Inlet Nozzle/Flange: Temperature Range -29°C to 538°C

Component Specifications

Definition

A precision-engineered inlet nozzle/flange is a critical component that serves as the entry point for fluid media into a distribution header. It provides a secure, leak-proof connection between the supply pipeline and the header, ensuring proper flow distribution to downstream branches. This component typically consists of a flanged nozzle that bolts directly to the header body, featuring standardized dimensions and pressure ratings for compatibility with industrial piping systems.

Working Principle

The inlet nozzle/flange operates by creating a sealed interface between the supply line and distribution header. Fluid enters through the nozzle bore, which is designed to minimize turbulence and pressure drop. The flange uses bolted connections with gaskets to maintain integrity under operational pressures and temperatures, while the nozzle geometry directs flow into the header chamber for even distribution to outlet ports.

Materials

Carbon steel (ASTM A105/A350 LF2), stainless steel (ASTM A182 F304/F316), alloy steel (ASTM A182 F11/F22), with PTFE or graphite gaskets. Pressure ratings: 150# to 2500# ANSI.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Bore Type	Full, Reduced
Face Type	RF, RTJ, FF
Nominal Size	DN50 to DN600
Surface Finish	Ra 3.2 μm to 6.3 μm
Pressure Rating	PN16 to PN400
Temperature Range	-29°C to 538°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, DIN 2633, EN 1092-1

Parent Products

This component is used in the following industrial products

Distribution Header

A component of an evaporator that evenly distributes the feed liquid or vapor to multiple tubes or channels.

View Product Details

Inlet Distributor

A component within a reformer reactor that evenly distributes the inlet gas mixture across the catalyst bed.

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Engineering Analysis

Risks & Mitigation

Gasket failure leading to leaks
Stress corrosion cracking in aggressive environments
Improper bolt torque causing joint failure
Erosion at nozzle throat from high-velocity fluids

FMEA Triads

Trigger: Improper gasket selection or installation
Failure: Fluid leakage at flange connection
Mitigation: Use compatible gasket materials, follow torque sequence and values, implement regular inspection protocols

Trigger: Thermal cycling stress
Failure: Fatigue cracking at nozzle-to-header weld
Mitigation: Design with proper reinforcement, use stress-relieved welds, implement thermal expansion compensation

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±1.5mm on flange dimensions, ±0.5° on bolt hole alignment, Ra 3.2-6.3μm surface finish

Test Method

Hydrostatic pressure test at 1.5x design pressure, helium leak test for critical services, liquid penetrant testing on welds

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

Manufacturers of Inlet Nozzle/Flange

Manufacturer profiles associated with Inlet Nozzle/Flange.

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Frequently Asked Questions

What is the difference between full bore and reduced bore inlet nozzles?

Full bore nozzles maintain the same internal diameter as the connecting pipeline, minimizing pressure drop. Reduced bore nozzles have a smaller internal diameter, used when flow control or pressure reduction is required at the header inlet.

How do I select the correct flange rating for an inlet nozzle?

Select flange rating based on maximum operating pressure and temperature, considering safety factors. Match to pipeline rating and consider corrosion allowance. Common ratings are 150#, 300#, 600#, 900#, 1500#, and 2500# ANSI classes.

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.

Inlet Nozzle/Flange