Gas Inlet Manifold for Gas Purging Stations | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Gas Inlet Manifold

Definition

The Gas Inlet Manifold is a critical component of a Gas Purging Station, serving as the primary entry and distribution point for the purge gas. It receives gas from the main supply line and evenly distributes it to multiple outlet ports, ensuring consistent flow and pressure to various sections or tools within the purging system. Its design is crucial for maintaining system efficiency and safety during purging operations. The manifold is typically constructed from materials such as stainless steel (e.g., 304, 316), carbon steel, or brass, depending on the application requirements. Key parameters include an operating pressure range of 1.0–1.6 MPa (with a note that), inlet connection sizes from DN50 to DN200 (flange type per customer request, per DIN EN 1092-1), and a customizable number of outlets ranging from 2 to 8. Outlet connection sizes range from DN15 to DN80, with threaded or flanged options per DIN EN 1092-1. Flow capacity is 100–1000 Nm³/h based on air at 1.0 MPa inlet. Material options include 316L (optional 304 or duplex) per ASTM A240. Surface finish can be electropolished to Ra ≤ 0.8 μm per ISO 4287 for clean gas applications. Operating temperature range is -40–85°C for non-freezing media. Leakage rate is ≤ 0.1 mL/min at 1.1 × rated pressure. Weight ranges from 15–120 kg depending on size and outlets. These values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. The manifold's design ensures balanced pressure distribution and minimizes pressure drops across the system, contributing to efficient and safe purging operations.

Working Principle

The manifold operates by receiving pressurized gas through a single inlet port. Internal channels or chambers within the manifold body divide and direct the gas flow to multiple outlet ports. Valves or regulators may be integrated to control the flow to individual outlets. The design ensures balanced pressure distribution and minimizes pressure drops across the system. The operating pressure range is 1.0–1.6 MPa, with a note that The number of outlets can be customized from 2 to 8, and outlet connection sizes range from DN15 to DN80 with threaded or flanged options. Flow capacity is 100–1000 Nm³/h based on air at 1.0 MPa inlet. The manifold is available in materials such as 316L (optional 304 or duplex) per ASTM A240, and surface finish can be electropolished to Ra ≤ 0.8 μm per ISO 4287. Operating temperature range is -40–85°C for non-freezing media. Leakage rate is ≤ 0.1 mL/min at 1.1 × rated pressure. These parameters are reference ranges and must be confirmed for the specific application.

Common Materials

Stainless Steel (e.g., 304, 316), Carbon Steel, Brass

Technical Parameters

Parameter	Typical range	Notes & selection driver
Operating Pressure	1.0–1.6 MPa
Inlet Connection Size	DN50–DN200 mm	Flange type per customer requestDIN EN 1092-1
Number of Outlets	2–8	Customizable manifold configuration
Outlet Connection Size	DN15–DN80 mm	Threaded or flanged optionsDIN EN 1092-1
Flow Capacity	100–1000 Nm³/h	Based on air at 1.0 MPa inlet
Material	316L	Optional 304 or duplexASTM A240
Surface Finish	Ra ≤ 0.8 μm	Electropolished for clean gasISO 4287
Operating Temperature	-40–85 °C	Non-freezing media
Leakage Rate	≤ 0.1 mL/min	At 1.1 × rated pressure
Weight	15–120 kg	Depends on size and outlets

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

Components / BOM

Manifold Body
The main structural block containing internal flow channels that distribute the gas.

Material: Stainless Steel
Inlet Port Fitting Part
Connection point for the main gas supply line to enter the manifold.

Material: Brass or Steel
Outlet Port Fittings
Multiple connection points where gas is distributed to downstream lines or tools.

Material: Brass or Steel
Pressure Gauge Port (Optional) Optional Part
A dedicated port for installing a pressure gauge to monitor inlet pressure.

Material: Steel

Application & selection

Application Fit & Sizing Matrix

Operational Limits

pressure:	Up to 300 psi (20.7 bar)
flow rate:	0.5 to 500 SCFM
temperature:	-40°C to 150°C
slurry concentration:	Not applicable - designed for clean gas only

Media Compatibility

✓ Natural gas distribution ✓ Industrial nitrogen purging ✓ Compressed air systems

Unsuitable: Corrosive gases (e.g., chlorine, hydrogen sulfide) without special coatings

Sizing Data Required

Maximum system pressure (psi/bar)
Total required flow rate (SCFM/Nm³/h)
Number of outlet connections required

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Corrosion fatigue cracking

Cause: Cyclic thermal and pressure stresses combined with corrosive gas components (e.g., H2S, CO2, moisture) leading to crack initiation and propagation at stress concentration points like welds or bends.

Erosion-corrosion

Cause: High-velocity particulate-laden gas flow causing mechanical wear (erosion) that removes protective oxide layers, accelerating chemical attack (corrosion) on internal surfaces, especially at directional changes.

Maintenance Indicators

Audible high-frequency whistling or hissing indicating gas leakage through cracks or compromised seals
Visual external discoloration (e.g., blueing or rust streaks) at welds or fittings suggesting internal corrosion or overheating

Engineering Tips

Implement regular ultrasonic thickness testing and phased array ultrasonic testing at high-stress areas to monitor wall thinning and crack development before failure occurs.
Install properly sized inlet filters/separators and consider internal coatings (e.g., thermally sprayed aluminum or ceramic) to protect against erosion-corrosion in high-velocity sections.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards

ISO 15649:2001 (Petroleum and natural gas industries - Piping) ASME B31.3:2022 (Process Piping)

Quoted from the published standard.

Manufacturing Precision

Bore diameter: +/-0.05mm
Flange flatness: 0.1mm per 300mm diameter

Quality Inspection

Hydrostatic pressure test (1.5x design pressure)
Dye penetrant inspection (weld seams and critical joints)

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

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Inspection readiness

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

Supplier transparency

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Manufacturers of Gas Inlet Manifold

Manufacturer profiles associated with Gas Inlet Manifold.

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Frequently Asked Questions

What is the operating pressure range for this manifold?

The reference operating pressure range is 1.0–1.6 MPa. Always verify the exact pressure rating for your specific model with the manufacturer.

How many outlets can the manifold have?

The number of outlets is customizable from 2 to 8, depending on the manifold configuration. Confirm the required number of outlets with the supplier for your application.

What materials are available for the manifold?

Materials on file include stainless steel (e.g., 304, 316), carbon steel, and brass. Additionally, a material option of 316L is listed, with optional 304 or duplex, per ASTM A240. Verify material suitability for your process conditions.

What is the leakage rate specification?

The leakage rate is ≤ 0.1 mL/min at 1.1 × rated pressure. This is a reference value; confirm the leakage performance for your specific manifold model.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Gas Purging Station

View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems

Downstream Applications

Specialized Tooling

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 12 October 2026

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