Blind Ring Spacer (Hockey Puck): Thermoplastic Flow Isolation for Lined Pipe Systems
A Blind Ring Spacer, often called a “Hockey Puck,” is a solid thermoplastic flange spacer designed to completely block flow in a piping system. It has no central bore, aligning precisely within flange bolt holes to maintain system integrity while creating a positive shut-off.
Overview
SG-P manufactures precision-machined Blind Ring Spacers specifically for lined-pipe systems, ensuring a perfect fit, excellent chemical resistance, and long-term performance. Each spacer provides reliable isolation during maintenance, hydro testing, or temporary line shutdowns.
What Is a Blind Ring Spacer Used For?
Blind Ring Spacers are essential components in corrosion-resistant and non-metallic piping systems. They are commonly used to isolate, seal, or block fluid flow without altering the flange arrangement.
Typical uses include:
- Line isolation during plant maintenance or repair
- Hydrostatic or pressure testing of pipelines
- Flow diversion or inspection procedures
- System modifications where temporary blocking is required
- Shutdown operations for safety and compliance
Applications and Industries
- Chemical & Petrochemical Processing: isolation of lines carrying acids, solvents, or reactive compounds
- Water & Wastewater Treatment: safe line breaks for cleaning and servicing
- Pharmaceutical & Food Manufacturing: sanitary, non-contaminating flow control
- Power Generation & Utilities: scheduled maintenance isolation
- Marine & Offshore Systems: corrosion-proof, lightweight isolation solutions
Thermoplastic Material Options
- Polypropylene (PP): Lightweight and cost-effective with excellent resistance to acids, alkalis, and many organic solvents.
- PTFE (Teflon®): Exceptional chemical resistance and reliable performance under high temperatures.
- PVDF (Kynar®): UV-stable, flame-resistant, and ideal for aggressive or outdoor environments.
All spacers are based on lined-pipe dimensions and can be custom-machined to meet exact project requirements.
Design Features
- Precision-machined for lined-pipe flange dimensions
- No central bore for total line blockage
- Corrosion-resistant, non-conductive, and lightweight
- Smooth sealing faces for optimal gasket contact
- Available in Ring and Full Face configurations
Why Choose SG-P Blind Ring Spacers?
- Over 50 years of custom fabrication expertise in plastics and glass
- Fast turnaround and precision machining for non-standard sizes
- Strict in-house quality control and tight tolerances
- Full line of thermoplastic flange spacers and isolation components
Request a Quote or Custom Design
Looking for a custom Blind Ring Spacer for your lined-pipe system? SG-P offers made-to-order spacers in multiple sizes, thicknesses, and materials to meet your exact specifications.
Request a Quote