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Malleable Plug Fittings

🔹Malleable Plug Fittings

Product Overview

Malleable Plugs are threaded fittings designed to seal or block internal threads in pipelines, valves, and equipment ports. They provide secure, leak-free closure and protect piping systems from contamination, pressure loss, and mechanical damage.

Manufactured from high-quality malleable iron and produced in accordance with EN 10242, ISO 49, ASTM A197, BS 143 / 1256, and GOST standards, these plugs combine durability, ductility, and corrosion resistance for long-term performance in industrial pipelines.

Available in Hex Head, Square Head, and Round (Flush) designs, Malleable Plugs suit a wide range of applications and installation conditions.

Key Features & Advantages

Reliable Leak-Free Sealing

Precision-machined threads provide tight engagement with internal threads, ensuring secure and leak-proof closure.

High Mechanical Strength

Forged malleable iron construction resists internal pressure, vibration, and mechanical stress, guaranteeing long-term reliability.

Multiple Head Designs

  • Hex Head – easy installation and removal with standard wrenches

  • Square Head – traditional heavy-duty design

  • Round / Flush Plug – compact design for space-constrained installations

Versatile Application

Suitable for horizontal and vertical pipelines, maintenance shutdowns, system testing, and reserved outlet points.

Corrosion Resistance

Available in black, galvanized, or zinc-plated finishes to enhance durability in indoor and outdoor environments.

Materials & Manufacturing

  • Malleable Iron (ASTM A197 / EN 10242)

  • Forged or cast with heat treatment for superior ductility

  • CNC thread machining for precise fit

  • Dimensional inspection and quality control to ensure seal integrity

Certificates available upon request (EN 10204 3.1) and third-party inspection (SGS / BV / TUV) is available.

Standards & Threads

Manufactured according to:

  • EN 10242 / ISO 49 – Malleable iron threaded fittings

  • ASTM A197 / BS 143 / 1256 – Material and mechanical standards

  • GOST 8948 / 6357 – Russian standards

Thread types:

  • NPT

  • BSP / BSPT

  • Metric (custom sizes available)

Applications

Malleable Plugs are widely used in:

  • Water supply and plumbing systems

  • Gas and fuel pipelines

  • Fire protection and sprinkler systems

  • Compressed air systems

  • HVAC and industrial piping

  • Chemical and petrochemical plants

They are particularly suitable for:

  • Sealing unused outlets or ports

  • Pressure testing and system isolation

  • Temporary or modular pipeline closures

  • Maintenance or retrofit projects

Delivery & Customization

  • Standard sizes in stock for fast delivery

  • Custom head types, thread sizes, and lengths available

  • OEM marking and private label packaging

  • Export-standard packaging for safe transportation

Technical support is available for proper product selection and installation guidance.

Why Choose Our Malleable Plug Fittings

  • Compliance with international standards

  • Reliable leak-free performance

  • High mechanical strength and durability

  • Flexible installation for various piping layouts

  • Competitive pricing and global shipping experience

Request a Quote

For high-quality Malleable Plug fittings, please provide your required size, material grade, pressure rating, and thread type.
Our technical team will provide professional advice and fast quotation.