
2.00-3.00 |
|
2205 Duplex Stainless Steel |
≤0.03 |
≤2.00 |
≤0.030 |
≤0.020 |
21.00-23.00 |
4.50-6.50 |
2.50-3.50 |
|
S-400 Chromium-Alloy Steel |
≤0.15 |
≤1.00 |
≤0.035 |
≤0.035 |
0.80-1.20 |
≤0.30 |
≤0.10 |
Residual elements: Cu ≤0.50%, Ti ≤0.30%, N ≤0.22% (for duplex stainless steel). High chromium, nickel, and molybdenum content forms a dense passive film on the pipe surface, effectively isolating corrosive media and ensuring long-term corrosion resistance[1][2].
Manufacturing Process
Raw Material Inspection: Strict chemical composition and mechanical property testing of corrosion-resistant steel strips, impurity content verification, and surface quality inspection; special corrosion resistance pre-testing for marine and chemical grade materials[2].
Precision Strip Cold Forming: High-precision forming rolls ensure uniform wall thickness, high roundness, and consistent dimensional accuracy, avoiding stress concentration and corrosion weak points.
ERW/TIG Welding: Continuous full-penetration welding with intelligent temperature and pressure control; TIG welding optional for small-caliber high-precision pipes, ensuring weld uniformity and no internal defects[2].
Weld Annealing & Stress Relief: Eliminate residual stress, refine grain structure, enhance pipe ductility and corrosion resistance, avoiding stress corrosion cracking in harsh chemical and marine environments.
Pickling & Passivation: Remove surface oxidation layer and welding slag, form a dense passive film on the pipe surface, enhancing inherent corrosion resistance[2].
Anti-corrosion Coating: Professional coating process (3PE, FBE, hot-dip galvanizing) with strict thickness control and adhesion testing; inner surface polishing for chemical fluid transmission to avoid medium residue.
100% NDT Inspection: Ultrasonic testing for weld defects; visual inspection for surface and coating quality; dimensional accuracy testing for each pipe; optional RT/TOFD detection for critical offshore projects[2][3].
Finishing: Precision cutting to fixed lengths, pipe end processing (beveled/flanged/threaded), anti-corrosion treatment of pipe ends, standard marking for identification.
Product Advantages
Excellent Corrosion Resistance: Corrosion-resistant base metal + professional anti-corrosion coating, resisting chemical media (acids, alkalis, salts) and seawater corrosion, suitable for harsh chemical and marine environments[1][2].
Stable Weld Quality: ERW/TIG welding + post-weld annealing, weld corrosion resistance and mechanical properties consistent with the base metal, no corrosion weak points[2].
Wide Grade Selection: Multiple corrosion-resistant steel grades available, tailored to different chemical media and marine working conditions (e.g., 316L for seawater, 2205 for high-pressure offshore, S-400 for general marine applications)[1][2].
Durable Anti-corrosion Coating: High-adhesion, wear-resistant coating, resistance to salt spray, humidity, and mechanical damage, extending service life to over 30 years[2].
High Structural Strength: Excellent mechanical properties, withstanding high pressure, vibration, and marine environmental loads, ensuring structural stability[2].
Easy Installation & Compatibility: Strict dimensional tolerance, compatible with standard chemical and marine fittings, reducing on-site construction time and errors.
Cost-Effective & Efficient Production: ERW process with high production efficiency, suitable for large-scale chemical and marine project supply; balanced cost and performance compared with seamless corrosion-resistant pipes[2].
Complete Quality Traceability: MTR reports, SGS/BV/DNV third-party inspection available, meeting chemical and marine industry quality standards and project acceptance requirements[2][3].
Main Applications
Petrochemical plant fluid transmission and reaction pipelines (acid, alkali, organic solvent media)
Offshore oil and gas platforms (cargo oil pipes, water ballast pipes, auxiliary pipelines)[1]
Seawater desalination systems and seawater cooling pipelines
Coastal industrial plant cooling and fluid transmission pipelines
Chemical reagent storage and transportation pipelines
Offshore wind power generation auxiliary pipelines
Marine vessel piping systems (seawater, fuel oil transmission)
H₂S-containing oil and gas transmission pipelines (X70QS grade)[2]
Quality Inspection & Certification
Full dimensional inspection of OD, wall thickness, straightness, roundness, and length (100% inspection for corrosion grade)
Tensile, bend, hardness, and hydrostatic pressure tests to ensure mechanical performance
100% ultrasonic weld inspection; optional RT/TOFD detection for critical offshore projects[2][3]
Corrosion performance tests: intergranular corrosion (ASTM A262), pitting corrosion (ASTM G48), stress corrosion cracking (NACE TM0177), HIC/SSC tests (for H₂S environments)[2][3]
Heat-batch chemical composition analysis for corrosion-resistant grade verification[2]
Anti-corrosion coating inspection: thickness, adhesion, and salt spray tests (≥1000 hours salt spray resistance)
Mill Test Report (MTR), third-party inspection (SGS, BV, DNV) available for chemical and marine industry acceptance[2][3]
Packaging & Delivery
Packaging: Anti-corrosion coating protection with PE film, bundled with soft steel strips, wrapped in waterproof and anti-collision woven cloth, steel end caps for pipe end protection; special packaging for marine transportation to avoid coating damage during shipping.
Marking: Anti-corrosion Steel Pipe, Chemical & Marine Use, steel grade, size, anti-corrosion coating type, heat number, batch number, corrosion resistance grade.
Trade Terms: FOB, CIF, CFR, DAP, DDU (supporting offshore project delivery requirements)
Shipping Ports: Tianjin, Qingdao, Shanghai, Ningbo (major coastal ports with professional loading equipment for marine-grade pipes)
Customization: Custom size (OD/WT), steel grade, anti-corrosion coating type (3PE/FBE/hot-dip galvanizing), length, and pipe end form supported to match specific chemical and marine project requirements[2].
Contact Us
For quotation, stock availability, delivery schedule and customized anti-corrosion solutions of Anti-corrosion Steel Pipe for Chemical and Marine Industries, please contact our sales team. We have rich experience in supporting global chemical and marine engineering projects, providing corrosion-resistant steel pipes that meet international standards, and professional technical support for on-site installation, welding, and anti-corrosion maintenance, ensuring the safe, stable, and durable operation of your chemical and marine piping systems.
About us
Hebei Huayang Steel Pipe Co., Ltd. was founded in 2005, with a registered capital of 500 million yuan. The company covers an area of more than 1,000 mu, with annual sales of 10 billion yuan, more than 600 employees and an annual productivity of 2.75 million tons. The company has 17 new automatic steel pipe production lines and 14 high-frequency production lines, with a diameter of 73-660 mm; Three double-sided submerged arc welded steel pipe production lines with diameters of 406.4-1422.4mm;; 24 hot tube expanding production lines, with a diameter of 230-820mm; Two anticorrosion steel pipe production lines with a diameter of 73-1626 mm; 2 automatic painting production lines. With 3 branches and 5 offices, the products are sold to various cities and exported to more than 80 countries such as Southeast Asia, Middle East, Europe and America.
Packaging, transportation and delivery
Packaging, transportation and delivery
At Hebei Huayang Steel Pipe Co., Ltd., we apply standardized and reliable packaging solutions for all our steel pipe products. Our pipes can be securely packed by hexagonal bundling or circular bundling according to product diameter, wall thickness and customer requirements. Each pipe end is protected with high‑strength plastic pipe caps to avoid collision damage, dust and moisture during transportation and storage. The whole bundle is firmly wrapped with durable woven bags to enhance stability and prevent scratches or deformation.
We support a complete range of transportation methods to satisfy global customers, including road transportation, railway transportation, sea freight and container shipping. Based on our strategic location in Cangzhou, Hebei Province, we enjoy convenient access to major ports such as Tianjin Port, which greatly improves logistics efficiency and reduces transportation costs.
For standard specifications and normal order quantities, the general delivery time is about 30 days after order confirmation and deposit receipt. For large‑scale orders, special sizes or customized processing requirements, our production and sales team will formulate a detailed production plan and provide an accurate delivery schedule accordingly to ensure on‑time supply and stable performance for projects and clients worldwide.
Strict quality control
1. During and after the production, experienced quality inspectors randomly check the products to ensure that each steel pipe is qualified for production and application.
2. A nationally recognized laboratory with CNAS certification and certification by French Classification Society.
3. Have CNOOC access certificate, KOC oil company access network, ADNOC Abu Dhabi oil company access network, Petrobras access network, etc.
4. Accept the inspection by the third party designated/paid by the buyer, such as SGS and BV.
Certifications
API 2B
API 5L
GOST
ISO 9001
EN 10219
EN 10210
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