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Forged Steel Flange

Manufactured through controlled hot-forging from premium pipe billet, these flanges deliver superior grain structure, uniform mechanical properties, and zero casting defects. Suited for critical service in high-pressure and high-temperature pipelines, they connect piping systems, valves, and equipment with exceptional integrity. Available in carbon, alloy, and stainless steel grades, each flange is produced to ASTM and ASME standards making them a dependable, export-ready solution for the oil & gas, chemical, petrochemical, and power generation sectors.
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Description

Manufactured through controlled hot-forging from premium pipe billet, these flanges deliver superior grain structure, uniform mechanical properties, and zero casting defects. Suited for critical service in high-pressure and high-temperature pipelines, they connect piping systems, valves, and equipment with exceptional integrity. Available in carbon, alloy, and stainless steel grades, each flange is produced to ASTM and ASME standards making them a dependable, export-ready solution for the oil & gas, chemical, petrochemical, and power generation sectors.

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Design Features

Feature Details
Body Design Circular plate-type forged body; seamless grain flow structure eliminates porosity, inclusions, and internal voids
Connection Type Six types — Slip-On, Weld Neck, Blind, Socket Weld, Lap Joint (Ring), and Threaded; selected per service requirement
Leak Protection Precision-machined seating faces ensure full metal-to-gasket contact; compatible with RTJ, RF, and FF gasket arrangements
Corrosion Resistance Lower carbon content vs. cast iron reduces oxidation risk; stainless and alloy grades provide enhanced resistance in aggressive media
Pressure Handling Rated from Class 150 to Class 2500; suitable for extreme high-pressure transmission and processing service
Temperature Resistance Performs reliably from cryogenic conditions (ASTM A350 LF2) to high-temperature service; alloy grades rated above 500 °C
Maintenance Bolted assembly facilitates quick disassembly, inspection, and reassembly without pipe modifications; low lifecycle maintenance cost
Durability Compact, uniform internal structure; superior shear and tensile strength; extended fatigue life under cyclic pressure loads
Automation Compatibility Standard bolt-hole patterns per ASME B16.5 ensure compatibility with automated assembly systems and torque equipment
Industrial Standards Manufactured per ASME B16.5, B16.47, MSS SP-44, API 605; material per ASTM A105, A182, A350, A694

Technical Specifications

Specification Details
Product Type Forged Steel Pipe Flange
Size Range NPS ½" to NPS 24" (B16.5) / NPS 26" to NPS 60" (B16.47)
Material Grade Carbon Steel: ASTM A105, A694 F42–F70 | Alloy Steel: A182 F5, F9, F11, F12, F21, F22 | Stainless: A182 F304, F316
End Connection Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ)
Pressure Rating Class 150 / 300 / 600 / 900 / 1500 / 2500 LB
Temperature Range -196 °C to +600 °C (grade-dependent); cryogenic grades available per ASTM A350
Seat Material Integral forged body (no separate seat insert); face finish to ASME B16.5 Ra requirements
Operation Type Mechanical bolted assembly; manual tightening or torque-controlled
Port Type Full bore; bore matches nominal pipe inside diameter to minimize flow resistance
Surface Finish 125–250 AARH raised face; smooth finish for RTJ groove; mill scale or phosphate coated per requirement
Applicable Media Steam, oil, gas, LNG, water, chemicals, acids (grade-dependent), seawater
Testing Standard API 598, ASME B16.5 pressure-temperature rating tables; MSS SP-44 for pipeline flanges
Manufacturing Standard ASME B16.5, ASME B16.47 Series A & B, MSS SP-44, API 605

Benefits & Application

Benefits Applications
High Structural Durability Oil & Gas Pipelines
Superior Corrosion Resistance Chemical Processing Plants
Leak-Proof Sealing Performance Water Treatment & Distribution
Low Lifecycle Maintenance Pharmaceutical Manufacturing
Long Operational Service Life Food & Beverage Processing
Full-Bore Smooth Media Flow Petrochemical & Refinery Plants
Class 150–2500 Pressure Rated Power Generation & Utilities
Cryogenic & High-Temp Grades Marine, HVAC & LNG Systems

Testing Parameters

Test Type Description
Hydro Test Hydraulic pressure applied at 1.5× rated working pressure; held for minimum 30 seconds to verify body and joint integrity
Pneumatic Test Air or inert gas test at 1.1× rated pressure for applications where water contamination is restricted; per ASME B16.5
Shell Test Full body pressure test applied to confirm structural integrity of the forged shell under operating pressure conditions
Seat Leakage Test Face contact surface inspected for finish, flatness, and Ra roughness per ASME B16.5; gasket seating area verified dimensionally
Pressure Endurance Test Sustained pressure verification over extended hold periods for Class 900, 1500, and 2500 rated flanges in critical service
Material Inspection PMI (Positive Material Identification) and chemical composition analysis per respective ASTM material specification
Dimensional Accuracy Test Full dimensional check per ASME B16.5 / B16.47 including bolt circle, raised face OD, bore, and thickness tolerances
Surface Finish Inspection Profilometer measurement of seating face; raised face finish 125–250 AARH; RTJ groove verified for hardness and profile
Quality Certification Mill Test Report (MTR) / Material Test Certificate (MTC) per EN 10204 3.1 or 3.2; third-party inspection available on request

Forged Steel Flange

Manufactured through controlled hot-forging from premium pipe billet, these flanges deliver superior grain structure, uniform mechanical properties, and zero casting defects. Suited for critical service in high-pressure and high-temperature pipelines, they connect piping systems, valves, and equipment with exceptional integrity. Available in carbon, alloy, and stainless steel grades, each flange is produced to ASTM and ASME standards making them a dependable, export-ready solution for the oil & gas, chemical, petrochemical, and power generation sectors.

Design Features

Feature Details
Body Design Circular plate-type forged body; seamless grain flow structure eliminates porosity, inclusions, and internal voids
Connection Type Six types — Slip-On, Weld Neck, Blind, Socket Weld, Lap Joint (Ring), and Threaded; selected per service requirement
Leak Protection Precision-machined seating faces ensure full metal-to-gasket contact; compatible with RTJ, RF, and FF gasket arrangements
Corrosion Resistance Lower carbon content vs. cast iron reduces oxidation risk; stainless and alloy grades provide enhanced resistance in aggressive media
Pressure Handling Rated from Class 150 to Class 2500; suitable for extreme high-pressure transmission and processing service
Temperature Resistance Performs reliably from cryogenic conditions (ASTM A350 LF2) to high-temperature service; alloy grades rated above 500 °C
Maintenance Bolted assembly facilitates quick disassembly, inspection, and reassembly without pipe modifications; low lifecycle maintenance cost
Durability Compact, uniform internal structure; superior shear and tensile strength; extended fatigue life under cyclic pressure loads
Automation Compatibility Standard bolt-hole patterns per ASME B16.5 ensure compatibility with automated assembly systems and torque equipment
Industrial Standards Manufactured per ASME B16.5, B16.47, MSS SP-44, API 605; material per ASTM A105, A182, A350, A694

Technical Specifications

Specification Details
Product Type Forged Steel Pipe Flange
Size Range NPS ½" to NPS 24" (B16.5) / NPS 26" to NPS 60" (B16.47)
Material Grade Carbon Steel: ASTM A105, A694 F42–F70 | Alloy Steel: A182 F5, F9, F11, F12, F21, F22 | Stainless: A182 F304, F316
End Connection Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ)
Pressure Rating Class 150 / 300 / 600 / 900 / 1500 / 2500 LB
Temperature Range -196 °C to +600 °C (grade-dependent); cryogenic grades available per ASTM A350
Seat Material Integral forged body (no separate seat insert); face finish to ASME B16.5 Ra requirements
Operation Type Mechanical bolted assembly; manual tightening or torque-controlled
Port Type Full bore; bore matches nominal pipe inside diameter to minimize flow resistance
Surface Finish 125–250 AARH raised face; smooth finish for RTJ groove; mill scale or phosphate coated per requirement
Applicable Media Steam, oil, gas, LNG, water, chemicals, acids (grade-dependent), seawater
Testing Standard API 598, ASME B16.5 pressure-temperature rating tables; MSS SP-44 for pipeline flanges
Manufacturing Standard ASME B16.5, ASME B16.47 Series A & B, MSS SP-44, API 605

Benefits & Application

Benefits Applications
High Structural Durability Oil & Gas Pipelines
Superior Corrosion Resistance Chemical Processing Plants
Leak-Proof Sealing Performance Water Treatment & Distribution
Low Lifecycle Maintenance Pharmaceutical Manufacturing
Long Operational Service Life Food & Beverage Processing
Full-Bore Smooth Media Flow Petrochemical & Refinery Plants
Class 150–2500 Pressure Rated Power Generation & Utilities
Cryogenic & High-Temp Grades Marine, HVAC & LNG Systems

Testing Parameters

Test Type Description
Hydro Test Hydraulic pressure applied at 1.5× rated working pressure; held for minimum 30 seconds to verify body and joint integrity
Pneumatic Test Air or inert gas test at 1.1× rated pressure for applications where water contamination is restricted; per ASME B16.5
Shell Test Full body pressure test applied to confirm structural integrity of the forged shell under operating pressure conditions
Seat Leakage Test Face contact surface inspected for finish, flatness, and Ra roughness per ASME B16.5; gasket seating area verified dimensionally
Pressure Endurance Test Sustained pressure verification over extended hold periods for Class 900, 1500, and 2500 rated flanges in critical service
Material Inspection PMI (Positive Material Identification) and chemical composition analysis per respective ASTM material specification
Dimensional Accuracy Test Full dimensional check per ASME B16.5 / B16.47 including bolt circle, raised face OD, bore, and thickness tolerances
Surface Finish Inspection Profilometer measurement of seating face; raised face finish 125–250 AARH; RTJ groove verified for hardness and profile
Quality Certification Mill Test Report (MTR) / Material Test Certificate (MTC) per EN 10204 3.1 or 3.2; third-party inspection available on request

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