1 inch x 48 inch Black Steel Nipple

1" x 48" Black Steel Nipple – Threaded Schedule 40 Pipe for Gas and Mechanical Systems

The 1" x 48" Black Steel Nipple is a threaded Schedule 40 pipe segment fabricated from welded carbon steel, used primarily in gas distribution, hydronic heating, and low-pressure mechanical systems. The nipple is cut to length and externally threaded on both ends to ensure direct compatibility with standard 1" NPT fittings and valves.

Manufactured to ASTM specifications, this fitting is suitable for use in commercial, industrial, and residential environments where rigidity, pressure tolerance, and compatibility with black malleable iron and steel fittings are required.

Performance Characteristics

• ✅ Material – Constructed from carbon steel with black oxide finish for internal system use in non-corrosive environments.
• ✅ Length – 48" nominal length, suitable for spanning extended piping runs or creating custom line segments.
• ✅ Threading – NPT tapered threads meet ANSI/ASME B1.20.1 specifications for pressure-rated mechanical seals when paired with approved sealants.
• ✅ Pipe Standard – Conforms to Schedule 40 wall thickness (ASTM A53/A106 Grade B), offering strength and flow capacity for fluid and gas transfer.
• ✅ Fabrication Method – Typically machine-cut and threaded; beveled thread ends allow for rapid and repeatable connections with minimal rework.

Specifications

• Nominal Pipe Size: 1"
• Overall Length: 48"
• Material: Welded or seamless carbon steel
• Finish: Black (uncoated)
• Thread Type: NPT (National Pipe Thread), male both ends
• Wall Thickness: Schedule 40
• Standards: ASTM A733 (cut pipe nipples), ASTM A53 or A106 for base pipe

Typical Applications

Used in natural gas and propane distribution, low-pressure steam, compressed air systems, water heater manifold connections, and mechanical infrastructure requiring threaded pipe sections. Suitable for interior installations where corrosion protection is not required by code.

Material Considerations

Black steel is not galvanized and is intended for applications where rust resistance is not a primary concern. For corrosive or outdoor environments, use galvanized or stainless alternatives unless additional protective coatings are applied.

Installation Guidelines

Use PTFE tape or pipe joint compound on male threads to ensure leak-tight seals. Apply torque using standard pipe wrenches, ensuring not to damage threads. Always follow applicable building and mechanical codes regarding pipe support spacing and pressure testing procedures post-installation.