INDUSTRY COMPONENT

Flange Body

A forged steel flange body is a robust, ring-shaped component used to connect pipes, valves, pumps, and other equipment in high-pressure industrial piping systems.

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Component Specifications

Definition
The flange body is the primary structural element of a forged steel flange, designed to provide a secure, leak-proof connection between piping components. It features a flat, machined face for gasket sealing, bolt holes for assembly, and a central bore matching the pipe diameter. Manufactured through hot forging processes, it exhibits superior mechanical properties including high strength, toughness, and resistance to fatigue and impact, making it suitable for critical applications in petrochemical, power generation, and heavy industrial systems.
Working Principle
The flange body works by creating a bolted, gasketed joint between two piping components. When bolts are tightened through the flange's holes, compressive force is applied, squeezing the gasket between the mating faces to form a pressure-tight seal. The forged steel construction ensures the body withstands internal fluid pressure, external loads, and thermal expansion without deformation, maintaining joint integrity under operational stresses.
Materials
ASTM A105 (Carbon Steel), ASTM A182 F304/F316 (Stainless Steel), ASTM A350 LF2 (Low-Temperature Carbon Steel), with optional coatings like galvanizing or epoxy for corrosion protection.
Technical Parameters
  • Face Type Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ)
  • Size Range 1/2 inch to 24 inches NPS
  • Surface Finish 125 to 250 microinches for gasket seating
  • Pressure Rating Class 150 to Class 2500
  • Temperature Range -29°C to 538°C depending on material grade
  • Bolt Hole Quantity 4 to 48 holes
  • Bolt Circle Diameter As per ASME B16.5 standards
Standards
ASME B16.5, ASME B16.47, ISO 7005-1, DIN 2633

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Flange Body.

forged steel flange body industrial flange pipe flange high-pressure flange ASME B16.5 flange flange specifications piping components Flange Body Flange Body in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Forged Steel Flange

Metal ring connecting pipes, valves, or equipment

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Engineering Analysis

Risks & Mitigation
  • Leakage due to improper gasket seating or bolt torque
  • Corrosion in aggressive chemical environments
  • Fatigue failure from cyclic pressure or thermal stresses
  • Misalignment causing uneven load distribution
FMEA Triads
Trigger: Insufficient bolt torque or uneven tightening
Failure: Gasket compression loss leading to leakage
Mitigation: Use calibrated torque wrenches and follow cross-tightening patterns as per ASME PCC-1 guidelines.
Trigger: Exposure to corrosive fluids without protective coatings
Failure: Material degradation and pitting, reducing pressure integrity
Mitigation: Select corrosion-resistant materials (e.g., stainless steel) or apply protective coatings; implement regular inspection schedules.
Trigger: Thermal cycling causing expansion/contraction stresses
Failure: Fatigue cracking at bolt holes or weld necks
Mitigation: Design with adequate flexibility in piping layout; use expansion joints; ensure proper material selection for temperature range.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Bolt hole diameter ±0.8 mm, bolt circle diameter ±1.6 mm, face flatness within 0.05 mm per ASME B16.5
Test Method
Hydrostatic pressure testing at 1.5 times rated pressure for 10 minutes; non-destructive testing (NDT) such as ultrasonic or magnetic particle inspection for critical applications.

Buyer Feedback

★★★★☆ 4.9 / 5.0 (18 reviews)

"Testing the Flange Body now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Flange Body meets all ISO standards."

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Frequently Asked Questions

What is the advantage of a forged steel flange body over a cast one?

Forged steel flange bodies offer superior strength, ductility, and resistance to impact and fatigue compared to cast flanges, making them ideal for high-pressure, high-temperature, and critical service applications.

How do I select the correct pressure class for a flange body?

Select based on the maximum operating pressure and temperature of your system, referencing ASME B16.5 standards. Common classes include 150, 300, 600, 900, 1500, and 2500, with higher numbers indicating greater pressure capacity.

Can flange bodies be used with different pipe materials?

Yes, but material compatibility must be considered to avoid galvanic corrosion. For example, a carbon steel flange body can connect to stainless steel pipes using appropriate gaskets and bolts, but insulation kits may be needed in corrosive environments.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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