Industrial Backing Ring Flange Manufacturer – ANSI B16.5/ASME B16.47
Taurus Piping Solution specialises exclusively in the manufacture, supply and export of Backing Ring Flanges, Industrial Backing Ring Flange Manufacturer – ANSI B16.5/ASME B16.47
(also called backup flanges or backing plates) to meet ASME / ANSI dimensional and material requirements. This page
describes the different types of backing ring flanges we produce, their key features, materials, testing and packing
practices — all content is focused only on backing ring flanges for easy reference on backingringflange.com.
On this page
Types of Backing Ring Flanges
Backing ring flanges are small but critical components used with stub ends, lap joints and angle-face fittings to provide
support and allow free rotational alignment. Taurus Piping Solution manufactures the following backing ring flange types:
- Plain Backing Ring (Solid Backing Ring) — a solid ring used where simple support and sealing support is required. Commonly used with stub-ends and lap-joint assemblies.
- Split Backing Ring (Two-piece / Split Ring) — fabricated in two halves for ease of installation around existing pipelines without dismantling. Ideal for retrofit or maintenance jobs where pipe insertion is impractical.
- Loose Backing Flange (Lap Joint Backing Ring) — a loose, freely rotating flange used with lap-joint stub-ends to permit bolt alignment while the stub-end carries the pressure load.
- Gasketed Backing Ring — a backing ring supplied with an integrated or companion gasket seating arrangement for high-integrity sealing where flange face conditions vary.
- Welded / Machine-Welded Backing Ring — backing rings that are fully welded or machine-welded to bespoke shapes or support bosses for special piping assemblies or fittings.
- Galvanized Backing Ring — backing rings supplied with hot-dip or electro-galvanized finishes for enhanced corrosion resistance in external or corrosive environments.
- Split Ring with Locking Feature — split rings supplied with bolted or pins/locking options to prevent axial movement after installation (used in rotating service or where vibration is present).
Key Specifications
| Item | Details |
|---|---|
| Standards | ASME B16.5 / ASME B16.47 dimensions where applicable; custom designs per client drawing |
| Size Range | Typically from ½” NB to 48″ NB (or per client requirement) |
| Pressure Classes | Common classes: ANSI 150, 300, 600, 900, 1500, 2500 (custom pressure ratings on request) |
| Face Types | Flat Face (FF) or Raised Face (RF) interfaces to match mating stub-ends or equipment |
| Production | Forged, machined or cut-from-plate depending on size & design |
| Surface Finish | Oil-black, zinc-plated, hot-dip galvanised, epoxy/FBE, electro-polished (as applicable) |
Materials & Grades
We supply backing ring flanges in a wide range of materials appropriate to pressure, temperature and corrosive service:
| Category | Typical Grades |
|---|---|
| Carbon Steel | ASTM A105, ASTM A350 LF1/LF2 |
| Alloy Steel | ASTM A182 F11, F22, F91 (selected grades) |
| Stainless Steel | SS304 / 304L, SS316 / 316L, 316Ti, 904L |
| Duplex / Super Duplex | UNS S31803 (2205), UNS S32750 / S32760 |
| Nickel Alloys | Monel, Inconel, Incoloy (specific grades on request) |
Manufacturing Process
- Raw material inspection and chemical verification
- Cutting / forging / forming to required blank
- Heat treatment (if required for grade)
- CNC machining for bore, face and bolt-hole accuracy
- Surface finishing and coating per specification
- Marking with heat number, material grade and traceability information
Inspection & Testing
All backing ring flanges are subject to documented quality checks and non-destructive tests as requested:
- Visual and dimensional inspection to ensure fit with mating stub-ends
- Spectro / PMI for material verification
- Ultrasonic testing (UT) and radiography (RT) for critical components
- Magnetic particle inspection (MPI) for ferrous materials
- Hardness and tensile testing on samples where required
- Third-party inspection & EN 10204/3.1 material certificates available on request
Packing & Forwarding
Backing ring flanges are packed to prevent mechanical damage and corrosion during shipment. Typical packing options:
- Plywood cases or pallets (non-fumigated where requested)
- Steel/free-standing cages for heavy or oversized rings
- Individual wrapping with moisture barrier and desiccant
- Clear labelling with item code, size, material grade, heat number and destination
Typical Applications
Backing ring flanges are used where a supporting ring or backing plate is required to:
- Join stub-ends and lap-joint fittings allowing free rotation during alignment
- Provide reinforcement at pipe-to-equipment connections
- Facilitate retrofit installations using split or two-piece rings
- Improve sealing in assemblies that require gasketed backing
Contact & Export
For enquiries, technical drawings, custom designs or export quotations, contact Taurus Piping Solution via
our contact page. We manufacture backing ring flanges for local and international
projects and support project-specific documentation, inspection and packing requirements.
Note: This page is dedicated solely to backing ring / backup flanges. For customised drawings, dimensions and
material specifications please provide the project datasheet or required standard sheet.
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