ASTM A350 LF2 Blind Flanges manufacturer in India

What is the difference between an ASTM A350 LF2 Class 1 and Class 2 BLRF Flange?

Both classes have the same chemical composition. The mechanical properties of a Class 1 A350 LF2 BLRF flange and Class 2 are also identical.

The prime difference is the minimum applicable temperature, which is also valid for the Charpy V-notch impact test. An ASTM A350 LF2 Class 1 flat face blind flange has a min. applicable temperature of -50°F or -46°C. But for Class 2, it stands at -0°F or -18°C.

Check difference between ASTM A350 LF2 Class 1 Flat Face Blind Flange and SA350 LF2 Class 2 BLRF Flange

How do you prevent A350 LF2 BLRF Flange face corrosion?

This flange material has moderate corrosion resistance, which can get boosted by a protective coating. For instance, an ASTM A350 LF2 Cl1 blind weld flange can undergo anti-rust painting or galvanisation (zinc coating).

Another way to prevent corrosion is to choose high-quality and application-appropriate components with thorough testing. A 350 LF2 high hub blind flanges need routine maintenance to clean debris and damage.

view corrosion properties of A350 LF2 Class 2 BLRF Flange and SA350 Gr LF2 Blind Flange as per ANSI B16.5 standards

A350 LF2 High Hub Blind Flanges and ASME SA 350 LF2 Class 1 BLRF Flange used in low temperature applications

We keep ready stock of ASTM A350 LF2 Cl1 Blind Weld Flange and A350 LF2 BLRF Flange in Mumbai

What are the 6 applications of an SA 350 LF2 Blind Flange?

An SA 350 LF2 blind flange can handle higher pressures but operates at low temperatures. They connect and seal off pipe ends in these sectors:

• Oil and gas production
• Fossil fuel power plants
• Shipbuilding
• Construction
• Petrochemicals and nuclear power
• Heavy oil refineries

What are the 8 drawbacks of an A350 Gr LF2 Reducing Blind Flange?

These flanges have a different-sized connection compared to the pipe bore. An A350 Gr LF2 reducing blind flange connects larger and smaller pipes, sealing off one end. It eliminates the need for a reducer.

We recommend being wary of these potential drawbacks:

• Not suited to regions of abrupt transitions
• Faces high-pressure losses
• Creates sudden turbulence if used near pumps
• Should be considered when space limitations make a weld neck flange and reducer difficult
• A reducing SA350 LF2 Cl1 raised face blind flange is unsuitable for applications exposed to high temperature
• Inappropriate for severely corrosive agents
• Best avoided for setups with frequent and sudden turbulence
• Not very commonly used in piping

How do I choose ASTM A350 Gr LF2 Blind Flange thickness?

Manufacturers produce an ASTM A350 Gr LF2 blind flange in various thicknesses. It depends on the pressure exerted and the diameter of the piping.

When choosing the desired dimensions, customers should assess the allowable stress in N/mm2, the corrosion allowance in mm, and the internal diameter of the gasket, if used.

Frequently asked questions:

What is the hardness of an A350 LF2 Cl1 Blind Flange?

The maximum hardness of an A350 LF2 Cl1 blind flange is 197 HB. It conforms to the NACE MR0175 requirements for crude oil sectors.

What is the yield strength of an SA 350 LF2 Class 1 Blind Flange?

An SA 350 LF2 class 1 blind flange has a yield strength of 240 to 250Mpa or 36KSi.

What is the low temp for an A350 LF2 Class 2 BLRF Flange?

The low temperature of ASTM A350 LF2 flanges from Class 2 is above −29°C or −20°F.