Branch Connections for Industrial Gas Systems

Product Specifications

Technical details and manufacturing context for Branch Connections

Definition

Branch connections are specialized pipe fittings designed to create secure, leak-proof junctions where secondary gas lines connect to the main gas inlet bustle. They facilitate the distribution of gas from the primary bustle to various process points, ensuring proper flow control and system integrity in industrial gas delivery systems. These components are typically manufactured from carbon steel or stainless steel, with material grades such as ASTM A105 for carbon steel, which is suitable for high-temperature applications. The nominal diameter ranges from DN15 to DN300, matching the main pipe size, and wall thickness varies from 2.0 to 12.7 mm depending on pressure rating. Operating pressure is specified between 1.0 and 1.6 MPa. Operating temperature ranges from -40°C to 85°C, limited by seal integrity. End connections can be butt weld, socket weld, or threaded, per ASME B16.25. Surface treatment may include galvanizing per ASTM A153 for corrosion protection. Tolerances are ±0.05 mm per ISO 2768-m, and weight ranges from 0.5 to 15 kg. Leakage rate is specified as 0.01 ml/min, indicating a Class A seal. These parameters are directory reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. Standards listed are procurement references, not certifications of compliance. Branch connections are critical for maintaining pressure integrity and controlled gas flow in industrial gas delivery systems.

Working Principle

Branch connections create a sealed junction between the main bustle pipe and secondary lines using mechanical connections such as flanges, welds, or threaded joints. These connections maintain pressure integrity while allowing controlled gas flow from the primary to secondary systems. The design ensures that the junction can withstand operating pressures up to 1.6 MPa and temperatures from -40°C to 85°C, with a leakage rate of 0.01 ml/min. Proper installation and selection of end connections (butt weld, socket weld, or threaded) are essential to achieve the required seal. The operating pressure must be above 1.0 MPa. Regular inspection for leaks and corrosion is necessary to maintain system integrity.

Common Materials

Carbon Steel, Stainless Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	DN15–DN300 mm	Matches main pipe sizeISO 6708
Wall Thickness	2.0–12.7 mm	Pressure rating dependentISO 4200
Operating Pressure	1.0–1.6 MPa
Operating Temperature	-40–85 °C	Seal integrity limits
Material Grade	ASTM A105	Carbon steel for high tempASTM A105
End Connection	BW/SW/THD	Butt weld, socket weld, threadedASME B16.25
Surface Treatment	Galvanized	Corrosion protectionASTM A153
Tolerance	±0.05 mm	Precision fitISO 2768-m
Weight	0.5–15 kg	Handling and support
Leakage Rate	0.01 ml/min	Class A seal

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

Main Run Section Part
Primary pipe section that carries gas flow through the bustle

Material: steel
Branch Outlet
Secondary connection point for attaching branch lines

Material: steel
Reinforcement Pad Part
Additional material to strengthen the branch connection area

Material: steel

Applied To / Applications

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

Gas Inlet Bustle

View system integration details

Manufacturers of Branch Connections

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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 6 September 2026

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Frequently Asked Questions

What materials are branch connections available in?

Branch connections are typically made from carbon steel or stainless steel. The material grade for carbon steel is ASTM A105, which is suitable for high-temperature applications. Always verify the specific material grade with the manufacturer for your application.

What is the operating pressure range for branch connections?

The operating pressure range is 1.0 to 1.6 MPa. Confirm the exact pressure rating for your system with the supplier.

What end connection types are available?

End connections can be butt weld (BW), socket weld (SW), or threaded (THD), per ASME B16.25. The choice depends on the piping system design and installation requirements. Verify compatibility with your system.

What is the leakage rate for branch connections?

The leakage rate is specified as 0.01 ml/min, indicating a Class A seal. This is a reference value; actual performance should be verified with the manufacturer for the specific model.

Data Basis

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

Preliminary Technical Classification

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pressure:	Up to 1500 psi (10.3 MPa)
flow rate:	Dependent on branch/main diameter ratio, typically up to 5000 GPM for standard sizes
temperature:	-40°C to 150°C
slurry concentration:	Up to 40% solids by weight for abrasion-resistant materials

Branch Connections

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards