316L Sanitary Union For Food Pharma Grade

Pipe Fittings (Union)

High purity stainless steel piping

Pipe Fittings

Product Overview

The DN10-250 316L Sanitary Pipe Food Pharma Grade represents the pinnacle of hygienic fluid transfer technology, engineered specifically for critical applications in food, pharmaceutical, and biotech industries. Manufactured from 316L stainless steel (UNS S31603) with superior corrosion resistance, these sanitary pipes feature an electropolished internal surface with Ra values as low as 0.8μm (SF4 finish) to prevent bacterial adhesion and facilitate complete drainage. Available in nominal diameters from DN10 to DN250 (1/2" to 10"), the pipes comply with the latest ASME BPE 2025 standards and EU 2025/351 regulations, ensuring seamless integration into hygienic processing lines worldwide. The precision-manufactured tubes feature seamless construction, laser-welded joints, and sanitary fittings that eliminate dead legs and crevices – critical for maintaining product purity in applications where even minor contamination could compromise batch integrity.

Product Features

Ultra-Hygienic Surface Finish

• Electropolished internal surfaces with Ra 0.8μm (SF4) as standard, Ra 0.4μm available for critical applications

• Passivated external surface (2B finish) providing enhanced corrosion resistance

• Consistent wall thickness (±0.1mm tolerance) ensuring uniform flow characteristics

• Smooth weld transitions with <0.3mm bead height and blended contours

Precision Engineering

• Seamless construction for DN10-DN50 sizes; laser-welded for DN65-DN250

• Compliance with ASME BPE dimensional tolerances for OD/ID concentricity

• Maximum straightness tolerance of 1mm/m to ensure proper fitting alignment

• Controlled heat treatment to maintain material integrity and corrosion resistance

Sanitary Connection Options

• Tri-clamp connections (3A standard) for quick disassembly and cleaning

• Weld-end configurations with preparation for orbital welding

• Threaded connections with sanitary thread seal design (no tape/sealant required)

• Flanged connections with raised face for gasket sealing (ISO 2852 compliant)

Regulatory Compliance

• Manufactured in accordance with ASME BPE 2025 standards

• Complies with EU 2025/351 for food contact materials

• Meets FDA CFR 21 Part 177.2600 for stainless steel in food applications

• 3-A SSI 58-03 certification for dairy and food processing applications

Applications

Pharmaceutical & Biotech Industries

• API transfer lines between processing stages

• Sterile water for injection (WFI) distribution systems

• Buffer and media preparation loops

• CIP/SIP utility lines

• Vaccine production transfer piping

Food & Beverage Processing

• Dairy product transfer (milk, cream, yogurt)

• Beverage lines (fruit juices, soft drinks, beer)

• High-viscosity product transfer (syrups, sauces)

• Food-grade oil and fat distribution

• Sugar and sweetener processing lines

Cosmetic & Nutraceutical Production

• Cosmetic base transfer lines

• Nutraceutical formulation piping

• Essential oil and extract handling

• Vitamin and supplement processing

• Personal care product manufacturing

The pipes' smooth internal surfaces minimize pressure drop and prevent product buildup, making them ideal for both high-purity liquid transfer and applications involving particulates up to 5mm in size.

FAQ

What surface finish options are available?

The pipes are available with three surface finish grades:

• Standard: Ra 1.6μm (SF1) for general food applications

• Premium: Ra 0.8μm (SF4) for pharmaceutical applications

• Ultra-premium: Ra 0.4μm for critical biotech and injectable applications

All finishes are achieved through electropolishing to ensure consistent surface quality.

What pressure ratings can be expected?

Pressure ratings vary by diameter:

• DN10-DN50: 1.6MPa (232 psi) at 100°C

• DN65-DN100: 1.0MPa (145 psi) at 100°C

• DN125-DN200: 0.6MPa (87 psi) at 100°C

• DN250: 0.4MPa (58 psi) at 100°C

All ratings comply with ASME B31.3 process piping code.

What fitting options are compatible?

Compatible sanitary fittings include:

• Tri-clamp unions (3A, SMS, DIN standards)

• Orbital-welded fittings

• Sanitary ball valves and check valves

• Diaphragm valves for pharmaceutical applications

• Sight glasses and flow meters

All fittings maintain the same surface finish and hygienic standards as the pipework.

What documentation is provided with the pipework?

Each shipment includes:

• Material certification (3.1.B test report per EN 10204)

• Surface finish verification report with Ra measurements

• Heat treatment records

• Weld certification for welded pipes

• Compliance documentation for ASME BPE and EU 2025/351