Galvanized Union Connector | Malleable Iron Fitting for Water & Fire Systems

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Galvanized Union Connector | Malleable Iron Fitting for Water & Fire Systems

Union in malleable cast iron is a fitting used to connect two sections of pipes, which is easy to disassemble and repair. It uses threaded connection to ensure the firm connection of pipes and provide effective sealing to prevent leakage. Due to its quick connection and disassembly characteristics, Union is widely used in pipe systems that require regular maintenance and inspection, especially in fire protection systems, construction engineering, petrochemicals, HVAC and other fields, to ensure the safety and reliability of pipe systems.

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Product Description

Brief Introduction

The Galvanized Union Connector is a versatile and essential pipe fitting designed for secure, easy-to-maintain connections in a wide range of piping systems. Made from high-quality malleable iron, this connector features a threaded design that allows for quick disassembly and reassembly, making it ideal for systems that require regular maintenance, inspections, or repairs. The galvanized surface treatment provides exceptional corrosion resistance, protecting the connector from moisture, chemicals, and harsh environmental conditions. As a key component in fire protection systems, industrial pipelines, and building water supply networks, the Galvanized Union Connector ensures a leak-proof seal through precision threading and durable gaskets. Its compliance with international standards (ISO 5922, ANSI/ASME B16.3) and certifications like UL, FM, and CE confirms its reliability and safety, making it a trusted choice for engineers, contractors, and facility managers worldwide.

Product Features

Threaded Secure Connection

The Galvanized Union Connector uses precision threading (compatible with ASME B1.20.1, ISO 7-1, NPT, etc.) to create a tight, leak-proof seal between pipes. The threaded design ensures a firm connection that resists pressure fluctuations and prevents fluid or gas leakage, critical for applications like fire protection and industrial fluid transport.

Easy Disassembly for Maintenance

Unlike permanent pipe connections, the union design allows for quick disassembly without cutting or damaging pipes. This feature is invaluable for systems that require regular maintenance, inspections, or part replacements, such as water treatment facilities, HVAC systems, and industrial pipelines, saving time and labor costs.

Corrosion-Resistant Galvanized Surface

The connector’s galvanized finish—applied via hot-dip galvanizing or electro-galvanizing—provides a protective layer that resists corrosion, rust, and degradation. This makes it suitable for outdoor use, municipal pipelines, and systems handling corrosive media like seawater, chemicals, or wastewater.

High-Strength Malleable Iron Construction

Crafted from malleable iron, the Galvanized Union Connector offers exceptional strength, durability, and impact resistance. Malleable iron’s ductility allows it to withstand heavy loads and temperature fluctuations, making the connector suitable for high-pressure systems (up to PN25) and high-temperature applications (up to 200°C).

Size	1/8''-6''
Material	malleable iron
Standard	ISO 5922/ISO 049/ISO 7-1，ISO 228	EN 1562:1997/EN 10242:2003	DIN 2950/1692/2999	ANSI/ASTM A197/A197M ANSI/ASME B16.3, B16.14, B16.39
Certifacate	FM/UL/CE/ABNT/SNI/SIRM/TSE/ISI
Surface Treatment	Nature Black
	Hot Dip Galvanized
	Eletro Galvanized
Work Pressures	PN25/2.5Mpa/363PSI/class150/25bar
Max Temperature	200°C (392°F)
Tensile Strength	≥350MPA
Elongation	≥10%
Hardness	≤HB150

Product Uses

Fire Protection Systems

In fire protection systems, the Galvanized Union Connector is used to connect sprinkler pipes, fire hoses, and main water lines. Its leak-proof seal ensures uninterrupted water flow during emergencies, while its easy disassembly allows for quick maintenance and repairs. It meets UL and FM standards, ensuring compliance with fire safety regulations.

Industrial Pipelines

Industrial facilities, including oil refineries, chemical plants, and manufacturing plants, rely on the Galvanized Union Connector for connecting pipes that transport oils, chemicals, gases, and other industrial fluids. Its corrosion resistance and high-pressure tolerance make it suitable for harsh industrial environments, while its easy maintenance reduces downtime.

Building Water Supply & Drainage

For residential and commercial buildings, the Galvanized Union Connector connects water supply lines, drainage pipes, and HVAC fluid lines. Its leak-proof design prevents water damage, and its easy disassembly simplifies repairs or upgrades to plumbing systems, such as replacing water heaters or modifying drainage routes.

Municipal & Agricultural Systems

Municipal water supply, drainage, and wastewater treatment systems use the Galvanized Union Connector for its corrosion resistance and durability. It is also ideal for agricultural irrigation systems, connecting irrigation pipes to ensure even water distribution across farmland. Its ability to withstand outdoor conditions and frequent use makes it a reliable choice for these applications.