Thread Fittings
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Thread Fittings

  • BSP Black Malleable Iron Hex Nipple Equal – Fig. 280, PN25, UL/FM Approved
    Brief:
    The BSP black hex nipple is a malleable iron threaded pipe fitting designed to connect two female-threaded pipes or fittings of the same nominal size. Featuring male threads on both ends and a hexagonal section in the middle, it allows easy installation and removal using standard wrenches.
    This fitting is widely used in water, oil, gas, and petrochemical piping systems, where reliable, high-strength threaded connections are required.
  • Black Pipe Fitting with M&F Socket for Fire Protection System
    Brief:
    An M&F socket (male × female socket) is a threaded malleable iron pipe fitting designed to connect a male-threaded pipe to a female-threaded pipe or component within a piping system. By combining internal and external threads in one fitting, it provides a compact and reliable connection solution. M&F sockets are widely used in water supply, fire protection, gas, HVAC, and general industrial piping systems.
  • Black Pipe Fitting with NPT Threads coupling for Fire Protection System
    Brief:
    The Socket Reducing Tee is a threaded malleable iron pipe fitting designed to connect pipes of different diameters. Available in galvanized and black finishes, it features strong corrosion resistance and is widely used in plumbing, fire protection systems, and industrial pipelines. With precision BSP/NPT threads, it ensures a reliable and leak-proof connection.
  • Connection Malleable Iron Threaded Socket Coupling Pipe Fitting Plumbing Materials in China
    Brief:
    A malleable iron threaded coupling is a pipe fitting designed to connect two pipes of the same nominal size in a threaded piping system. Featuring female threads on both ends, it ensures a secure, aligned, and leak-tight connection. Manufactured from high-quality malleable iron and produced to international standards, threaded couplings are widely used in water supply, fire protection, gas, HVAC, and general industrial piping systems for reliable and durable pipe connections.
  • Galvanized And Black Female Thread Socket Coupling
    Brief:
    A malleable iron threaded coupling is a pipe fitting designed to connect two pipes of the same nominal size in a threaded piping system. Featuring female threads on both ends, it ensures a secure, aligned, and leak-tight connection. Manufactured from high-quality malleable iron and produced to international standards, threaded couplings are widely used in water supply, fire protection, gas, HVAC, and general industrial piping systems for reliable and durable pipe connections.
  • Galvanized Union Connector | Malleable Iron Fitting for Water & Fire Systems
    Brief:
    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.
  • Tee Thread Fitting
    Brief:
    The tee in malleable cast iron pipe fittings is mainly used in pipeline systems to connect three pipelines. It is usually used to change the flow direction or diversion/convergence of fluids. It can distribute or merge fluids in a specific direction in the pipeline to ensure the efficient operation of the pipeline system. Tees are widely used in fire protection systems (such as the distribution of sprinkler pipe networks), industrial pipelines (such as the diversion of fluids such as petroleum and chemicals), building water supply and drainage systems (used to connect drainage pipes in different directions), HVAC systems (diversion of air or water flow), etc., especially in situations where fluids need to be guided to multiple directions. Malleable cast iron tees have become key components in pipeline systems in many industries due to their excellent corrosion resistance and high strength.
  • Galvanized BS/NPT Standard Female Thread Reducing Tee for Gas Fire Fighting System
    Brief:
    Our Tee Reducer Fittings are made from high-quality malleable iron and are available in both galvanized and black finishes. Designed to connect pipes of different sizes, they are ideal for use in fire protection systems, plumbing, and industrial pipelines. With threaded BSP or NPT connections and compliance with international standards, these fittings ensure durability, easy installation, and long-term performance under pressure.
  • Malleable Iron Tee Reducer (63mm To 3/4") Pipe Fittings
    Brief:
    Our Tee Reducer Fittings are made from high-quality malleable iron and are available in both galvanized and black finishes. Designed to connect pipes of different sizes, they are ideal for use in fire protection systems, plumbing, and industrial pipelines. With threaded BSP or NPT connections and compliance with international standards, these fittings ensure durability, easy installation, and long-term performance under pressure.
  • Galvanized Malleable Iron Reducing Tee 25×20×20
    Brief:
    Our Tee Reducer Fittings are made from high-quality malleable iron and are available in both galvanized and black finishes. Designed to connect pipes of different sizes, they are ideal for use in fire protection systems, plumbing, and industrial pipelines. With threaded BSP or NPT connections and compliance with international standards, these fittings ensure durability, easy installation, and long-term performance under pressure.
  • BMI Bushing Pipe Fitting with NPT Threads for Plumbing Systems
    Brief:
    Black iron pipe bushings are used to reduce pipe diameter in threaded piping systems.
    For example, when a DN20 pipe needs to be reduced to DN15, a pipe bushing allows the connection between different thread sizes.
    If the DN15 pipe has a male thread, it can be connected to the female-threaded side of the bushing.
    If the DN20 pipe is female-threaded, it connects to the male-threaded side of the bushing.
    In cases where both pipes have male threads, a female-threaded reducing bushing can be used as an intermediate connector.
    With standard threaded connections, pipe bushings enable easy and secure installation with water appliances, valves, meters, and other piping components.
    They are widely used in industrial, commercial, and residential piping systems to connect pipes with internal and external threads of different diameters, allowing efficient size conversion without changing the pipeline layout.

Malleable Iron Thread Fittings


Thread fittings are essential components used in piping systems to join pipes or tubes through threaded connections. These fittings come in various materials, including stainless steel, brass, and carbon steel. The key advantage of thread fittings is their ability to provide secure, leak-proof connections that can withstand high pressure. They are highly durable and resistant to corrosion, making them ideal for applications in water, gas, and oil pipelines. Thread fittings are commonly used in industries like oil and gas, HVAC, plumbing, and construction. Threaded connections are easy to install and offer excellent flexibility for maintenance and repairs.


While these components are available in many materials, we specialize in providing a premier selection of high-quality, durable malleable iron thread fittings engineered for superior reliability. Built on the promise of "Safer, No Leak!," our fittings embody all the key advantages of threaded connections while offering exceptional longevity, with a service life that can exceed 50 years with simple maintenance. Whether for industrial, commercial, or residential use, each thread fitting is crafted to meet the highest standards for a wide array of applications.


Uncompromising Quality and Technical Excellence

Our expertise is forged in precision engineering and an unwavering commitment to quality. Every threaded pipe fitting in our collection is a testament to superior manufacturing, giving you the confidence to build robust and dependable systems.


Built to International Standards

> Certified Materials: Our fittings are crafted from high-grade blackheart malleable cast iron, conforming to EN-GJMB-350-10 and ISO 5922 standards.

> Precision Engineering: Design and dimensions strictly adhere to international standards ISO 49 and EN 10242.

> Accurate Threading: We provide both BSPT (ISO 7-1 / EN 10226) and NPT (ASME B 1.20.1) thread connection types to meet diverse project requirements.


Superior Material and Manufacturing

> Exceptional Strength: Each fitting boasts a minimum tensile strength of 350 MPA and an elongation rate of 10%, ensuring it can withstand demanding operational pressures.

> Advanced Corrosion Resistance: A hot-dip galvanized zinc coating with an average thickness of 70μm provides robust protection against rust and corrosion, ensuring long-term durability.

> Rigorous Quality Control: To guarantee our "Safer, No Leak!" promise, every single fitting undergoes a stringent 0.6 MPa air pressure test before packaging to ensure a perfect seal.


Designed for a Multitude of Applications

Our deep experience in the industry allows us to offer versatile and practical solutions that professionals rely on every day. Our fittings are designed not only to perform but to simplify installation and adapt to a vast range of environments.


A Comprehensive Range for Every Need

We offer an extensive catalog of thread pipe fitting types to ensure you can find the perfect component for any configuration, including:

> Elbows (90°, 45°, M&F, Reducing)

> Tees (Equal, Reducing, Y-Branch)

> Sockets & Couplings (Equal, Reducing)

> Nipples (Hexagon, Reducing)

> Unions (Flat Seat, Taper Seat, M&F)

> Reducers, Bushings, Plugs, and Caps

> Flanges (Round, with and without bolt holes)


Versatile Application Across Industries

Jianzhi threaded fittings are trusted across numerous sectors for their proven performance and reliability. Key applications include:

> Gas Pipelines

> Fire Protection Systems & Fire Pipes

> Water Supply & Treatment Systems

> Heating and HVAC Systems

> Oil Pipelines


Benefits for the Professional

> Easy Installation: Our high-precision threads exceed BS standards by 40%, making installation easier for workers and saving valuable time and labor costs.


> Guaranteed Performance: Our fittings are rated for a maximum working pressure of 363 PSI (2.5 MPa) within a temperature range of -20°C to 120°C, providing a wide operational margin for your systems.


The Jianzhi Guarantee: A Legacy of Trust

When you choose our fittings, you are choosing a brand built on decades of expertise, certified quality, and proven results. We provide the trustworthiness you need to build with absolute confidence.


A Legacy of Manufacturing Excellence

As a leading manufacturer of cast iron pipe fittings since 1982, we have built a global reputation for quality. Our operations are supported by over 4,500 employees and 350 technical engineers, with a distribution network that spans more than 100 countries.


Certified Quality You Can Trust

Our commitment to quality is validated by the world's most recognized certification bodies. Our products and processes are certified to meet the following standards:

> ISO 9001, ISO 14001, & ISO 18000

> UL Listed

> FM Approved

> CE Certified


Proven in Landmark Projects

Our fittings are trusted for use in some of the world's most demanding and high-profile construction projects, demonstrating their reliability in critical applications. Notable projects include:

> Beijing Daxing International Airport

> National Stadium (Bird's Nest)

> Shanghai World Financial Center

> Canton Tower


Build with Confidence

Choose durability, safety, and performance backed by over 40 years of manufacturing expertise. Our malleable iron thread fittings provide the strength and reliability required for your most critical projects. Explore our extensive selection of threaded fittings below and build your next piping system with the confidence that comes from using a trusted industry leader.

Inquiry

Telephone

+86-130-1137-4563

Sales Phone

+86-188-3320-7623

WhatsApp

+8613011374563

Email

inquiry@maitoleadfitting.com

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