Size Transitions
Tube size changes in hygienic process routing.
Sanitary Fittings
Sanitary Reducers for Hygienic Tube Size Transitions.
Reducers support tube size transitions in sanitary process lines and are specified by size, connection, concentric/eccentric style and material.
304 / 316LConcentricEccentricTri-Clamp / Weld
Applications
Sanitary size transition fittings.
Reducers should be specified by both end sizes and connection types to avoid RFQ ambiguity.
Package Assemblies
Reducer packages for skid builders and integrators.
Line Modifications
Replacement and retrofit fitting requirements.
Sizes & Dimensions
Standard reducer dimensions.
Concentric (centered) reducers for vertical lines and gradual flow restriction. Eccentric (flat-on-top) for horizontal lines requiring complete drainage.
| Size | Type | OD Large (mm) | OD Small (mm) | Length (mm) | Style |
|---|---|---|---|---|---|
| 2" × 1" | Conc. | 50.8 | 25.4 | 76 | Standard |
| 2" × 1½" | Conc. | 50.8 | 38.1 | 51 | Standard |
| 3" × 1½" | Conc. | 76.2 | 38.1 | 102 | Standard |
| 3" × 2" | Conc. | 76.2 | 50.8 | 102 | Standard |
| 4" × 2" | Conc. | 101.6 | 50.8 | 152 | Standard |
| 4" × 3" | Conc. | 101.6 | 76.2 | 102 | Standard |
| 2" × 1½" | Ecc. | 50.8 | 38.1 | 51 | Flat-top |
| 3" × 2" | Ecc. | 76.2 | 50.8 | 102 | Flat-top |
Operating Conditions
Pressure-temperature rating for sanitary reducers.
Reducer wall thickness matches the larger tube size. Same pressure rating as standard fittings.
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.
ISO 2037
Sanitary Tubing
ISO standard for sanitary stainless tubing.
ASME BPE
Bioprocessing Equipment
Surface finish, materials and design for pharma/biotech.
DIN 32676
Tri-Clamp Connections
Dimensional standard for tri-clamp fittings.
ASTM A403
Wrought SS Fittings
Wrought austenitic SS pipe fittings spec.
EC 1935/2004
Food Contact
EU regulation on food-contact materials.
FDA 21 CFR
FDA 21 CFR 177
Food contact materials compliance for seats and seals.
Product Variants
Sanitary Reducer configurations for different process roles.
Multiple variants available to match your application requirements. Browse related products for complete process line coverage.
Concentric Reducers
Centered reduction for vertical pipe runs and gradual flow restriction.
Request quote →
Eccentric Reducers
Flat-on-top configuration for horizontal lines requiring complete drainage.
Request quote →
Technical Overview
Typical sanitary reducer RFQ fields.
Specify concentric/eccentric reducer type and connection style clearly.
| Requirement | Typical Information Needed |
|---|---|
| Product Type | Concentric reducer or eccentric reducer |
| Material Grade | 304 / 316L stainless steel |
| Connection | Tri-clamp, weld end or mixed connection by RFQ |
| Size | Large-end size and small-end size |
| Documentation | Material certificates and drawings by RFQ |
Engineering RFQ
Prepare a sanitary reducer RFQ.
Include both end sizes, reducer style, connection types, material and quantity.
- 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 a reducer requirement?
Send reducer type, both end sizes, connection styles, material and quantity.
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 reducers.
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.