Blind Flange Manufacturer and Supplier in China.

Description

Blind Flange

A Blind Flange is used to block off a pipeline or to create a stop. Like a regular flange, it has mounted holes around the perimeter and gasket sealing rings machined into the mating surface. However, the key difference is that a blind flange has no opening, preventing the passage of fluid. This makes it an essential component in pipeline systems where isolation or termination is required.

Features:

Designed and manufactured according to API 6A latest edition.
Available in all sizes and materials, including alloy steel, carbon steel, and stainless steel.
Each piece undergoes a 100% test, including:
- Hardness test
- Magnetic Particle Testing (MT)
- Nondestructive Testing (NT)
- Hydrostatic testing
Drawing Size Range: 1-13/16 in ~ 26-3/4 in

Technical Data:

Specification	Details
Working Pressure	2000PSI, 3000PSI, 5000PSI, 10000PSI, 15000PSI, 20000 PSI
Material	AISI 4130 (forged), SUS316, Inconel 625, 410 Stainless Steel
Face Types	RTJ, FF, RF
Connection Type	Bolted or Studded
Temperature Class	L-U
Material Class	BB, CC, DD, EE, FF
Product Specification Level (PSL)	PSL1, PSL2, PSL3, PSL4
Performance Requirement	PR1, PR2

Technical Data

Technical Data:

Specification	Details
Working Pressure	2000PSI, 3000PSI, 5000PSI, 10000PSI, 15000PSI, 20000 PSI
Material	AISI 4130 (forged), SUS316, Inconel 625, 410 Stainless Steel
Face Types	RTJ, FF, RF
Connection Type	Bolted or Studded
Temperature Class	L-U
Material Class	BB, CC, DD, EE, FF
Product Specification Level (PSL)	PSL1, PSL2, PSL3, PSL4
Performance Requirement	PR1, PR2

More Details:

Blind Flanges are used in applications where pipeline expansion is expected or where future pipeline extensions may be necessary.
They are widely used in industries like oil & gas, chemical processing, power generation, and offshore drilling.
The choice of material ensures high strength, corrosion resistance, and durability under extreme pressure and temperature conditions.
Different face types (RTJ, FF, RF) provide flexibility for various sealing and pressure requirements.
The testing process guarantees that each blind flange meets industry standards for safety and performance.
Available in custom sizes and configurations to match specific project needs.

More Details

Design and Construction:
- Outer Diameter: The dimensions would depend on the size of the flange required, usually based on the API 6A standards.
- Thickness: The flange thickness will also be based on the size and material class.
- Bolt Holes: These would be positioned around the perimeter of the flange (the number and size of holes depend on the specific standard and size of the flange).
- Gasket Sealing Surface: This area would be machined to ensure a proper seal when installed.
- No Central Hole: The key difference from regular flanges—no opening to allow fluid to pass through.
Material Classes and Specifications:
- Material Classes: BB, CC, DD, EE, FF (various materials like carbon steel, stainless steel, alloy steel).
- Performance Requirements: PR1, PR2, depending on pressure and temperature requirements.
- Temperature Class: L-U (used for a specific temperature range).
- Product Specification Level: PSL1, PSL2, PSL3, PSL4, indicating the quality level and testing requirements.
Testing and Quality Assurance:
- Hardness Test: Ensures the material hardness meets specified standards.
- MT (Magnetic Test): Ensures there are no surface defects.
- NT (Nondestructive Testing): Ensures structural integrity without damaging the material.
- Hydrostatic Test: Checks the pressure withstand capability of the flange.

Now, I’ll outline how to create the drawing:

View: A side profile and top-down view of the blind flange.
Dimensions: Include bolt hole locations, outer diameter, thickness, gasket sealing area, and material specifications.
Labeling: Proper labeling for each feature (e.g., bolt holes, gasket surface, thickness, etc.), and note the material class, temperature class, and testing methods.