ASME B16.48 Duplex Steel Spectacle Blind Flange
The Spectacle Blind is an isolating device for piping systems that consists of two parts: a solid blind and an annular gasket connected by a metal shank.
High-Quality Spectacle Blind Flange
Pipe Size (Nominal Pipe Size, NPS)
- Range: 1/2″ to 48″ (DN15 to DN1200).
- Common Sizes: 1/2″, 2″, 4″, 6″, 8″, 10″, 12″, 16″, 20″, 24″, etc.
Pressure Rating
- Standard Ratings: 150#, 300#, 600#, 900#, 1500#, 2500#.
- Special Ratings: Customizable according to customer requirements.
Thickness
- According to ASME B16.48 standards, thickness is related to pipe size and pressure rating, typically ranging from 3 mm to 50 mm.
Standards and Certifications
- ASME B16.48: Design and manufacturing standard for Spectacle Blinds.
- MSS SP-53: Quality inspection standard for Spectacle Blinds.
- NACE MR0175/ISO 15156: Suitable for sour environments (e.g., oil and gas with hydrogen sulfide).
Material Grades
Duplex Steel
UNS S31803 (2205): The most common duplex stainless steel, offering excellent corrosion resistance and mechanical properties.
UNS S32750 (2507): Super duplex stainless steel, with higher corrosion resistance and strength, suitable for more demanding environments.
Nickel-Based Alloy
Inconel 625 (UNS N06625): High corrosion resistance, suitable for high-temperature and high-pressure environments.
Hastelloy C276 (UNS N10276): Excellent corrosion resistance, suitable for strong acid and alkali environments.
Stainless Steel
304/304L (UNS S30400/S30403): General-purpose stainless steel, suitable for most industrial environments.
316/316L (UNS S31600/S31603): Higher corrosion resistance, suitable for chemical and marine environments.
Typical Applications
Oil and Gas: Used for pipeline isolation and process switching.
Chemical Industry: Suitable for isolating corrosive media.
Power Industry: Used for isolating high-temperature and high-pressure steam pipelines.
One-Stop Flange Provider for All Your Needs
SSM has significant product advantages in manufacturing ASME B16.48 Spade Blind Flange . Whether it’s quality or price, we will meet your needs.
More Information About Spade Blind Flange
UNS S31803 NPS 8 300# Spectacle Blind Flange
Material: UNS S31803 (Duplex Steel 2205).
Size: NPS 8″ (DN200).
Pressure Rating: 300#.
Thickness: 12 mm.
Standards: ASME B16.48, NACE MR0175 certified.
If you require Spectacle Blinds with specific materials, sizes, or standards, or need customized solutions, please contact SSM! We will provide you with professional technical support and product services.
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