Line Routing
Routing product-contact lines across hygienic process areas.
Sanitary Fittings
Industrial Threaded & Socket-Weld Unions
Forged stainless steel unions for industrial pipe disconnect points. Threaded (NPT/BSP) and socket-weld configurations per ASME B16.11.
304 / 316LElbowsTeesTri-Clamp / Weld
Applications
Routing components for sanitary process systems.
Elbows and tees are normally sourced by size, connection type, material and quantity from drawings or BOMs.
Branch Connections
Tee and elbow packages for transfer and CIP layouts.
Project BOMs
Fitting packages supplied from project lists and drawings.
Sizes & Dimensions
Industrial union dimensions.
Three-piece unions allow disconnect without disturbing adjacent piping. Available in NPT threaded (most common), BSP threaded, or socket-weld ends.
| Size | Connection | Class | Length (mm) | Material | Sealing |
|---|---|---|---|---|---|
| ¼" | NPT (F/F) | 3000 | 38 | 316L | Metal-to-metal |
| ½" | NPT (F/F) | 3000 | 44 | 316L | Metal-to-metal |
| ¾" | NPT (F/F) | 3000 | 51 | 316L | Metal-to-metal |
| 1" | NPT (F/F) | 3000 | 57 | 316L | Metal-to-metal |
| 1½" | NPT (F/F) | 3000 | 64 | 316L | Metal-to-metal |
| 2" | NPT (F/F) | 3000 | 70 | 316L | Metal-to-metal |
| ½" | Socket-Weld | 3000 | 44 | 316L | Metal-to-metal |
| 1" | Socket-Weld | 3000 | 57 | 316L | Metal-to-metal |
Operating Conditions
Pressure-temperature rating for industrial unions.
Class 3000 unions rated to ~165 bar at ambient temperature. Class 6000 available for higher pressure.
Service Conditions
- Threaded working: ~100 bar at ambient
- Socket-weld working: ~165 bar at ambient
- Class 150: Standard rating
- Class 3000: Heavy duty
- Temperature: –196°C to +538°C
- Test pressure: 1.5× working
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.
ASME B16.11
Forged Fittings
Forged fittings, socket-welding and threaded.
ASTM A276
Stainless Steel Bar
Material specification for 304/316L bodies.
ASME B1.20.1
NPT Threads
American National Standard Pipe Thread.
ISO 228
BSP Threads
British Standard Pipe (parallel) threads.
ASME B31.3
Process Piping
Process piping design code.
PED 2014/68
Pressure Equipment
European Pressure Equipment Directive compliance.
NACE MR0175
Sour Service
Materials for sour gas service applications.
EN 10204 3.1
Material Certificate
Material test certificate with traceability.
Product Variants
Industrial Union configurations for different process roles.
Multiple variants available to match your application requirements. Browse related products for complete process line coverage.
NPT Threaded Unions
Female NPT threads on both ends. Most common for instrumentation and utility lines.
Request quote →BSP Threaded Unions
British Standard Pipe (parallel) threads for European installations.
Request quote →Socket-Weld Unions
Socket-weld ends for permanent weld with disconnect point capability.
Request quote →Technical Overview
Typical elbow and tee RFQ fields.
Dimensional confirmation should follow supplier drawings and project specifications.
| Requirement | Typical Information Needed |
|---|---|
| Product Type | 90° elbow, 45° elbow, equal tee, reducing tee by RFQ |
| Material Grade | 304 / 316L stainless steel |
| Connection | Tri-clamp, weld end or mixed connection by RFQ |
| Size | Nominal sanitary tube size / OD |
| Documentation | MTR / finish notes / drawings by RFQ |
Engineering RFQ
Prepare an elbows & tees RFQ.
Include fitting type, size, connection, material, quantity and drawing/BOM references.
- 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 elbows or tees requirement?
Send fitting list, sizes, connection types, 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 industrial unions.
Engineering and procurement questions we hear most often. For project-specific guidance, send your application details via RFQ.
What is the difference between buttweld and socket-weld?
Buttweld: pipe ends butted together and welded around the joint — preferred for ≥2" pipe and high-pressure service. Socket-weld: pipe inserted into socket and welded around outside — easier for small bore (≤2") but creates a crevice.
For sanitary or high-purity service, neither is ideal — use orbital-welded sanitary fittings instead. Industrial socket-weld is fine for utility and low-criticality service.
When should I use 304 vs 316L?
304: general-purpose stainless for water, steam, mild chemicals, structural. 316L: 2-3% molybdenum for chloride resistance, marine, aggressive chemicals.
For coastal, brackish water, or chemical service, specify 316L. For dry indoor utility, 304 is more economical. For sour gas (H2S), specify NACE-compliant material.
What schedule fittings should I match to my pipe?
Fittings must match pipe schedule. Sch 10S pipe → Sch 10S fittings. Same OD, same wall thickness, same pressure rating.
Sch 40S is most common for general industrial. Sch 80S for high-pressure or aggressive service. Always confirm pipe schedule before ordering fittings.
Are these NACE-compliant for sour service?
NACE MR0175 compliance available on request. Specifies hardness limits, chemistry restrictions and welding requirements for H2S service.
Required for oil & gas applications with sour gas. Documentation includes NACE compliance certificate with mill test report.
What documentation is provided?
Standard: EN 10204 3.1 material test report with heat number traceability. Optional: dimensional inspection report, NACE compliance, charpy impact test.
For critical service (pressure vessels, sour gas, low-temperature), specify additional inspection. PED 2014/68 certification available for European projects.
What lead time should I expect?
Standard sizes (½" to 4") in stock or short lead time. Larger sizes (6"+) or special schedules: 4-8 weeks. Custom alloys or NACE: 6-12 weeks.
For project quantities, contact for scheduled delivery. Most common sizes maintained in inventory for fast shipment.
Can these be supplied with PED certification?
Yes — Pressure Equipment Directive (PED 2014/68/EU) compliance for pressure-containing fittings available. Required for European pressure systems.
Includes notified body assessment, material traceability, and CE marking. Specify with RFQ — affects material sourcing and certification process.