Galvanized Malleable Iron Reducing Socket China Suppliers and Factory

Leading China factory and suppliers of galvanized malleable iron reducing sockets. Available in 1/4-6 inch sizes with NPT, BSPT, and DIN threads. High-performance cast iron fittings in heavy or light types, available in galvanized or black finishes for industrial piping.


The Galvanized Malleable Iron Reducing Socket is a high-performance piping component engineered for connecting two pipes of different diameters traveling in the same direction. Designed for versatility and durability, these sockets feature Female National Pipe Taper (NPT) threads on both ends, ensuring a secure, leak-proof connection between male threaded pipes in diverse industrial environments.

Manufactured from premium black heart malleable iron and treated with a hot-dipped galvanized finish, these fittings offer exceptional tensile strength and superior resistance to corrosion. Whether your application involves water, oil, air, steam, or gas, our reducing sockets provide the structural integrity and reliability required for high-pressure industrial piping systems.

Detailed Parameters

MaterialBlack Heart Malleable IronStandardISO5922 / ANSI/ASME A197 / DIN1692
Size Range1/4” – 6” (per ISO49, ANSI/ASME B16.3)Thread TypeNPT / ISO7/1 / ANSI/ASME B1.20.1
Surface TreatmentHot Dipped Galvanized / BlackTensile Strength≥33kg/mm² (≥350MPa)
Working Pressure1.6MPA (16KG/CM²)Test Pressure2.5MPA (25KG/CM²)
Elongation≥8% to 10%Hardness<HB150

Key Advantages

Corrosion Resistance

The hot-dipped galvanized finish provides a robust barrier against rust and oxidation in air, steam, and water applications.

Extended Lifespan

High-grade malleable iron ensures superior durability and resistance to mechanical wear over long-term operation.

Tight Seal Integrity

NPT tapered threads create a tighter, more secure seal compared to straight threads, minimizing leakage risks.

Versatile Application

Ideal for a wide range of mediums including gas, oil, steam, and water across various industrial sectors.

Global Compliance

Fully certified by ISO9001, SGS, BV, and CCIC, meeting strict international quality and safety standards.

Flexible Sizing

Available in a comprehensive range from 1/8" to 6", catering to any specific piping configuration needs.

Product Gallery

Management Platforms

Quality Control

Strict adherence to ISO9001 and CIQ standards for zero-defect production.

Precision Engineering

Advanced molding processes ensuring exact dimensions per DIN and ASME standards.

Pressure Testing

Every batch undergoes a 2.5MPA test pressure check to ensure absolute safety.

Surface Inspection

Rigorous auditing of galvanized coatings to prevent premature corrosion.

Logistics Optimization

Professional export packaging with pallets and woven bags for secure transit.

Custom Design

Support for buyer's drawings and custom specifications for unique requirements.

Investment Return Comparison

FeatureStandard Iron FittingsOur Galvanized Malleable Fittings
Corrosion LifeShort (Rusts quickly)Long (High Zinc Coating)
Joint SecurityStandard SealHigh-Precision NPT Seal
MaintenanceFrequent ReplacementLow-Maintenance / Long-Term
Pressure LimitVariable/LowCertified 1.6MPA Working Pressure
Overall ROILow (Higher OPEX)High (Lower Lifecycle Cost)

Frequently Asked Questions

Q: What is the difference between black and galvanized malleable iron fittings?

Black fittings are uncoated and used primarily for gas or oil where corrosion is less of a concern. Galvanized fittings are coated in zinc to prevent rust, making them essential for water, steam, and outdoor applications.

Q: Which international standards do your reducing sockets comply with?

Our products are manufactured according to ISO5922, ANSI/ASME A197, and DIN1692, ensuring global compatibility and quality.

Q: Can these sockets be used for high-pressure steam lines?

Yes, with a working pressure of 1.6MPA and a test pressure of 2.5MPA, they are suitable for steam, air, gas, and oil piping systems.

Q: What thread types are available for the malleable iron pipe fittings?

We provide various thread options including NPT (American Standard), ISO7/1 (British/International), and DIN2999.

Q: Do you support custom designs or specific buyer drawings?

Yes, we welcome buyer's drawings or designs to provide customized fitting solutions tailored to your specific project requirements.

Q: What is the typical delivery lead time for bulk orders?

Normal delivery time is between 30 to 45 days after receiving the deposit, depending on the quantity and specifications of the order.

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