Stainless Steel Flange Manufacturers Food Grade Sanitary and Marine Applications

Stainless Steel Flange Manufacturers Guide

Finding reliable stainless steel flange manufacturers in your region requires understanding material grades, industry certifications, and application-specific requirements for food grade, marine, and industrial uses.

Food Grade Sanitary Stainless Steel Flanges

Food and beverage, pharmaceutical, and biotech industries require sanitary flanges that meet strict hygiene standards.

Material Requirements

• Grade: 304/304L or 316/316L stainless steel
• Surface Finish: Ra ≤ 0.8μm (32 Ra) for product contact
• Polishing: Electropolished or mechanically polished
• Certification: FDA 21 CFR 177, EC 1935/2004

Sanitary Flange Types

• Tri-Clamp: Quick disconnect, dairy industry standard
• DIN 11851: European dairy standard
• ISO 2852: International sanitary standard
• SMS: Scandinavian standard

Applications

• Dairy processing equipment
• Beverage production lines
• Pharmaceutical manufacturing
• Biotech fermentation systems
• Food processing piping

Corrosion Resistant Flanges for Marine Use

Marine and offshore applications demand superior corrosion resistance against saltwater and harsh environments.

Recommended Materials

Material	Applications	PREN
316L	General marine, boat fittings	24-26
2205 Duplex	Offshore platforms, seawater	32-38
2507 Super Duplex	Deep sea, high chloride	40-45
904L	Chemical tankers	34-38

Marine Applications

• Shipbuilding and marine engineering
• Offshore oil and gas platforms
• Desalination plants
• Seawater cooling systems
• Port and harbor infrastructure

Custom Size Flange Fabrication

For industrial pipeline projects requiring non-standard dimensions:

Customization Options

• Oversized Flanges: Up to 4 meters diameter
• Special Pressure Classes: Custom ratings
• Unique Drilling: Non-standard bolt patterns
• Special Alloys: Hastelloy, Inconel, Monel
• Heat Treatment: Solution annealing, aging

Manufacturing Capabilities

• CNC machining for precision dimensions
• Plate rolling for large diameters
• Forging for high-pressure applications
• Welding and assembly services

Stainless Steel Grade Selection

304/304L (Most Common)

• General corrosion resistance
• Food and pharmaceutical grade
• Cost-effective option
• Temperature: -200°C to 800°C

316/316L (Marine Grade)

• Superior chloride resistance
• Marine and chemical applications
• Molybdenum addition (2-3%)
• Better high-temperature strength

321 (High Temperature)

• Titanium stabilized
• Prevents carbide precipitation
• Welding applications
• Temperature up to 900°C

Export Certifications

• CE Marking: European market requirement
• PED: Pressure Equipment Directive
• ISO 9001: Quality management
• EN 10204 3.1: Material inspection certificate
• SGS/BV Inspection: Third-party verification

DN100 Flange Common Sizes

Standard	Class	OD	BC	Bolts
ASME B16.5	150	229mm	191mm	8xM16
EN 1092-1	PN16	220mm	180mm	8xM16
JIS B2220	10K	210mm	175mm	8xM16
GB/T 9115	PN16	220mm	180mm	8xM16

Lead Time and MOQ

• Standard Items: 7-15 days
• Custom Sizes: 20-30 days
• MOQ: 10-50 pieces (negotiable)
• Sample: Available within 3-5 days

Songhai Flange manufactures stainless steel flanges for food grade, marine, and industrial applications with full export certifications. Contact us for custom fabrication and wholesale pricing.

WhatsApp: +86-18658777855
Email: 1007788887@qq.com