1-1/2 inch Black Iron Floor Flange

1-1/2" Black Malleable Iron Floor Flange – Threaded Fitting for Secure Pipe-to-Surface Anchoring

The 1-1/2" Black Malleable Iron Floor Flange is a threaded fitting designed to anchor vertical piping systems to structural surfaces. Commonly used in gas, air, steam, or non-potable water applications, this flange provides a rigid, flat-mount base with pre-drilled bolt holes for fastener installation.

Engineered for compatibility with Schedule 40 or Schedule 80 threaded pipe, it delivers a durable and reliable transition from pipe to floor or wall support in horizontal or vertical mounting configurations. Manufactured in compliance with dimensional and mechanical standards, it is suitable for both commercial and industrial system layouts.

Performance and Construction Attributes

• ✅ Material: Black malleable iron conforming to ASTM A197; designed for use in low to moderate pressure systems.
• ✅ Connection Type: Female NPT threads machined to ANSI/ASME B1.20.1 specifications for leak-resistant engagement.
• ✅ Bolt-Down Flange Face – Machined surface with mounting holes ensures stability when secured to concrete, wood, or steel substrates.
• ✅ Corrosion-Resistant Coating – Black finish enhances resistance to rust in dry, interior conditions (not recommended for potable water).
• ✅ Uniform Thread Engagement – Precision threading supports consistent torque and full-thread sealing performance.

Dimensional & Technical Specifications

• Nominal Size: 1-1/2"
• Material: Malleable Iron
• Thread Type: FNPT (Female National Pipe Thread)
• Mounting Holes: Typically 4, evenly spaced on flange face
• Standards: Complies with ANSI B16.3 and ASTM A197

Installation Notes

Install using pipe dope or thread sealant on male-threaded pipe for proper engagement. Secure the flange using fasteners appropriate to the substrate material. Torque fittings evenly to avoid flange deformation. This fitting is not pressure-rated for use in potable water supply lines or underground burial without corrosion protection.

Common Applications

Typically used in industrial piping systems, mechanical support frameworks, equipment base connections, and exposed gas lines. Also suitable for securing air or steam lines where rigid anchoring and dimensional stability are required.

Technical Insight

Floor flanges provide critical mechanical support by preventing pipe movement, distributing stress over a wider surface area, and ensuring that fittings maintain alignment under thermal or mechanical load.

The 1-1/2" Black Malleable Iron Floor Flange is a durable, code-conforming solution for pipe support at fixed anchor points. Specified for systems where structural stability and threaded alignment are required.