Sanitary Unions

Sanitary Union Fittings Supplier in China

  • 15 + Years Manufacturer, based in China
  • Trusted by global OEMs & valve wholesalers
  • Custom Hygienic Union Fittings
  • Fast delivery · Low MOQ · ISO 9001 Certified
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Sanitary union fittings supplier in China

Leading Supplier of Sanitary Union Fittings in China

Sanitary unions are hygienic fittings used to connect tubing, valves, pumps, tanks, and processing equipment in systems where cleanliness, safety, and easy maintenance are essential.

They provide a secure, leak-resistant, easily detachable connection and support CIP and SIP cleaning processes without compromising product integrity.

Beyond Fluid supplies stainless steel sanitary unions engineered for durability, consistent dimensions, smooth surface finish, and compatibility with ISO/IDF, RJT, SMS, 3A, DIN, and other international sanitary standards.

15+ Years manufacturing experience
OEM Custom drawings supported
SS304/316L Food-grade stainless steel
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Specifications

Common options for distributors, wholesalers, OEM buyers, and project orders.

  • Size 1/2 inch to 4 inch / DN10 to DN100
  • Material SS316L / 1.4404, SS304 / 1.4301
  • Standard DIN, SMS, 3A, RJT, IDF, ISO, MARCON
  • Seal Gasket Silicone, EPDM, NBR
  • Surface Finish Inside Ra ≤ 0.8 μm, outside Ra ≤ 1.6 μm
  • Temperature -10°C to 150°C for EPDM, -20°C to 120°C for silicone
  • Pressure 150 psi / 10 bar to 300 psi / 20 bar
  • Product Type Nut, male, liner, expanding male, blind nut

Sanitary Union Product Range

3A Sanitary Unions
3A Sanitary Unions

  • Size: 1" – 4" / DN10 – DN100
  • Material: SS316L / 1.4404
  • Standard: 3A Sanitary Standard

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DIN Sanitary Unions
DIN Sanitary Unions

  • Size: 1" – 4" / DN10 – DN100
  • Material: SS316L / 1.4404
  • Standard: DIN Sanitary Standard

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SMS Sanitary Unions

  • Size: DN25 – DN100
  • Material: SS316L / 1.4404
  • Standard: SMS Sanitary Standard

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ISO/IDF Sanitary Unions
ISO/IDF Sanitary Unions

  • Size: 1" – 4" / DN25 – DN100
  • Material: SS316L / 1.4404
  • Standard: ISO / IDF Standard

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MARCON Sanitary Unions

  • Size: 1" – 4"
  • Material: SS316L / 1.4404
  • Standard: MARCON Standard

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RJT Sanitary Unions

  • Size: 1" – 6" / DN25 – DN100
  • Material: SS316L / 1.4404
  • Standard: RJT Sanitary Standard

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Sanitary union pipe fitting structure with nut, weld liner, seal ring and weld male
4-piece sanitary union Nut · Weld liner · Seal ring · Weld male

Sanitary union structure

Sanitary Union Pipe Fittings

Sanitary unions connect tubing or equipment while allowing fast disassembly for cleaning, inspection, and maintenance in hygienic processing systems.

  • 01
    Nut
    Tightens the assembly and keeps all parts locked in position.
  • 02
    Weld Liner
    Inner ferrule welded to one pipe end for smooth product flow.
  • 03
    Seal Ring
    Creates a tight, leak-resistant sanitary seal between both ends.
  • 04
    Weld Male
    Outer ferrule that compresses the seal when the nut is tightened.
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Key advantages

Features of Hygienic Unions

Beyond Fluid hygienic unions are built for cleanability, reliable sealing, fast maintenance, and long service life in sanitary processing systems.

Hygienic Design Smooth surfaces help reduce product buildup and support easy cleaning.
Quick Assembly Nut, male end, liner, and gasket structure enables fast disassembly.
Leak-resistant Seal Selected gasket materials help maintain a tight sanitary connection.
Durable Stainless Steel SS304 and SS316L options support corrosion resistance and long service life.
Global Standards Available in DIN, SMS, 3A, RJT, IDF, ISO, and MARCON standards.
B2B Supply Support Suitable for wholesalers, distributors, OEM buyers, and project orders.
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Stainless steel hygienic union fittings with nut liner and gasket
SS304 / SS316L DIN · SMS · 3A · RJT · IDF

Application industries

Applications of Sanitary Unions

Sanitary unions are used in hygienic piping systems where quick disassembly, cleanability, corrosion resistance, and reliable sealing are required.

Sanitary union fittings used in hygienic stainless steel piping systems
For hygienic processing lines Used around pumps, tanks, valves, transfer lines, CIP loops, and equipment connections.
01
Food & Beverage

Dairy, juice, soft drinks, brewing, wine, bottled water, and food transfer systems.

02
Pharmaceutical & Biotech

Sterile fluid transfer, cleanroom piping, CIP/SIP processes, and clean utility lines.

03
Dairy Processing

Milk collection, pasteurization lines, hygienic transport, and tank connections.

04
Cosmetics & Personal Care

Creams, gels, lotions, and personal-care products under hygienic production conditions.

05
Sanitary Chemical Processing

Corrosion-resistant fluid handling where stainless steel hygienic connections are required.

06
Brewing Industry

Fermentation tanks, transfer lines, kegging systems, CIP circuits, and brewery equipment.

Need sanitary unions for your industry?

Send your application, standard, size list, material, gasket type, and quantity. We will recommend suitable sanitary union fittings for your piping system.

Request Application Support

Bulk supply and OEM service

Bulk Supply & OEM Customization for Sanitary Unions

Beyond Fluid supports distributors, wholesalers, equipment builders, and project buyers with stable bulk supply, custom drawings, private-label packaging, and repeat-order production.

What We Can Customize

For buyers who need sanitary unions matched to local markets, equipment standards, or private brands.

  • 01
    Custom Dimensions Manufacture according to drawings, samples, or special tube connection requirements.
  • 02
    Material Options SS304 / 1.4301 and SS316L / 1.4404 for different corrosion and hygiene requirements.
  • 03
    Surface Finish Polished hygienic finish with internal Ra ≤ 0.8 μm available for sanitary applications.
  • 04
    Marking & Packaging Support laser marking, neutral packaging, private-label cartons, and barcode labels.
  • 05
    Union Components Supply complete sets or separate nuts, weld males, liners, blind nuts, and gaskets.

Built for B2B Orders

Bulk Recurring distributor orders
OEM Drawing-based production
QC Dimension and finish checks
Export Global B2B shipment support

What to Send for OEM Quote

Send standard, size list, material, gasket type, quantity, drawings or samples, packaging requirements, destination country, and target delivery date.

Request OEM Quote

Quality control

Quality Control for Sanitary Union Fittings

Beyond Fluid controls sanitary union quality from raw material to final packing, helping distributors and OEM buyers receive consistent dimensions, clean surface finish, and reliable assembly performance.

Inspection Process

01
Material Verification Check stainless steel grade, material certificate, and batch traceability before machining.
02
CNC Machining Control Control critical dimensions, thread accuracy, sealing face, and connection compatibility.
03
Surface Finish Check Inspect polishing quality and internal surface roughness for hygienic applications.
04
Assembly & Gasket Fit Verify nut, male, liner, and gasket fit before packing complete union sets.
05
Final Packing Inspection Check marking, quantity, carton labels, and export packaging before shipment.

What We Check

Dimensions Size, tube OD, thread, ferrule profile, and mating surfaces.
Thread Quality Smooth tightening, no burrs, and stable nut assembly.
Surface Roughness Internal Ra ≤ 0.8 μm available for sanitary flow paths.
Gasket Compatibility EPDM, silicone, NBR, and other gasket options checked for fit.
Visual Finish Clean polishing, no visible cracks, sharp burrs, or heavy scratches.
Packaging Separate protection, carton labeling, and export-ready packing.

Need inspection documents for your order?

Tell us your required material certificate, drawing, surface finish, packing, or inspection standard before placing the order.

Send Quality Requirements

Who we are

Beyond Fluid

Reliable Sanitary Fittings Manufacturer for Wholesale Buyers

Beyond Fluid supplies stainless steel sanitary fittings, valves, and hygienic connection components for wholesalers, distributors, equipment manufacturers, and project contractors.

We focus on stable quality, consistent dimensions, responsive service, and repeat-order supply for global sanitary processing markets.

  • Sanitary union fittings in DIN, SMS, 3A, RJT, IDF, ISO, and MARCON standards
  • SS304 and SS316L stainless steel options for food-grade and hygienic systems
  • OEM production from drawings, samples, or private-label packaging requirements
  • Bulk supply support for distributors, wholesalers, and equipment builders
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CNC machining for stainless steel sanitary fittings production
15+ Years of Experience
OEM Drawing-based production
QC Dimensional inspection
Bulk Distributor supply
Export Global shipment support

FAQ

Frequently Asked Questions.

Here are a few real most popluar questions from our clients.

We manufacture hygienic fittings primarily from high-quality 304 and 316L stainless steel. These grades provide excellent corrosion resistance, durability, and compliance with sanitary standards for international markets.
Yes, we specialize in OEM services and can produce fittings according to your custom drawings, sizes, or branding requirements. This makes us a reliable partner for long-term business relationships.
Yes, our sanitary unions comply with international sanitary standards such as DIN, SMS, 3A, RJT, IDF, ISO, MARCON. This ensures compatibility with equipment and systems used worldwide.

Sure, we can provide samples of instrument ball valves or fittings for evaluation firstly.    Besides, we have the capability to manufacture according to specific requirements.

Our typical payment term is 30% T/T in advance, balance payment against BL copy. But for serious buyers/companies, we’re open to discussing more flexible payment terms.

Our main clients are B2B buyers such as valve and fittings wholesalers, distributors, OEM manufacturers, large contractors, and project engineering companies worldwide.

Ordering guide

Ordering Information for Sanitary Union Fittings

To receive an accurate quotation, please send the standard, size, material, gasket type, quantity, and any drawing or packaging requirements for your sanitary unions.

What to Include in Your RFQ

Clear inquiry details help us quote faster and avoid wrong-standard fittings.

  • 01
    Standard DIN, SMS, 3A, RJT, IDF, ISO, MARCON, or custom drawing.
  • 02
    Size List Tube size, DN size, inch size, or full dimension table if available.
  • 03
    Material SS304 / 1.4301 or SS316L / 1.4404 stainless steel.
  • 04
    Gasket EPDM, silicone, NBR, or other gasket material required by your process.
  • 05
    Quantity Required order quantity, annual demand, or sample quantity for testing.
  • 06
    Special Requirements Surface finish, marking, private label, packing, inspection, or delivery date.

Supply Information

Samples Available for standard sizes or evaluation before bulk order.
MOQ Depends on size, standard, material, and customization requirement.
Lead Time Confirmed after size list, quantity, and production schedule review.
Packaging Neutral export packing, custom labels, cartons, or private-label options.
Documents Material certificate, drawing, inspection record, or packing list on request.
Shipping Support for courier, air, sea, or forwarder-based international shipment.

Ready to request a quote?

Send your size list and target standard. Our team will confirm compatibility, price, lead time, and packing details.

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We will contact you within 1 working day.

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