ASTM A181 Flanges

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ASTM A181 Flanges Specification

Dimension (L*W*H)
As per order/specification

Grade
Class 60, Class 150, Class 300, Class 400, Class 600, Class 900, Class 1500, Class 2500

Feature
Corrosion Resistant, High Strength, Durable, Precise Dimension

Purity
Standard commercial grade

Application
Industrial, Oil & Gas, Petrochemical, Power Plant, Chemical, Shipbuilding

Product Type
Flange

Material
Carbon Steel

Standard
ASTM A181

Shape
Round

Surface
Rust Proof

Connection
Welded

Technics
Forged

Pressure
High Pressure

Size
Customizable

Color
Silver

About ASTM A181 Flanges

What Are Specification ASTM A181 Flanges?

ASME B16.5 size range	1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Standards	ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flanges.
Standard UNI	6Bar 10Bar 16Bar 25Bar 40Bar
Standard JIS	5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
Standard ANSI	Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Standard DIN	6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
Flange supporting material	Gasket, Ring Joint, Flange Bolts

Chemical Composition Of ASTM A181 Flanges?

ELEMENT	COMPOSITION, %
Carbon	0.35 max
Manganese	0.60-1.05
Phosphorus	0.035 max
Sulfur	0.040 max
Silicon	0.10-0.35
Copper	0.40 max (1)
Nickel	0.40 max (1)
Chromium	0.30 max (1-2)
Molybdenum	0.12 max (1-2)
Vanadium	0.08 max

Mechanical Properties Of ASTM A181 Flanges?

Mechanical Properties	Requirements
Tensile strength,min,psi [MPa]	70000 [485]
Yield strength,min,psi [MPa]	36000 [250]
Elongation, min, %	30
Reductionofarea,min,%	30
Hardness,HB,max	187

Comprehensive Range of Flange Types

ASTM A181 flanges are available in a variety of types: slip-on, weld neck, blind, socket weld, threaded, lap joint, and orifice. Each type suits different pipeline configurations and requirements, making them highly versatile for complex industrial installations. Users can choose specific flange facesRF, FF, or RTJto match application needs and ensure secure, leak-free connections.

Superior Material and Strength

Manufactured from durable carbon steel, these flanges undergo rigorous heat treatments such as normalizing, annealing, and quenching & tempering. This enhances their mechanical properties, resulting in high strength, corrosion resistance, and long-term reliability even under high-pressure conditions.

Customizable Dimensions and Pressure Ratings

Clients can order ASTM A181 flanges in a range of sizes and pressure classesfrom Class 60 up to Class 2500tailored according to ANSI/ASME B16.5 standards or specific project drawings. This adaptability allows for precise integration into varied industrial systems, ensuring optimal functionality and safety in every application.

FAQs of ASTM A181 Flanges:

Q: How are ASTM A181 flanges typically used in industrial applications?

A: ASTM A181 flanges are commonly employed to connect pipes, valves, pumps, and other equipment within high-pressure systems in industries like oil & gas, petrochemicals, power plants, and shipbuilding. Their robust design and range of types accommodate diverse installation requirements where dependable leak-proof connections are essential.

Q: What flange types and face finishes are available with ASTM A181 flanges?

A: These flanges can be supplied as slip-on, weld neck, blind, socket weld, threaded, lap joint, or orifice types. Available face finishes include Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ), allowing for compatibility with various piping designs and sealing needs.

Q: When should I choose a specific heat treatment for A181 flanges?

A: The choice of heat treatmentnormalizing, annealing, quenching, or temperingdepends on the desired mechanical properties and service environment. For example, quenching and tempering enhance strength and durability for high-pressure settings, while annealing provides improved ductility for easier installation.

Q: Where are ASTM A181 flanges commonly sourced or manufactured?

A: These flanges are widely manufactured and exported from India by reputed suppliers, manufacturers, and traders. They are available worldwide, catering to global industrial and infrastructure projects wherever robust pipe connections are required.

Q: What benefits do ASTM A181 flanges offer over other types of flanges?

A: ASTM A181 flanges deliver excellent corrosion resistance, high mechanical strength, and precise dimensions, making them ideal for demanding and critical service conditions. Their compatibility with high-pressure ratings and customizable configurations adds to their reliability and effectiveness in industrial systems.

Q: How does the packaging ensure the safety of ASTM A181 flanges during transit?

A: Flanges are securely packed in wooden boxes, pallets, or customized packaging solutions that prevent damage, protect against moisture, and maintain the integrity of precision machined surfaces during shipping and storage.

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