Galvanized Malleable Iron Pipe Fitting Plugs China Factory and Suppliers

High-performance Galvanized Malleable Iron Pipe Fitting Plugs from a leading China factory. Hot Dipped Galvanized surface with BSPT and NPT threads. Certified by ISO, UL, FM, CE, TSE, and SGS. Trust the top suppliers for industrial durability.


Our Galvanized Malleable Iron Pipe Fitting Plugs are engineered for high-performance sealing and durability in demanding industrial piping systems. Manufactured from premium black heart malleable iron and finished with a robust hot-dipped galvanized coating, these plugs provide exceptional resistance to corrosion and oxidation, ensuring a secure, leak-proof termination for your pipelines.

Designed to meet stringent international standards including ISO5922, ANSI/ASME A197, and DIN1692, these fittings are ideal for transporting water, oil, air, steam, and gas. With a wide size range from 1/8" to 6" and precision threading, they offer seamless integration into diverse global infrastructure projects requiring maximum reliability and mechanical strength.

Detailed Parameters

MaterialBlack Heart Malleable IronStandardISO5922 / ANSI A197 / DIN1692
Size Range1/8” – 6” (per ISO49, ASME B16.3)Thread TypeISO7/1, ANSI B1.20.1, DIN2999
Tensile Strength≥33kg/mm² (≥350MPa)Elongation≥8% to 10%
Working Pressure1.6MPA (16KG/CM²)Test Pressure2.5MPA (25KG/CM²)
Surface FinishHot Dipped Galvanized / BlackHardness<HB150

Key Advantages

Anti-Corrosion Coating

Hot-dipped galvanization provides a thick zinc layer that prevents rust and extends service life in humid environments.

Long-Term Durability

High tensile strength and controlled hardness ensure the fittings withstand mechanical stress without cracking.

Global Standardization

Full compliance with British, American, and DIN standards for universal compatibility across global markets.

Versatile Application

Perfectly suited for diverse media including compressed air, steam, oil, gas, and water distribution lines.

Precision Threading

Accurate male and female threading ensures a tight, leak-free seal, reducing installation time and maintenance.

Certified Quality

Rigorous quality control certified by ISO9001, SGS, BV, and CCIC for absolute peace of mind.

Product Gallery

Management Platforms

Material Sourcing

Strict selection of Black Heart Malleable Iron to ensure superior structural integrity.

Precision Casting

Advanced molding processes ensuring dimensional accuracy according to ISO49 and DIN2950.

Pressure Testing

100% testing at 2.5MPA to guarantee zero leakage under maximum working conditions.

Surface Treatment

Automated hot-dip galvanizing lines for uniform coating thickness and maximum protection.

Quality Assurance

Third-party inspections via SGS and BV to validate chemical and physical properties.

Logistics Control

Export-grade packing with pallets and double-woven bags for safe global shipment.

Investment Return Comparison

FeatureStandard Malleable IronOur Galvanized PlugsPremium Benefit
Corrosion ResistanceModerateExcellentLower replacement cost
Leakage RiskStandardUltra-LowReduced downtime
Lifespan3-5 Years10+ YearsLong-term ROI
InstallationManual FitPrecision ThreadedFaster labor setup
ComplianceBasicISO/ANSI/DINGlobal market access

Frequently Asked Questions

Q: What are the main advantages of using galvanized malleable iron over black iron?

Galvanized fittings feature a zinc coating that provides superior protection against rust and corrosion, making them essential for outdoor or high-humidity environments where black iron would oxidize quickly.

Q: Which international standards do these pipe fittings comply with?

Our products are manufactured according to ISO5922, ANSI/ASME A197, and DIN1692 standards, ensuring they meet the technical requirements for global industrial applications.

Q: What is the maximum working pressure for the Malleable Iron Plug?

The rated working pressure is 1.6MPA (16KG/CM²), while the test pressure is conducted at 2.5MPA (25KG/CM²) to ensure safety and reliability under pressure.

Q: Can these fittings be used for gas and steam lines?

Yes, our malleable iron fittings are specifically designed for the transport of water, oil, air, steam, and gas, provided the pressure and temperature stay within the specified limits.

Q: What sizes are available for these galvanized plugs?

We offer a comprehensive range of sizes from 1/8" up to 6", following ISO49, ANSI/ASME B16.3, and DIN2950 dimensions to fit most industrial piping needs.

Q: What quality certifications do you provide?

Our manufacturing processes and products are certified by ISO9001, CIQ, ITS, SGS, BV, and CCIC, guaranteeing high material purity and dimensional precision.

Get a Professional Quote for Industrial Pipe Fittings Today!

Contact Us
Send a Message

If you are interested in our products, you can choose to leave your information here, and we will be in touch with you shortly.

  • *
  • *
  • *
  • *

If you are interested in our products, you can choose to leave your information here, and we will be in touch with you shortly.