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.

ASME B16.48 Duplex Steel Nickel-Based Alloy Stainless Steel Spectacle Blind Flange

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).
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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.

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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.

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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.

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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.

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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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