Hướng dẫn về mặt bích thép không gỉ đạt tiêu chuẩn thực phẩm, an toàn vệ sinh và chống ăn mòn trong môi trường hàng hải

Food Grade Sanitary and Marine Corrosion Resistant Flanges

Stainless steel flange manufacturers serve two critical markets: food grade sanitary applications and marine applications requiring superior corrosion resistance.

Mặt bích thép không gỉ đạt tiêu chuẩn vệ sinh thực phẩm

Food and beverage, pharmaceutical industries require flanges meeting strict hygiene standards.

Yêu cầu về vật liệu

• Grade 304/304L: General food processing
• Grade 316/316L: High corrosion resistance, acidic foods
• Grade 316Ti: Enhanced temperature resistance
• Duplex 2205: Demanding chemical environments

Surface Finish Standards

• Mill Finish: Ra 3.2 microns, non-contact surfaces
• Food Grade: Ra 0.8 microns, product contact
• Pharmaceutical: Ra 0.5 microns, sterile processing
• Electropolished: Ra 0.4 microns, high purity

Sanitary Flange Standards

• ISO 2852: International sanitary fittings
• DIN 11851: European dairy industry
• 3A Sanitary: US food industry standard
• Tri-Clamp: Quick disconnect system

Ứng dụng

• Dairy processing
• Beverage production
• Sản xuất dược phẩm
• Biotech fermentation

Corrosion Resistant Flange for Marine Use

Marine environments present extreme corrosion challenges from saltwater and humidity.

Material Selection for Marine

• 316L: General marine, boat fittings, PREN 24-26
• 2205 Duplex: Offshore platforms, PREN 32-38
• 2507 Super Duplex: Deep sea, PREN 40-45
• 904L: Seawater systems, PREN 34-38

PREN Formula

Pitting Resistance Equivalent Number: PREN = Cr + 3.3 x Mo + 16 x N

• PREN below 25: Mild corrosion resistance
• PREN 25-32: Good corrosion resistance
• PREN 32-40: Very good corrosion resistance
• PREN above 40: Excellent corrosion resistance

Ứng dụng trong lĩnh vực hàng hải

• Xây dựng tàu thủy và kỹ thuật hàng hải
• Các giàn khoan dầu khí ngoài khơi
• Nhà máy khử muối
• Hệ thống làm mát bằng nước biển

Protective Measures

• Cathodic Protection: Sacrificial anodes
• Coatings: Epoxy, zinc-rich primers
• Design: Avoid crevices and water traps
• Regular inspection and cleaning

Chứng chỉ

Food Grade

• FDA 21 CFR 177 (USA)
• EC 1935/2004 (Europe)
• LFGB (Germany)

Marine Certifications

• DNV-GL
• Lloyds Register
• ABS
• CCS

Songhai Flange manufactures food grade sanitary stainless steel flanges and corrosion resistant marine flanges with international certifications.
WhatsApp: +86-18658777855
Email: 1007788887@qq.com