SHANDONG BAIMAOXING STEEL CO., LTD.
Your Premier Strategic Partner in High-Performance Stainless Steel and Non-Ferrous Metals
Located in Liaocheng City, Shandong Province, China, Shandong Baimaoxing Iron and Steel Co., Ltd. is a leading comprehensive steel enterprise integrating advanced R&D, high-precision processing, global sales, and professional engineering technical services. We specialize in providing food-grade sanitary raw materials and component products that strictly comply with international hygienic standards.
Our diversified product portfolio covers carbon steel products (steel pipes, plates, round bars, coils, angle bars, flat bars, I-beams, galvanized steel coils, PPGI), stainless steel series (plates, coils, pipes, bars, profiles), and non-ferrous metals (copper, aluminum, titanium plates, bars, tubes, coils).
Adopting a science-driven management system and strict quality control standards, our products are widely trusted and applied in key industries including food processing, dairy, beverages, biotechnology, pharmaceuticals, aerospace, petrochemicals, and precision machining.
Food-Grade Stainless Steel Standards & Grades Cross-Reference
Understanding the relationship between chemical composition, mechanical properties, and international hygiene regulations is critical to preventing contamination in food machinery.
Key Global Compliance Frameworks Explained
When engineering sanitary food processing lines, raw materials must satisfy multiple local and global regulatory standards to verify safety against chemical migration:
- GB 4806.9-2016: China’s National Food Safety Standard for food contact metal materials, mandating rigorous migration limits for heavy metals (Arsenic, Cadmium, Lead, Chromium, Nickel).
- GB/T 3280 & GB/T 14976: General Chinese standards governing cold-rolled stainless steel plates and seamless stainless steel tubes respectively, establishing base alloy composition limits.
- ISO 2037: International Standard specifying dimensions, tolerances, and surface roughness of stainless steel tubes for the food industry.
- 3-A Sanitary Standards (USA): Developed by the dairy industry to ensure equipment is fully cleanable, self-draining, and free of physical crevices.
- FDA 21 CFR 177.2600 & food contact guidelines: US FDA regulations ensuring that metal contact surfaces are chemically inert and do not degrade under CIP conditions.
| Material Grade (US/ASTM) | Chinese Equivalent (GB) | European Standard (EN) | Primary Chemical Composition | Key Hygiene Standards Compliance | Corrosion Resistance Level |
|---|---|---|---|---|---|
| 304 | 06Cr19Ni10 | 1.4301 | 18% Cr, 8% Ni | GB 4806.9, ISO 2037, 3-A, FDA | High (Standard Food Grade) |
| 316L | 022Cr17Ni12Mo2 | 1.4404 | 16% Cr, 10% Ni, 2% Mo | GB 4806.9, ISO 2037, 3-A, FDA | Extreme (Acid & Chloride Resistant) |
| 430 | 10Cr17 / 06Cr17 | 1.4016 | 16-18% Cr, Ni-free | GB 4806.9 (limited contact) | Moderate (Dry Food / Non-Acidic) |
Hygienic Suitability in Industrial Food & Pharma Scenarios
Different food media contain varying concentrations of organic acids, salts, and cleaning chemicals. Choosing the correct grade prevents catastrophic pitting corrosion and stress corrosion cracking.
Dairy Processing
Medium: Lactic acid, milk fats, and high-temperature cleaning cycles.
Critical Risk: Biofilm accumulation in microscopically rough surfaces and crevice corrosion under gaskets.
Recommended: 316L or 304 with electropolished (EP) finish.
Beverage & Brewery
Medium: Carbonic acid, citric acid, sulfur dioxide, and live yeast cultures.
Critical Risk: Pitting corrosion from acidic fermentation processes and localized microbial contamination.
Recommended: 304 or 316L with Bright Annealed (BA) finish.
Meat & Seafood
Medium: Extremely high sodium chloride (salinity), organic blood acids, and fat proteins.
Critical Risk: Rapid chloride-induced pitting corrosion and stress cracking on structural frames.
Recommended: Strict 316L with polished or passivated finishes.
Baking & Confectionery
Medium: Dry powders, high heat (ovens), dough, sugars, and fats.
Critical Risk: High-temperature oxidation, structural wear from mechanical kneading, and magnetic metal separation.
Recommended: 304 for general lines; 430 for magnetic dry sorting.
Pharmaceutical & Biotech
Medium: Ultra-Pure Water (WFI), active chemical reactions, and aggressive sterile steam sterilization.
Critical Risk: Trace elemental contamination and biological spore colonization in micro-pores.
Recommended: ASME BPE Grade 316L Electropolished (Ra < 0.38 μm).
Custom Engineering
Need custom material recommendations based on your plant's specific chemical concentrations and CIP parameters?
Surface Finishes, Roughness ($R_a$) & Hygiene Ratings
The biological cleanability of a food contact surface is directly determined by its micro-roughness ($R_a$). Smoother surfaces prevent bacterial adhesion and increase CIP effectiveness.
| Finish Name | Process Description | Surface Roughness ($R_a$ Value) | Hygiene Rating & Bacterial Adhesion Risk | Typical Food Machinery Applications |
|---|---|---|---|---|
| 2B (Cold Rolled Matte) | Cold rolled, heat treated, pickled, and skin-passed with polished rolls. | 0.40 μm - 1.00 μm | Medium Risk | External housings, structural supports, non-contact dry product areas. |
| BA (Bright Annealed) | Cold rolled and heat treated in a controlled, oxygen-free atmosphere. | 0.10 μm - 0.30 μm | Very Low Risk | Direct food contact plates, milk storage vats, internal pipe systems. |
| Brushed (No.4 / HL) | Mechanical polishing with fine abrasives (150-240 grit). | 0.40 μm - 1.50 μm | Medium-High Risk (directional grooves) | Aesthetic paneling, kitchen equipment cladding, external frames. |
| Mirror (8K) | Multi-stage mechanical polishing with progressively finer buffing compounds. | < 0.05 μm - 0.10 μm | Very Low Risk | High-purity hoppers, chute walls, pharmaceutical process vessels. |
| Pickling & Passivation | Chemical acid treatment to remove oxides and enrich chromium content. | Depends on substrate (typically > 1.0 μm) | Medium Risk (rough but inert) | Heavy-duty structural industrial mixing tanks, piping weld joints. |
| Electropolishing (EP) | Anodic electrochemical dissolution of microscopic peaks and valleys. | < 0.20 μm - 0.38 μm (ultra-smooth) | Absolute Lowest Risk | Aseptic tubing, pharmaceutical bioreactors, critical dairy piping. |
Optimal "Material + Surface" Application Matrix
Avoid catastrophic design failures by utilizing our engineering matrix matched against clean-in-place (CIP) chemicals and sterilization temperature profiles.
Harshest Operating Environments
For operations involving high-temperature steam sterilization (SIP) above 121°C, or cleaning with aggressive sodium hydroxide (caustic soda) and nitric acid mixtures:
- Piping Systems: 316L Stainless Steel + Electropolished (EP) finish is mandatory to eliminate corrosion at weld seams and prevent micro-pitting.
- Pressure Vessels: BA or Mirror 8K finish prevents chemical scaling on tank walls.
- Structural Cladding: 304 with No.4 Brushed finish provides cleanability and structural protection against daily washdowns.
Why Standard Cold Rolled (2B) Isn't Always Enough
While 2B is highly economical, its microscopic surface profile contains minute cold-rolling fissures. In liquid food contact lines:
- These fissures harbor bacteria, which can survive light CIP wash cycles.
- Over time, standard 2B surfaces under chloride or acid exposure can develop localized pitting.
- Upgrading to BA (Bright Annealed) or EP reduces sanitization chemical usage by up to 40% and extends machinery lifespan.
Advanced One-Stop Precision Processing Services
Shandong Baimaoxing Steel Co., Ltd. provides customized, end-to-end processing to deliver ready-to-assemble components directly to your factory floor.
Decoiling & Slitting
Precision conversion of heavy coils into custom flat sheets or narrow steel strips with tight tolerances.
Laser Cutting & Bending
High-power CNC fiber laser cutting and multi-axis bending for complex food machinery parts and vessel walls.
Tube Rolling & Welding
State-of-the-art automatic longitudinal welding lines for pharmaceutical-grade sanitary tubing.
Polishing & Passivation
Mechanical internal ID/OD polishing and chemical passivation bath lines matching strict sanitary specs.
✗ Purchasing Raw Materials Separately
- High Material Waste: Sourcing standard sheet sizes results in up to 15-25% structural scrap during custom cutting.
- Logistical Bottlenecks: Coordinating shipping between raw suppliers, cutting shops, and polishers adds significant transit delays.
- Quality Disputes: Risk of damage or contamination during multi-step transportation and third-party processing.
✓ Integrated Shandong Baimaoxing Supply Chain
- Zero Waste Cost: Buy components cut-to-size and shaped to your exact blueprints. We recycle processing scrap in-house.
- Accelerated Lead Times: Raw sourcing, decoiling, laser profiling, and finishing are completed under one roof.
- Unified Certified Quality: One single Material Test Certificate (MTC) and rigorous QA inspection covering the entire cycle.
Detailed Stainless Steel Product Specifications
Our standard inventory dimensions and customized processing limits are engineered to meet strict food machinery design requirements.
Stainless Steel Sheet & Plate
Standard flat sheets and high-thickness heavy plates are widely processed into food mixing tanks, storage silos, and pasteurization vats.
| Standards | ASTM A240, GB/T 3280, JIS G4304, EN 10088-2 |
| Grades | 310S, 309S, 316, 316L, 321, 304, 304L, 201, 202, 430, 904L, Duplex 2205 |
| Surface Finishes | 2B, 2D, BA, No.1, No.4, No.8, 8K Mirror, Hairline, Sand Blast, Brushed, Embossed |
| Thickness Range | 0.05 mm - 150 mm |
| Width Range | 1000 mm, 1219 mm, 1500 mm, 1800 mm, 2000 mm, 2500 mm, 3000 mm (Customizable) |
| Length Range | 2000 mm, 2440 mm, 3000 mm, 5800 mm, 6000 mm (Customizable) |
Stainless Steel Sanitary Pipe & Tube
Seamless and welded fluid pipes engineered with smooth internal walls to facilitate high-velocity CIP cleaning cycles.
| Standards | ASTM A312, ASTM A269, ASTM A213, DIN 17456, JIS G3459, GB/T 14976, ISO 2037 |
| Grades | 304, 304L, 316, 316L, 321, 310S, 201, 202, 400 Series |
| Surface Finishes | Bright Annealed (BA), Pickled & Annealed, Mechanically Polished (ID/OD), EP |
| Outer Diameter (OD) | 6 mm - 2500 mm (3/8" - 100") |
| Wall Thickness | 1 mm - 150 mm (SCH10 - XXS) |
| Length | 4000 mm, 5800 mm, 6000 mm, 12000 mm (Customizable) |
Stainless Steel Coil
Continuous coils designed for high-efficiency automatic stamping, deep drawing, and continuous laser-profiling processing lines.
| Main Materials | 201, 202, 301, 302, 303, 304, 304L, 310S, 316, 316L, 317L, 321, 410, 420, 430, 904L |
| Width Range | 500 mm - 2500 mm (Customizable) |
| Thickness Range | 0.03 mm - 300 mm (Customizable) |
| Surface Treatments | No.1, 2B, BA, No.4, HL, Mirror, Protective Film Lamination |
| Technique | Cold Rolled / Hot Rolled |
| Custom Processing | Flattening, Slitting, Film Laminating, Laser Cutting |
Structural Stainless Steel (Bars, Angles, Flat Bars)
Solid round bars, heavy structural angles, and hot-rolled flat bars for food machinery frames, shafts, and support systems.
Round Bars
Diameters: 1mm - 800mm
Grades: 304, 316L, 321, 410, 420, 430
Surface: Bright, Polished, Peeled, Black
Angle Steel
Sizes: 20*20mm - 200*200mm
Thickness: 3mm - 20mm
Processing: Custom Cutting, Punching, Drilling
Flat Bars
Widths: 10mm - 300mm
Thickness: 3mm - 60mm
Edges: Slit Edge / Rounded Edge
Advanced Production, Packaging & Real Cases
Our state-of-the-art facility guarantees that every product leaves our factory in pristine hygienic condition, protected against damage during global transit.
Rigorous Seaworthy Packaging
To prevent salt spray corrosion, moisture damage, and physical deformation during long-distance oceanic freight, we utilize heavy-duty export packaging:
- Waterproof paper wrapping with plastic edge protectors.
- Heavy-duty steel strapping on reinforced wooden pallets or wooden cases.
- Surface protective films (PE or laser film) on all polished plates and tubes to prevent scratches.
Global Engineering Cases
Our food-grade stainless steel products are successfully deployed in high-profile international food processing plants:
- Dairy Piping: Supplied over 500 tons of 316L EP tubing to dairy processing plants in Europe.
- Brewery Silos: Supplied 304 BA coils for the production of large-scale beer fermentation tanks in South America.
- Pharma Vessels: Provided high-precision electropolished mirror plates for vaccine mixing vessels in Southeast Asia.
Frequently Asked Technical Questions (FAQ)
Get answers to the most common technical questions asked by food machinery design engineers and procurement departments.
Quality & Qualification Certificates
Our production facilities operate under strict quality management systems to ensure full traceability and compliance with international standards.
Request a Customized Material Selection & Processing Quote
Submit your specific food processing environment parameters, cleaning protocols, and dimensions. Our engineering team will analyze your requirements and provide an optimized "Stainless Steel Grade + Surface Finish" solution with factory-direct pricing.
Direct Contact Information
WENDY - SALES MANAGER
Tel / WhatsApp / Wechat: +86-15216350333
Email: baimaoxingsteel@gmail.com
Official Website: baimaoxingsteel.com