Product Overview
3" IPS Stainless Steel Backup Ring SDR7.
Technical Specifications
- Product Type: Stainless Steel Backup Ring
- Pipe System: IPS
- Size: 3"
- SDR: SDR7
Dimensions


| Dimension | Value | Metric |
|---|---|---|
| Outside Diameter (OD) | 7.5 in | 190.50 mm |
| Thickness (T) | 0.938 in | 23.83 mm |
| Inner Diameter (I.D.) | 3.6 in | 91.44 mm |
| Holes (N) | 4 | — |
| Bolt Hole Diameter (B.D.) | 0.75 in | 19.05 mm |
| Bolt Circle Diameter (B.C.) | 6 in | 152.40 mm |
| Radius (R) | 0.4 in | 10.16 mm |
| Unit Weight (lbs/kgs) | 3.8 lb | 1.72 kg |
| Pressure Class (PC) | 335 | — |
| FM Rating (psi) | FM(200psi) | — |
Material
Stainless Steel ASTM A351 CF8M (SS316).
Drilling Standards
- ASME/ANSI B16.5
- ASME/ANSI B16.47
- ASME B16.1
- AWWA C207
Finish
Picking and passivation.
Application
HDPE flange adapter connections
Design Simulation

Available Options
CQ Brand Identification
CQ branded products are marked for product identification and traceability.

Quality Control
Representative quality-control and handling references:
- Dimensional Inspection
- EN 10204 3.1 Material Certificate
- Appearance and Surface Inspection
- Protective Packing
- Product Photos Before Shipment






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