API 6A Blind Flange

FeatureDescription
StandardAPI 6A (American Petroleum Institute)
PurposeTo completely isolate a section of a wellbore or pipeline during maintenance, repairs, or inspections.
ConstructionTypically made from high-strength materials like carbon steel, alloy steel, or stainless steel, depending on the application and environmental conditions.
DesignDesigned to withstand high pressures and temperatures encountered in oil and gas operations.
TypesAvailable in various types, including:
* Raised Face
* Ring Joint
* Spectacle Blind
Pressure Classes2000, 5000, 10,000, and 15,000 PSI
SizeNPS 2 to NPS 24
Applications
* Oil and gas drilling and production operations
* Pipeline construction and maintenance
* Refining and petrochemical plants
* Other high-pressure applications
Categories: ,

Description

Product Description on API 6A Blind Flange

API 6A Blind Flange is a specialized flange used in the oil and gas industry, particularly in wellhead and Christmas tree systems, to seal off the end of a pipeline or wellbore. It complies with the API 6A standard, which specifies requirements for Christmas tree and wellhead equipment. The blind flange is designed to seal a flanged connection when no further connection is required, providing a secure, leak-proof seal.

API 6A Blind Flange Dimensions

Dimensions for 2,000 PSI and 5,000 PSI Blind Flanges:

NPSOD (mm)T (mm)BC (mm)NH (mm)
2152.419.1120.7419.1
3190.522.4152.4419.1
4228.625.4190.5819.1
6279.428.4241.3822.4
8342.931.8298.5822.4
10406.435.1362.01225.4
12482.638.1431.81225.4
14533.441.1476.31228.4
16596.944.5539.81628.4
18635.047.8577.91631.8
20698.550.8635.02031.8
24812.857.2749.32035.1

Dimensions for 10,000 PSI and 15,000 PSI Blind Flanges:

NPSOD (mm)T (mm)BC (mm)NH (mm)
2215.076.2165.1826.2
3265.079.4203.2829.4
4310.082.6241.3832.4
6395.088.9317.51235.4
8485.095.3393.71238.4
10585.0101.6482.61241.4
12685.0107.9571.51644.4
14770.0114.3635.01647.4
16870.0120.7723.92050.4
18970.0127.0812.82053.4
201070.0133.4901.72456.4
241270.0146.11080.02462.0

Pressure Rating:

API 6A blind flanges are rated according to their pressure class, which depends on the flange material and design. The common pressure ratings are 2,000, 3,000, 5,000, and 10,000 PSI (pounds per square inch). These pressure ratings ensure the flange can withstand the required pressure in a specific application, whether it’s high-pressure oil and gas systems or other heavy-duty industrial uses.

Material:

API 6A blind flanges are typically made from high-quality materials that can withstand the harsh conditions found in the oil and gas industry. Common materials include:

  • Carbon Steel (A105, A350 LF2)
  • Alloy Steel (F5, F9, F11, F22)
  • Stainless Steel (304, 316)
  • Nickel Alloys (Inconel, Monel) These materials offer excellent resistance to corrosion, high strength, and durability under extreme temperatures and pressure.

Applications:

API 6A blind flanges are primarily used in the oil and gas industry for sealing pipe openings in high-pressure, high-temperature environments. Key applications include:

  • Oil and gas pipelines: To seal pipeline ends during installation or maintenance.
  • Drilling equipment: To block off unused ports on wellheads and Christmas trees.
  • Refineries and petrochemical plants: For securing ports and flanged connections during plant operation or shutdown.

Benefits:

  • Leak Prevention: Provides a reliable seal for flanged connections, preventing leakage in critical systems.
  • Durability: Made from high-strength materials, these flanges offer long-lasting performance under extreme pressure and temperature conditions.
  • Easy Installation and Maintenance: The blind flanges are designed for straightforward installation and removal during system maintenance, offering minimal downtime.
  • Cost-effective: When used for isolating systems, blind flanges help in reducing operational costs by maintaining system integrity and preventing downtime.
  • Versatile: Suitable for various pressure ratings and material types, making them adaptable to a wide range of applications.

 

 

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