High-Strength Universal Flange Adaptor
1.This versatile mechanical coupling directly connects plain-ended pipes to flanged valves, pumps, flow meters and fittings, eliminating welding, threading and special tooling entirely.
2.Multi-material compatibility: compatible with ductile iron, PVC, steel, PE/HDPE and GRP as well as asbestos cement pipes — a single adaptor suits all piping systems.
3.Fast installation using only standard wrenches for bolt-and-nut assembly; no hot work permits, welding teams or specialized equipment are needed.
4.Fusion-bonded epoxy (FBE) coating (minimum thickness 250 μm) delivers superior corrosion resistance for buried and submerged applications, with a design service life exceeding 50 years.
5.Built-in EPDM or NBR rubber gaskets form a full 360° circumferential seal. EPDM gaskets comply with NSF/ANSI 61 standards for potable water pipelines.
6.Built-in tolerance absorption accommodates pipe misalignment, angular deflection of ±5°, and thermal expansion and contraction of pipelines.
7.Sizes range from DN50 to DN2000 (2″–80″), with pressure ratings PN10–PN40 / Class 150–300; housings are available in ductile iron or cast steel.
8.Perfect for emergency pipeline repairs, system retrofits and new installations where traditional flanged connections cannot be implemented.
High-Strength Universal Flange Adaptor
DEVEL Universal Flange Adaptor is a versatile mechanical coupling designed to bridge plain-ended pipes directly to flanged valves, pumps, meters, and fittings without welding or threading.
The adaptor features a robust ductile iron or carbon steel body with an integrated high-performance EPDM or NBR rubber gasket ring that creates a reliable 360° circumferential seal under compression from heavy-duty galvanized or stainless steel bolt fasteners.
Its unique tolerance-absorbing design effectively compensates for pipe misalignment, angular deflection, axial movement, and thermal expansion or contraction in the pipeline — making it an essential component for rapid pipeline repair, system modification, and new installation projects where conventional flanged connections are impractical.
The entire assembly is protected by a fusion-bonded epoxy (FBE) coating with a minimum thickness of 250 microns, ensuring long-term durability in underground and submerged service environments.
Key Features at a Glance
- Flexible Connection Design
Engineered to connect plain-ended pipes to flanged equipment while accommodating axial movement, angular deflection, and lateral offset. This flexibility eliminates stress concentrations at connection points and protects sensitive downstream equipment such as pumps, flow meters, and control valves from damaging pipe loads. - Universal Multi-Material Compatibility
A single adaptor design works seamlessly across multiple pipe materials including Ductile Iron (DI), PVC, Steel, PE/HDPE, GRP, and Asbestos Cement. No material-specific adapters are required — one product family covers the full spectrum of municipal and industrial piping systems. - Rapid Bolt-and-Nut Installation
Simple field assembly requires only standard wrench tools — no welding, threading, grooving, or special tooling needed. Installation time is reduced by up to 70% compared to traditional flanged spool fabrication, significantly lowering labor costs on large-scale projects. - Fusion-Bonded Epoxy (FBE) Corrosion Protection
The complete outer surface is coated with a high-quality fusion-bonded epoxy resin layer with a minimum thickness of 250 microns. This FBE coating provides exceptional resistance to soil corrosion, groundwater chemicals, and cathodic disbondment — delivering a service life exceeding 50 years in buried pipeline applications. - Integrated Rubber Gasket Sealing System
A precision-molded EPDM or NBR rubber gasket ring is factory-installed within the adaptor body, creating a 360° circumferential seal around the plain pipe end when bolted down. EPDM formulation is certified for potable water applications (NSF/ANSI 61 compliant), while NBR grade offers superior resistance to oil, fuel, and hydrocarbon media. - Tolerance Absorption & Misalignment Compensation
Effectively compensates for common field installation tolerances including pipe out-of-roundness, slight axial misalignment up to ±5°, longitudinal expansion or contraction from thermal cycling, and minor diameter variations between different pipe manufacturing standards. - Heavy-Duty Bolt Fastening System
Equipped with galvanized carbon steel or optional A4 stainless steel bolts, nuts, and lock washers sized and spaced to deliver uniform clamping force around the entire circumference. Bolt sizes range from M12×130mm (DN50–DN300) to M16×180mm (DN350–DN600+), with quantities scaled to ensure leak-free performance at rated pressure. - Broad Pressure & Size Range
Available from DN50 (2″) up to DN2000 (80″) with pressure ratings spanning PN10 through PN40 / Class 150 to Class 300. Body material options include Ductile Iron GGG40/50 for standard duty, Cast Steel for higher pressures, and Carbon Steel for specialized industrial applications requiring enhanced mechanical strength.
Key Technical Advantages
1. All-in-One Conversion Solution: Eliminates the need for separate weld-neck stub ends, backing rings, transition spools, or custom fabrication. The flange adaptor directly converts any plain-end pipe into a fully flanged connection point in a single component — reducing inventory SKUs, simplifying procurement logistics, and cutting total installed cost by an estimated 30–45% compared to conventional multi-piece assemblies.
2. Emergency Repair Capability: The ideal choice for rapid pipeline repair and emergency break-fix scenarios where excavation time windows are limited. A damaged flange, corroded joint, or broken valve can be replaced in hours rather than days — simply cut the pipe square, slide on the adaptor, tighten the bolts, and restore full pressure service without hot-work permits or specialized welding crews on standby.
3. Certified Material Compliance: Manufactured in full compliance with ISO 2531 (Ductile Iron pipes/fittings), EN 545 (Water Applications), EN 1092 (Flanges/ Joints), and ANSI/AWWA C153/AWWA C110 standards. Body materials meet GGG40/GGG50 tensile strength requirements (minimum 420 MPa / 500 MPa respectively). Optional third-party testing and material traceability documentation available for regulated utility projects.
4. Submerged & Buried Service Qualified: The combination of FBE external coating, corrosion-resistant fastener options, and elastomer gasket compatibility makes this adaptor fully suitable for direct-burial installation, underwater/submarine pipelines, and corrosive soil conditions without additional cathodic protection accessories on the coupling body itself.
Technical Parameters
Dimensions & Size Specifications
Note: Above sizes are manufactured according to Chinese Standard specifications. Additional sizes beyond DN600 and non-standard configurations can be customized according to your project requirements. Contact our engineering team for custom dimension drawings.
Installation Guidelines & Best Practices
1. Pipe End Preparation: Ensure the plain pipe end is cut squarely (perpendicular to pipe axis) with no sharp burrs, longitudinal scoring, or excessive out-of-roundness beyond the adaptor’s stated O.D. tolerance range. Light deburring with a hand file or grinder is recommended. For PE/PVC pipes, remove any factory bevel so the pipe end presents a flat face to the gasket.
2. Insertion Depth & Centering: Slide the pipe fully into the adaptor body until it bottoms against the internal shoulder or reaches the marked insertion depth line (typically 60–80% of the total body length). Verify concentric alignment before beginning bolt tightening. For larger diameters (≥DN300), use a pipe jack or alignment tool to maintain center position during assembly.
3. Bolt Tightening Sequence: Tighten bolts progressively in a star-pattern (cross-opposite) sequence using a calibrated torque wrench. Do not fully tighten one side before the others — this can cause uneven gasket compression and potential leakage paths. Recommended initial torque: 50% of final spec, then increment to full torque in two additional passes.
4. Post-Installation Pressure Test: After assembly completion, conduct a hydrostatic test at 1.5× working pressure (or per project specification) for a minimum hold period of 30 minutes. Inspect all bolt-gasket interfaces and the pipe-to-gasket contact zone for weeping or seepage. Re-torque if necessary after the first pressurization cycle.
Typical Applications
Wastewater Treatment Plants & Sewage Systems
Agricultural Irrigation Pipeline Systems
Industrial Process Piping (Power Generation)
Chemical Processing Plant Utilities
Fire Fighting & Fire Hydrant Networks
Marine & Offshore Platform Piping
Pipeline Rehabilitation & Replacement Projects
Product Tags
Wide Range Coupling
Ductile Iron Body
EPDM Gasket
NBR Gasket
FBE Coated
Bolted Connection
PN10-PN40
ISO 2531
EN 545
EN 1092
ANSI/AWWA
Multi-Material Pipe
Pipeline Repair
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Factory-direct pricing available. DEVEL engineering team ready to assist with material selection, sizing calculations, and installation guidance.
