ASTM A182 Gr F91 Alloy Steel Flanges

Get a Price/Quote

ASTM A182 Gr F91 Alloy Steel Flanges Specification

Purity
High Alloy Content

Feature
Corrosion Resistant, High Strength, Precise Dimensions

Dimension (L*W*H)
Custom / As per Drawing / Standard Sizes

Grade
F91

Application
Oil & Gas Industry, Petrochemical, Power Plant, Chemical, Fertilizer, Engineering, Paper & Pulp, Construction

Product Type
Flange

Material
Alloy Steel (Grade F91)

Standard
ASTM A182

Shape
Round

Surface
Black, Rust Proof Oil Coated, Smooth Finish

Connection
Welded / Threaded / Slip-On / Blind / Socket Weld / Lap Joint / Orifice / Spectacle Blind

Technics
Forged

Pressure
Class 150, 300, 600, 900, 1500, 2500

Size
1/2 to 48 (DN15 to DN1200)

Color
Black

About ASTM A182 Gr F91 Alloy Steel Flanges

What Are Specification ASTM A182 Gr F91 Alloy Steel Flanges?

Specification	ASTM A182 F1 Flanges
Other Standard	B16.47 Series A & B/ B16.48, BS4504/ GOST
Production Technique	Forged/ Heat treated and machined
Manufacturer of	Forged/ Threaded/ Screwed / Plate
Available Size	NPS 1" To 16 Manufacturer In India
List Of Schedule	SCH 5S, SCH 10, SCH 40, SCH 80, SCH 120, SCH 160, SCH 180.
Standard And Dimensions	DIN 2501/ DIN 2527/ JIS/ ISO/ P235GH/ API/ EN 1092-2/ EN/ BS/ DIN 2561/ EN 1092-1
Manufacturer Types	Slip On/ Threaded/ Reducing/ Weld Neck/ Socket Weld/ Blind/ Lap Joint
Flange Test	Hydrostatic testing machine/ UI trasonic flaw detector/ X-ray detector/ Direct-reading Spectrograph/ Magnetic particle detector
Coating	Anti-rust Paint/ Zinc Plated/ Oil Black Paint/ Yellow Transparent/ Cold and Hot Dip Galvanized
Methods	Forging Casting Rolling Cutting
EN Standard	6Bar/ 10Bar/ 16Bar/ 25Bar/ 40Bar
DIN Standard	PN6/ PN10/ PN16/ PN25/ PN40/ PN64
JIS Standard	5K/ 10K/ 16K 20K/ 30K/ 40K/ 63K
Flange Equipment	Pushing Machine/ electric bevelling machine/ Press machine/ Bending machine/ Sand-blasting machine etc
Face Type	Raised Face Flat Face Ring Type Joint
Most common types	Weld Neck Ring Flanges (WNRF) Blind Ring Flanges (BLRF) Threaded Ring Flanges Lap Joint Ring Flanges (LJRF) Slip-On Ring Flanges (SORF) Socket Weld Ring Flanges (SWRF) Ring Type Joint Flanges (RTJF)
UNI Standard	6 Bar/ 10 Bar/ 16 Bar/ 25 Bar/ 40 Bar
Supporting Material	Gasket/ Ring Joint/ Flange Bolts
Test Certificates	EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc
Manufacturer Pressure Class	Class 150 (lb) up to 24" Class 300 (lb) up to 20" Class 600 (lb) up to 20" Class 900 (lb) up to 16" Class 1500 (lb) up to 10" Class 2500 (lb) up to 8"

Equivalent material Of ASTM A182 Gr F91 Alloy Steel Flanges?

Trade Name	UNS	Name Of Steel	Use	Casting Equivalent	EN	Forging	Werkstoff
Alloy Steel F22	K21590	2.1/4Cr-1Mo	HP Steam	ASTM A217 WC9	10CRM0910	ASTM A182 F22	1.7380

Chemical Composition Of ASTM A182 Gr F91 Alloy Steel Flanges?

Grade	C	si	mn	s	P	Cr	Mo
ASTM A182 F22	0.05 - 0.15	0.50 max	0.30 - 0.60	0.040	0.040	2.00 - 2.50	0.87 - 1.13

Mechanical Properties Of ASTM A182 Gr F91 Alloy Steel Flanges?

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Rockwell B (HR B) max	Brinell (HB) max
F22	415	205	20		170 max

Robust Construction and Standards Compliance

These alloy steel flanges are manufactured following ASTM A182 standards, making them suitable for critical applications in oil & gas, petrochemical, power, and chemical industries. Each flange undergoes strict quality checks and is clearly marked with heat numbers, size, pressure class, and standard for full traceability.

Tailored Performance and Versatility

With excellent machinability, superior weldability, and a hardness of max 250 HB, F91 Flanges are versatile for different connection methods like welded, threaded, slip-on, orifice, and spectacle blind. Custom dimensions ensure compatibility with various project requirements, while the black surface ensures durability and resistance to environmental degradation.

Reliable Packing and Global Supply

Every order is packed securely in wooden cases or pallets to prevent damage during transit. As a trusted manufacturer, exporter, and supplier based in India, we ensure consistent global delivery, meeting minimum order quantities as per client requirement and providing documentation for ASME and ASTM compliance.

FAQs of ASTM A182 Gr F91 Alloy Steel Flanges:

Q: What types of end connections are available for ASTM A182 Gr F91 Alloy Steel Flanges?

A: These flanges are available with Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ) end connections, catering to various operational and sealing requirements in demanding environments.

Q: How are F91 Alloy Steel Flanges heat treated, and what is the significance?

A: The flanges are normalized and tempered, a process that enhances their strength, toughness, and durability while improving their resistance to stress, making them suitable for high-pressure applications.

Q: When should ASTM A182 Gr F91 Flanges be used in industrial projects?

A: These flanges are ideal for critical processes in oil & gas, petrochemical plants, power stations, and chemical industries where high strength, excellent weldability, and corrosion resistance are required.

Q: Where are ASTM A182 Gr F91 Alloy Steel Flanges typically applied?

A: They are commonly used in oil refineries, petrochemical facilities, power generation plants, fertilizer manufacturing, pulp & paper processing, and construction projects that demand robust jointing solutions.

Q: What is the process for ensuring the quality and traceability of F91 flanges?

A: Each flange is marked with the cast/forge heat number, size, pressure class, and standard. They undergo impact testing at -46C, hardness checks (max 250 HB), and dimensional inspection according to ASME B16.5/B16.47.

Q: How do clients benefit from using ASTM A182 Gr F91 flanges?

A: Clients experience reliable performance due to the flanges high alloy content, corrosion resistance, precision dimensions, and long lifecycle, minimizing maintenance and ensuring safe, consistent operations.

Tell us about your requirement