3/4 inch x 5-1/2 inch Black Steel Nipple

3/4" x 5-1/2" Black Steel Pipe Nipple – Threaded Both Ends

The 3/4" x 5-1/2" Black Steel Pipe Nipple is manufactured for use in systems requiring durable, pressure-rated connections. Constructed from welded black steel conforming to ASTM A53 standards, this schedule 40 nipple is designed for general-purpose steam, water, air, and gas distribution lines in industrial and commercial applications.

This fitting features tapered National Pipe Thread (NPT) on both ends to ensure a tight, mechanical seal when used with compatible threaded components. It is commonly employed where corrosion protection from painting or coating is expected, as black steel is not galvanized.

Key Product Details

• Size: 3/4 inch nominal pipe size x 5-1/2 inch length
• Material: Welded black steel pipe (ASTM A53)
• Schedule: Schedule 40 wall thickness
• Ends: NPT threads, both ends
• Pressure Rating: Suitable for standard pressure applications (based on schedule and pipe size)
• Application: Non-potable systems including air, gas, steam, and oil lines

Typical Applications

Black steel nipples are used extensively in natural gas distribution, low-pressure steam systems, fire protection loops (when permitted by code), and closed-loop hydronic heating systems. They are not approved for use in potable water systems due to the lack of corrosion-resistant internal coating.

Installation Notes

Install using appropriate thread sealant or PTFE tape. Tighten joints using standard pipe wrenches, applying torque per thread engagement guidelines. Avoid overtightening to prevent thread deformation. Do not use in corrosive or high-humidity environments without proper external protection.

Compliance and Standards

• ASME B1.20.1 – NPT thread specification
• ASTM A53 Type E or S, Grade B (pipe specification)

The 3/4" x 5-1/2" Black Steel Nipple provides dependable performance in structural and fluid conveyance systems. Designed for integration into threaded piping layouts, it offers the durability required in high-demand service conditions.