Double Press Fittings Series
Double Press Fittings are designed for fast, flame-free joining in water and building-service piping. A double-press profile supports secure assembly across common elbows, tees, couplings, reducers, adapters and caps. Final size, pressure, seal and approval selections depend on the pipe system and project requirements.
Key Features
- Double-press connection profile
- Flame-free installation
- Stainless steel construction options
- Elbows, tees, couplings, reducers, adapters and caps
- Visible connection status during pressure testing
- Project-specific size and seal configuration
TECHNICAL SPECIFICATIONS
Material Options
Stainless steel options
Connection Types
Double press
Temperature Range
Application-dependent; confirm seal and service medium
Pressure Rating
Application-dependent; confirm size and system configuration
Diameter Range
Typical press-system range: 15–108 mm; confirm final fitting size
Certifications
Project and market approvals vary by application
Pipe Compatibility Reference: Industrial Stainless Steel Welded Pipes
| Nominal Diameter (DN) | NPS Designator | OD - ASTM/ASME (mm) | OD - EN/ISO (mm) | OD - JIS (mm) | WT - Sch 10S (mm) | WT - Sch 40S (mm) | Remarks |
|---|---|---|---|---|---|---|---|
| DN15 | 1/2" | 21.3 mm | 21.3 mm | 21.7 mm | 2.11 mm | 2.77 mm | Standard |
| DN20 | 3/4" | 26.7 mm | 26.9 mm | 27.2 mm | 2.11 mm | 2.87 mm | - |
| DN25 | 1" | 33.4 mm | 33.7 mm | 34.0 mm | 2.77 mm | 3.38 mm | - |
| DN32 | 1-1/4" | 42.2 mm | 42.4 mm | 42.7 mm | 2.77 mm | 3.56 mm | - |
| DN40 | 1-1/2" | 48.3 mm | 48.3 mm | 48.6 mm | 2.77 mm | 3.68 mm | - |
| DN50 | 2" | 60.3 mm | 60.3 mm | 60.5 mm | 2.77 mm | 3.91 mm | Most Popular |
| DN65 | 2-1/2" | 73.0 mm | 76.1 mm | 76.3 mm | 3.05 mm | 5.16 mm | Verify OD |
| DN80 | 3" | 88.9 mm | 88.9 mm | 89.1 mm | 3.05 mm | 5.49 mm | - |
| DN100 | 4" | 114.3 mm | 114.3 mm | 114.3 mm | 3.05 mm | 6.02 mm | Universal OD |
| DN125 | 5" | 141.3 mm | 139.7 mm | 139.8 mm | 3.4 mm | 6.55 mm | - |
| DN150 | 6" | 168.3 mm | 168.3 mm | 165.2 mm | 3.4 mm | 7.11 mm | JIS Spec |
| DN200 | 8" | 219.1 mm | 219.1 mm | 216.3 mm | 3.76 mm | 8.18 mm | - |
| DN250 | 10" | 273.1 mm | 273.0 mm | 267.4 mm | 4.19 mm | 9.27 mm | - |
| DN300 | 12" | 323.9 mm | 323.9 mm | 318.5 mm | 4.57 mm | 9.53 mm | - |
Industrial pipe dimensions follow ASME B36.19M and EN ISO 1127 Series 1 references. These values are for industrial welded pipes, not thin-wall press-connect tubes. Confirm the applicable outside diameter before ordering, especially for DN65, where ASTM, EN/ISO and JIS values differ.
Pipe Compatibility Tolerances: Stainless Steel Welded Pipes
| Nominal Diameter (DN) | NPS Designator | Outside Diameter (OD) Tolerance | Wall Thickness (WT) Tolerance |
|---|---|---|---|
| DN15–DN40 | 1/2" to 1-1/2" | +0.40 / -0.80 mm | +20.0% / -12.5% |
| DN50–DN65 | 2" to 2-1/2" | +0.80 / -0.80 mm | +20.0% / -12.5% |
| DN80–DN100 | 3" to 4" | +0.80 / -0.80 mm | +22.5% / -12.5% * |
| DN125–DN200 | 5" to 8" | +1.60 / -0.80 mm | +15.0% / -12.5% * |
| DN250–DN300 | 10" to 12" | +2.40 / -0.80 mm | +15.0% / -12.5% * |
Tolerance reference: ASTM A999-23 and A312. For press-connect or thin-wall systems, request the dedicated tube dimensional catalog. Large-diameter tolerance depends on the t/D ratio; final dimensions are confirmed against the selected standard and order.
- Potable and utility water systems
- Commercial and residential building services
- Industrial water and treated-water systems
- Projects requiring flame-free installation
Application approvals
Confirm applicable local standards and system approvals for the selected size, seal and service medium.
Technical verification
Final pressure, temperature and seal selection should be verified against project requirements.
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