Dielectric Flanges
Series E300 dielectric flange sets — a steel flange paired with a bronze companion flange, insulated bolting and an EPDM gasket. Installed between pipes of dissimilar metals, they stop the galvanic and stray-current corrosion that would otherwise eat the joint.
Technical Data
| Dielectric Flanges — specification | |
|---|---|
| Size range | 2 1/2"–6" (DN65–DN150) |
| Rating | EN 1092-1 PN16 or ASME B16.5 Class 150 — specify at order |
| Working pressure | 16 bar (PN16) / 19.6 bar (Class 150) at ambient |
| Test pressure | 25 bar (363 psi) |
| Max temperature | 120 °C (248 °F) |
| Ends | Female NPT / BSPT / solder |
| Gasket | Nylon-reinforced EPDM, 3.18 mm |
Drawing & Dimensions
Model E305 dielectric flange set, 3″ (DN80) PN25 shown — bronze flange, A105 companion flange, insulating gasket, bolt insulators.
Click the drawing to enlarge
Dimensions in millimeters per BS EN 1092-1; other sizes on request.
Click the drawing to enlargeDatasheet & Documents
The official Dielectric Flanges datasheet — specification, materials, standards and the complete dimension tables.
ISO 9001:2015 certified quality
How to Order
Also in This Range
Questions & Answers
What is a dielectric flange?
A dielectric flange set electrically isolates two sections of pipe at a flanged joint using an insulating gasket, bolt sleeves and washers. Breaking the electrical path stops galvanic current flowing between dissimilar metals, which is a common cause of corrosion where, for example, bronze meets carbon steel.
What is the difference between a dielectric flange and a dielectric union?
They do the same job at different sizes and connection types. A dielectric union is a small-bore threaded fitting, typically 1/2" to 2", with the insulator built into the union. A dielectric flange is a flanged assembly for larger lines, where the insulation is provided by a gasket, sleeves and washers between two standard flanges.
What size range do you supply for dielectric flanges?
2 1/2"–6" (DN65–DN150). Other sizes can usually be supplied on request — send your requirement for confirmation.
Is a technical datasheet available?
Yes — the official YTM Pipe datasheet with dimensions, materials and standards can be downloaded on this page.
How do I get a price?
Send size, specification and quantity through the Request-a-Quote form, WhatsApp or [email protected] — our team responds within one business day.
Dielectric Flanges. Specified. Checked. Delivered.
Manufactured and supplied to the governing standard, inspected and documented before dispatch.