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SO Flange
SDFL
This EN 1092-1 SO flange (Slip-On) crafted from F304 stainless steel is engineered for reliability in low-pressure industrial pipelines. With a DN25 (1") nominal size and PN10 pressure rating (1.0 MPa), it offers a cost-effective solution for systems requiring easy installation and moderate corrosion resistance. Its slip-on design simplifies alignment during assembly, making it a preferred choice for small-bore pipelines in European and global markets adhering to EN standards.
Parameter | Details |
Standard | EN 1092-1 Type 11 (Slip-On flange) with compliance to CE marking requirements |
Material | Stainless steel 1.4301 (F304) with 18% chromium and 8% nickel content for corrosion resistance |
Seal Type | Raised Face (RF) with 1.6mm raised sealing surface, compatible with EN 1514-2 gaskets |
Dimensions | OD: 115mm, Bolt Circle: 85mm, Thickness: 14mm, 4x M10 bolt holes (pitch circle diameter 85mm) |
Slip-On Design: Allows easy alignment with pipe outer diameter (28.2mm for DN25) and requires only single-sided fillet welding on both inner and outer edges, reducing installation time by 40% compared to weld-neck flanges.
European Compliance: Fully meets EN 1092-1 PN10 standards for dimensional accuracy and pressure performance, ensuring seamless integration with EU-manufactured pipes, valves, and fittings.
Corrosion Resistance: F304 stainless steel forms a protective oxide layer that withstands mild acids (pH 4–8), alkaline solutions, and atmospheric corrosion, making it suitable for indoor and outdoor installations.
Cost-Effective: Ideal for non-critical applications such as compressed air lines (up to 0.8 MPa), potable water distribution, and low-pressure chemical dosing systems, balancing performance with affordability.
HVAC Systems: PN10 flanges connect chilled water circulation pipes in commercial buildings, maintaining stable pressure (≤1.0 MPa) in air conditioning and heating networks.
General Industry: DN25 connections facilitate small-scale chemical dosing systems in wastewater treatment plants, where precise flow control and corrosion resistance are essential.
Q: Can this flange be used with metric pipes?
A: Yes. The slip-on design is specifically engineered to accommodate ISO 336 DN25 pipes (outer diameter 28.2mm), with a 1.5mm clearance for easy fitting before welding.
Q: What torque should be applied to the bolts?
A: Use M10 stainless steel bolts torqued to 35–40 N·m for PN10 applications; follow a cross-tightening sequence to ensure uniform gasket compression.
Q: Is surface treatment available for harsh environments?
A: Optional passivation treatment (per ASTM A967) enhances corrosion resistance by removing free iron from the surface, recommended for outdoor or high-humidity installations.
This EN 1092-1 SO flange (Slip-On) crafted from F304 stainless steel is engineered for reliability in low-pressure industrial pipelines. With a DN25 (1") nominal size and PN10 pressure rating (1.0 MPa), it offers a cost-effective solution for systems requiring easy installation and moderate corrosion resistance. Its slip-on design simplifies alignment during assembly, making it a preferred choice for small-bore pipelines in European and global markets adhering to EN standards.
Parameter | Details |
Standard | EN 1092-1 Type 11 (Slip-On flange) with compliance to CE marking requirements |
Material | Stainless steel 1.4301 (F304) with 18% chromium and 8% nickel content for corrosion resistance |
Seal Type | Raised Face (RF) with 1.6mm raised sealing surface, compatible with EN 1514-2 gaskets |
Dimensions | OD: 115mm, Bolt Circle: 85mm, Thickness: 14mm, 4x M10 bolt holes (pitch circle diameter 85mm) |
Slip-On Design: Allows easy alignment with pipe outer diameter (28.2mm for DN25) and requires only single-sided fillet welding on both inner and outer edges, reducing installation time by 40% compared to weld-neck flanges.
European Compliance: Fully meets EN 1092-1 PN10 standards for dimensional accuracy and pressure performance, ensuring seamless integration with EU-manufactured pipes, valves, and fittings.
Corrosion Resistance: F304 stainless steel forms a protective oxide layer that withstands mild acids (pH 4–8), alkaline solutions, and atmospheric corrosion, making it suitable for indoor and outdoor installations.
Cost-Effective: Ideal for non-critical applications such as compressed air lines (up to 0.8 MPa), potable water distribution, and low-pressure chemical dosing systems, balancing performance with affordability.
HVAC Systems: PN10 flanges connect chilled water circulation pipes in commercial buildings, maintaining stable pressure (≤1.0 MPa) in air conditioning and heating networks.
General Industry: DN25 connections facilitate small-scale chemical dosing systems in wastewater treatment plants, where precise flow control and corrosion resistance are essential.
Q: Can this flange be used with metric pipes?
A: Yes. The slip-on design is specifically engineered to accommodate ISO 336 DN25 pipes (outer diameter 28.2mm), with a 1.5mm clearance for easy fitting before welding.
Q: What torque should be applied to the bolts?
A: Use M10 stainless steel bolts torqued to 35–40 N·m for PN10 applications; follow a cross-tightening sequence to ensure uniform gasket compression.
Q: Is surface treatment available for harsh environments?
A: Optional passivation treatment (per ASTM A967) enhances corrosion resistance by removing free iron from the surface, recommended for outdoor or high-humidity installations.
