However, they kept asking me some question about orders which is not ours, like: I consulted other suppliers about ASTM A350 LF2 Blind Flanges ,why couldn’t they offer me quotation….Because we also manufacture the items they have question with, I confirmed these questions with our factory and solved their queries.In the end, I get several purchase orders from this value customer.

Purchase Order List

ASTM A350 GRADE LF2 Flanges Properties

The ASTM A350 LF2 flanges is a forged carbon/ low-alloy steel forged flanges, this material is also for forged fittings and valves intended primarily for low-temperature service and requiring notch toughness testing.

Chemical Composition %

Mechanical Properties

ASTM A182 F316 /F316L ASME B16.5 Flanges Properties

Stainless steel grade 316/316L is the most commonly used austenitic stainless steel in the chemical process industry. The addition of molybdenum increases general corrosion resistance, improves chloride pitting resistance and strengthens the alloy in high temperature service. Through the controlled addition of nitrogen it is common for 316/316L to meet the mechanical properties of 316 straight grade, while maintaining a low carbon content.Flanges in material A350 LF2 is better than it is in A182 F316/316L in every term.

Chemical Composition %

Physical Properties

Density: 0.285 lb/inch3
Poisson’s Ratio: 0.3
Electrical Resistivity: 445 Ohm-circ mil/ft

Mechanical Properties

We are manufacture of all kinds of ANSI / ASME B16.5 flanges (Blind, Socket Weld, Slip On, Weld Neck, Threaded, Ring Type Joint).

Specification of ASME B16.5 Flanges

Service and quality are always our goal for customers.

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Blind flange is a plate that attaches to a pipe end to block off pipeline and provides easy access for cleaning, inspection and modification. They have the same function with pipe plugs and caps, but it is detachable.

It is connected to a flange or flange fittings by bolting with a gasket between them to provide a seal. And should be placed where isolation is needed, such as the nozzle of a device, before or after a shut-off valve or between two flanges.

Gaskets have many types, such as Industrial Rubber Sheet, Asbestos Rubber Sheet, PTFE Gasket, Spiral Wound Gasket and so on. Its selection is influenced by many factors, but attention should be paid to the fluid type, temperature and pressure.

What is Raised Face?

Raised face is almost the most common sealing type among all kind of flanges and is easy to identify. This type flange has a higher gasket surface than bolting circle face. BLRF Flange can increase the pressure containment capability of the joint.

The height of raised face are fixed in most manufacture standards except ASME standard. In this standard, the raised face height will increase along with the pressure.

The flange pressure rating are: 150 LB, 300 LB , 600 LB , 900 LB , 1500 LB , and 2500 LB .

Blind Flange Specification

Material for Forged Steel Flange

We are specialized in various steel flanges, the materials including carbon steel, alloy steel and stainless steel.

Carcon Steel: ASTM A105 / A105N,ASTM A350 LF2 / LF3, A694 F42 / 46 / 52 / 56 / 65 / 70

Carbon steel refers to steel with carbon (C) as the main alloying element, with no or only a small amount of other alloying elements. Manufacturers most commonly use this type of metal material. They widely apply it in construction, machinery, pipelines, containers, automobiles, bridges, and other fields.

Alloy Steel: ASTM A182 F5 / F9 / F11 / F12 / F22 / F91 / F92

Alloys are made by combining two or more metal elements (or metal and non-metal elements) to enhance certain properties of metals, such as strength, corrosion resistance, high temperature resistance, oxidation resistance, etc. Engineers use these alloys extensively under harsh conditions such as high temperature, high pressure, strong corrosion and heavy load. Alloys are key materials in industries such as aerospace, chemical, power, shipbuilding and pressure vessel manufacturing.

Stainless Steel: A182 F304/304L/304H – F316/316L – F317 – F310S – F321 – F347 – F904L

Stainless steel is a high-alloy steel containing chromium (Cr) ≥ 10.5% and a low carbon content. As a result, it offers excellent corrosion resistance, mechanical properties, and formability. Due to these advantages, it is widely used in the chemical, food, medicine, machinery, energy, construction, and other industries.

Duplex Stainless Steel: A182 F51/53/55/60

Duplex Stainless Steel is a type of alloy steel that has the structural characteristics of both austenitic stainless steel and ferritic stainless steel. It has high strength and excellent corrosion resistance, especially strong resistance to chloride ion pitting and stress corrosion. It is widely used in marine engineering, petrochemical, papermaking, electric power, environmental protection, chemical equipment and other fields.

1500LB Raised Face Blind Flange Dimensions

• Standard: ASME B16.5.
• Length Unit: Inch.
• Weight Unit: KG

Blind Flange Inspection

2″ 1500LB Raised Face Blind Flange ASTM A105N

• Dimension of BLRF

Measure the values of flange Outside Diameter, Raised Face diameter, Thickness, Bolt Hole Numbers and Diameter, Bolt Circle Diameter and Weight. Guaranteed the values are within tolerance.

• Material Grades of Flanges

Detect the Chemical Composition and Mechanical Properties, and compared to ASTM A105 standard, ensure the material is qualified and its performance are not damaged.

• Surface of Blind Flanges

Visual check and hand touch, ensure they are smooth.

• Marking

Mark it as ” 2″1500# BLRF ASTM A105N ASME B16.5 16084″. The mark should be clear and correct.

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