3 inch Galvanized Iron Cap

3" Galvanized Iron Threaded Cap – Engineered for Secure System Termination

The 3" Galvanized Iron Threaded Cap is a robust fitting designed to seal the end of a male-threaded pipe in pressurized or non-pressurized systems. Used across gas, air, and water lines, this cap delivers dependable closure while protecting the system from debris, pressure loss, and contamination.

Key Performance Features

• Corrosion Resistance: Hot-dipped galvanized finish resists oxidation and atmospheric exposure, ideal for both indoor and outdoor use.
• Thread Integrity: Manufactured to ASME B1.20.1 standards for NPT threads, ensuring a tight seal and consistent engagement on steel pipe.
• Load-Bearing Strength: ASTM A197 malleable iron base material offers high tensile strength and impact durability.
• System Versatility: Suitable for low-pressure steam, water, oil, and air service in residential, commercial, and light industrial piping.

Technical Specifications

• Material: Galvanized Malleable Iron (ASTM A197)
• Nominal Size: 3 inch
• Connection: Female NPT (Threaded)
• Finish: Hot-dipped galvanized coating
• Standards: ASME B16.3, UL/FM/NSF listings vary by application

Installation Guidance

Threaded caps should be applied to clean, undamaged male pipe threads using an appropriate thread sealant or PTFE tape to ensure leak-tight performance. Over-tightening can damage threads or compromise the cap’s sealing capacity. For pressurized systems, final tightening should be completed with a calibrated torque wrench as specified by the system designer or local code.

Common Applications

This 3" galvanized cap is frequently deployed in:

• Isolating unused branches of piping in gas or water distribution networks
• Temporary or permanent pipe system terminations
• Maintenance shutdowns where protection from contamination is critical
• Pressure test points or future expansion outlets

Did You Know?

Galvanized iron is often selected in environments where a balance of affordability and corrosion protection is necessary, particularly in exposed or humid areas where raw steel fittings would degrade rapidly.

The 3" Galvanized Iron Cap provides a professional-grade solution for terminating pipe runs with strength and reliability. Whether sealing off unused ports or capping future expansion branches, this fitting delivers performance contractors can count on.