Flanges and Gaskets: Size Range DN15 to DN600

Component Specifications

Definition

Flanges are protruding rims, edges, or collars used to connect pipes, valves, pumps, and other equipment to form a piping network. They provide a method for assembly, disassembly, and maintenance access. Gaskets are sealing materials placed between flange faces to create a pressure-tight seal by filling microscopic irregularities, preventing fluid or gas leakage under various pressure, temperature, and chemical conditions.

Working Principle

Flanges create a bolted joint connection between piping components, while gaskets utilize compression between flange faces to form a seal. When bolts are tightened, the gasket material deforms to fill surface imperfections, creating a barrier against media escape. The sealing effectiveness depends on proper bolt torque, gasket material properties, flange surface finish, and operating conditions.

Materials

Flanges: Carbon steel (ASTM A105, A350), stainless steel (ASTM A182 F304/316), alloy steel, ductile iron. Gaskets: Non-metallic (rubber, PTFE, graphite), semi-metallic (spiral wound, camprofile), metallic (ring type, flat).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Face Type	RF, FF, RTJ
Size Range	DN15 to DN600
Pressure Rating	150-2500 psi
Temperature Range	-50°C to 800°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 7005-1, ASME B16.5, ASME B16.47, DIN EN 1092-1

Parent Products

This component is used in the following industrial products

Piping Network

A system of interconnected pipes that distributes cooling fluid throughout the laminar cooling system.

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Engineering Analysis

Risks & Mitigation

Improper bolt torque causing leaks
Gasket blowout under high pressure
Corrosion from incompatible materials
Thermal cycling fatigue

FMEA Triads

Trigger: Incorrect gasket selection
Failure: Chemical degradation and leakage
Mitigation: Match gasket material to fluid compatibility charts

Trigger: Uneven bolt tightening
Failure: Flange distortion and seal failure
Mitigation: Use calibrated torque wrenches and cross-tightening sequence

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Flange dimensions per ASME B16.5 ±0.8mm, surface finish 125-250 µin Ra

Test Method

Hydrostatic/pneumatic pressure testing, helium leak detection, visual inspection per ASME PCC-1

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Flanges and Gaskets

Manufacturer profiles associated with Flanges and Gaskets.

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Frequently Asked Questions

What are the main types of flange faces?

Raised face (RF), flat face (FF), ring-type joint (RTJ), and male-female configurations for different pressure and sealing requirements.

How often should gaskets be replaced?

During maintenance shutdowns, when leaks are detected, or when disassembling connections. Replacement frequency depends on operating conditions and gasket material.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Flanges and Gaskets