Outlet Flange/Connection: Pressure Rating 150# to 2500#

Component Specifications

Definition

The outlet flange/connection is a critical piping component designed to create a leak-proof, pressure-resistant joint between the collector header's discharge port and downstream piping systems. It typically consists of a flanged face with bolt holes, gasket seating surface, and standardized dimensions that ensure proper alignment, sealing integrity, and mechanical stability under operational pressures and temperatures. This component facilitates maintenance access, system modularity, and compatibility with various pipe sizes and pressure ratings.

Working Principle

The outlet flange/connection operates on the principle of creating a mechanical seal through compressive force. When bolts are tightened through aligned bolt holes, they compress a gasket between two flanged faces, creating a pressure-tight barrier that prevents fluid leakage. The flange's raised face or flat surface ensures even gasket compression, while the bolt circle distributes clamping forces uniformly to maintain seal integrity under thermal expansion, vibration, and pressure fluctuations.

Materials

Carbon steel (ASTM A105/A350 LF2), stainless steel (ASTM A182 F304/F316), alloy steel (ASTM A182 F11/F22), with optional coatings (galvanized, epoxy) for corrosion resistance. Gasket materials: spiral wound (stainless steel + graphite/fiber), rubber (EPDM, Nitrile), PTFE.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Face Type	Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
Size Range	DN15 to DN600 (1/2" to 24")
Surface Finish	125-250 AARH for gasket seating
Pressure Rating	150# to 2500#
Temperature Range	-29°C to 538°C (-20°F to 1000°F)
Bolt Circle Diameter	As per ASME B16.5

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, DIN 2633, EN 1092-1

Parent Products

This component is used in the following industrial products

Collector Header

A distribution manifold in resin underdrain systems that collects and channels filtered water from multiple laterals.

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Engineering Analysis

Risks & Mitigation

Gasket blowout under overpressure
Bolt fatigue from vibration
Corrosion at flange face
Misalignment causing leakage
Thermal stress cracking

FMEA Triads

Trigger: Improper bolt tightening sequence or torque
Failure: Uneven gasket compression leading to leakage
Mitigation: Implement calibrated torque wrench procedures and cross-pattern tightening sequences

Trigger: Thermal cycling without expansion joints
Failure: Flange distortion and seal failure
Mitigation: Install expansion loops/bellows and use flexible gasket materials

Trigger: Corrosive fluid exposure
Failure: Flange face pitting and sealing surface degradation
Mitigation: Select corrosion-resistant materials and apply protective coatings

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Flange face flatness: 0.8mm maximum deviation across any diameter, Bolt hole alignment: ±1mm positional tolerance

Test Method

Hydrostatic pressure testing per ASME BPVC Section VIII, Helium leak testing for critical services, Visual inspection per ASME B16.5

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

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Outlet Flange/Connection

Manufacturer profiles associated with Outlet Flange/Connection.

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Frequently Asked Questions

What are the main types of outlet flange faces?

The three main types are Raised Face (RF) for general service, Flat Face (FF) for low pressure applications, and Ring Type Joint (RTJ) for high-pressure/temperature services.

How do I select the correct gasket for an outlet flange?

Select based on fluid compatibility, temperature, pressure, and flange face type. Spiral wound gaskets are common for raised faces, while full-face gaskets are used with flat face flanges.

What torque values should be used for flange bolts?

Torque values depend on bolt size, material, and gasket type. Always follow manufacturer specifications or ASME PCC-1 guidelines for proper bolt tightening sequences and torque values.

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.

Outlet Flange/Connection