Haihao Group Supplies ASME B16.48 Spectacle Blinds and Spacer Rings to a Singapore Project
As part of our continued cooperation with global clients, Haihao Group has recently completed the shipment of a range of flange products to a valued customer in Singapore. This batch includes spectacle blinds (figure-8 blanks), spacer rings, and paddle blanks manufactured in accordance with ASME B16.48.
The supplied products cover various sizes and pressure ratings, including 2″ to 24″ diameters and Class 300# to Class 900#, meeting the project’s requirements for pipeline isolation and maintenance operations.
ASME B16.48 spectacle blinds and spacer rings manufactured by Haihao Group
Product Overview
| Product Type | Size | Pressure Rating | Standard | Material |
|---|---|---|---|---|
| Paddle Blank (FF) | 24″ | 300# | ASME B16.48 | ASTM A516 Gr.60 |
| Spacer Ring (FF) | 24″ | 300# | ASME B16.48 | ASTM A516 Gr.60 |
| Paddle Blank (FF) | 12″ | 300# | ASME B16.48 | ASTM A516 Gr.60 |
| Spacer Ring (FF) | 12″ | 300# | ASME B16.48 | ASTM A516 Gr.60 |
| Spacer Ring (FF) | 16″ | 300# | ASME B16.48 | ASTM A516 Gr.60 |
| Paddle Blank (FF) | 12″ | 300# | ASME B16.48 | ASTM A516 Gr.60 |
| Figure-8 Blind (FF) | 2″ | 300# | ASME B16.48 | ASTM A516 Gr.60 |
| Figure-8 Blind (RTJ) | 2″ | 900# | ASME B16.48 | ASTM A240 Gr.316 |
All products were precision-machined, dimensionally verified, and tested for quality conformance before delivery. The carbon steel items were made from ASTM A516 Grade 60, known for excellent strength and impact resistance, while the stainless steel blind flange was manufactured from ASTM A240 Grade 316, offering superior corrosion resistance for offshore and chemical environments.
Quality and Compliance
Haihao Group ensures that every flange and fitting adheres to the highest international standards.
All products conform to:
- ASME B16.48 – Line blank dimensions and tolerances
- ASTM A516 Gr.60 / A240 Gr.316 – Verified material grades
- Full Material Test Certificates (MTCs) ensuring traceability and mechanical integrity
Our inspection process includes dimensional checks, surface quality assessment, and marking verification according to MSS SP-25.
Applications
These spectacle blinds, spacer rings, and paddle blanks are widely used for pipeline isolation, inspection, and maintenance in oil & gas, petrochemical, and power industries. Their design allows easy switch between open and closed positions during system operation shutdowns, ensuring safe and reliable flow control.
Commitment to Global Clients
With decades of experience in flange and piping component manufacturing, Haihao Group continues to provide customized solutions and fast delivery for international engineering projects.
From ASME, DIN, EN, and JIS standards, our extensive product range covers all types of industrial flanges, fittings, and pipe accessories.