Connection Conversion
Adapters for linking valves, fittings, tubing and equipment.
Sanitary Fittings
Sanitary Adapters & Unions for Connection Conversion.
Adapters and unions connect different sanitary or industrial connection types across hygienic process systems and project packages.
304 / 316LAdaptersUnionsConnection Conversion
Applications
Connection conversion for sanitary systems.
Adapters and unions should be specified by both end connections, size and material grade.
Custom Assemblies
Connection conversion support for process skids and assemblies.
Retrofit Requirements
Replacement adapters and unions for existing lines.
Sizes & Dimensions
Standard adapter configurations.
Available with male/female NPT or BSP threads to tri-clamp connections. For instrument connections, valve drains and utility tie-ins.
| Size | Tri-Clamp | Thread Size | Thread Type | Length (mm) | Material |
|---|---|---|---|---|---|
| ½" | 50.5 | ½" | NPT (M/F) | 38 | 316L |
| ¾" | 50.5 | ¾" | NPT (M/F) | 44 | 316L |
| 1" | 50.5 | 1" | NPT (M/F) | 51 | 316L |
| 1½" | 64.0 | 1½" | NPT (M/F) | 64 | 316L |
| 2" | 77.5 | 2" | NPT (M/F) | 76 | 316L |
| ½" | 50.5 | ½" | BSP (M/F) | 38 | 316L |
| 1" | 50.5 | 1" | BSP (M/F) | 51 | 316L |
| 2" | 77.5 | 2" | BSP (M/F) | 76 | 316L |
Operating Conditions
Pressure-temperature rating for sanitary adapters & unions.
Threaded connections rated to 16 bar working. NPT threads per ASME B1.20.1, BSP per ISO 228.
Service Conditions
- Working pressure: 16 bar at ambient
- Test pressure: 24 bar (1.5× working)
- Burst pressure: > 60 bar
- Temperature range: –196°C to +400°C
- Steam SIP: +135°C compatible
- Surface finish: Ra ≤ 0.8 μm (EP option)
Actual ratings depend on size, material and operating conditions. Confirm via RFQ for project-specific requirements.
Standards & Compliance
Built to recognized sanitary and pressure standards.
Full documentation packages available including MTR, 3.1 certificates, surface roughness reports and pressure test records.
3-A 63-04
3-A Sanitary Fittings
Sanitary fittings standard for hygienic process.
ASME B1.20.1
NPT Threads
American National Standard pipe thread.
DIN 32676
Tri-Clamp Connections
Dimensional standard for tri-clamp fittings.
ASME BPE
Bioprocessing Equipment
Surface finish, materials and design for pharma/biotech.
ASTM A276
Stainless Steel Bar
Material specification for 304/316L bodies.
FDA 21 CFR
FDA 21 CFR 177
Food contact materials compliance for seats and seals.
EC 1935/2004
Food Contact
EU regulation on food-contact materials.
Product Variants
Adapter & Union configurations for different process roles.
Multiple variants available to match your application requirements. Browse related products for complete process line coverage.
Tri-Clamp × Sanitary Hose
Tri-clamp to hose barb for flexible sanitary hose connections.
Request quote →Technical Overview
Typical adapter and union RFQ fields.
Clear end connection details reduce sourcing errors and revision cycles.
| Requirement | Typical Information Needed |
|---|---|
| Product Type | Adapter, union or custom connection converter |
| Material Grade | 304 / 316L stainless steel |
| End Connections | Tri-clamp, weld, thread, flange or custom |
| Size | End A and End B size requirements |
| Documentation | Drawing, part reference or BOM by RFQ |
Engineering RFQ
Prepare an adapters & unions RFQ.
Include adapter type, end connections, both sizes, material grade, quantity and drawings where available.
- Size / connection / material grade
- Quantity and target lead time
- Drawing, BOM or existing part reference
- Documentation and finish requirements
Documentation by RFQ
Material certificates, finish notes, inspection requirements, heat traceability and supplier documentation can be included in the quotation package.
Have an adapter or union requirement?
Send end connections, sizes, material, quantity and any drawing or part reference.
Engineering Documentation
Technical Datasheet Available
Download the product datasheet for technical specifications, dimensional references, material data, applicable standards and RFQ guidance. Suitable for procurement, engineering review and project documentation.
Common Questions
Frequently asked questions about sanitary adapters & unions.
Engineering and procurement questions we hear most often. For project-specific guidance, send your application details via RFQ.
What surface finish should I specify?
For general sanitary service, Ra ≤ 0.8 μm (32 μin) mill-polished is standard. For pharmaceutical and biotech applications, electropolished (EP) with Ra ≤ 0.38 μm is required per ASME BPE SF4.
For ultra-high-purity (WFI, vaccine production), specify SF5 (Ra ≤ 0.25 μm mirror finish). Surface roughness reports with profilometer measurements available on request.
What is the difference between 304 and 316L?
316L contains 2-3% molybdenum giving superior corrosion resistance, especially against chlorides. For dairy CIP (containing caustic), 316L is highly recommended.
304 is acceptable for utility, water and air applications. For all product-contact surfaces in food, dairy, pharma and biotech, 316L is the standard.
Can these be supplied with electropolish?
Yes, electropolished (EP) finish is available with Ra ≤ 0.38 μm (SF4) or ≤ 0.25 μm (SF5). Includes passivation per ASTM A967.
EP recommended for pharma/biotech, WFI systems, and aggressive chemical service. Adds ~2-3 weeks lead time. Surface roughness report included.
What documentation is provided?
Standard: EN 10204 3.1 MTR with heat number traceability for all parts.
Optional: surface roughness report, passivation certificate, dimensional inspection, full BPE package for pharmaceutical applications.
What is the typical lead time?
Standard configurations in 304/316L typically ship in 1-2 weeks from stock. Custom finishes or specifications: 3-6 weeks.
For project quantities, scheduled deliveries available. Provide target quantity and dates with RFQ for accurate lead time.
How are these connected to tubing?
Tri-clamp connections use a ferrule on each side with gasket and clamp ring. Weld connections are butt-welded to tubing — orbital welding recommended for hygienic service.
Specify connection type with your RFQ. Weld ends ship with bevels prepared for orbital welding. Mixed configurations (clamp + weld) available.
Are these compatible with CIP/SIP?
Yes — all sanitary fittings are designed for CIP (cleaning) and SIP (sterilization) cycles. Smooth internal surfaces and no dead-legs prevent product buildup.
For SIP at 121-135°C, ensure gasket material is rated for temperature (PTFE or silicone). EPDM is suitable for CIP only.