S-4139K368 4.026" ID x 4 1/2" OD x 12" Long FM Approved, UL Listed Standard-Wall Grooved-End Steel Pipe Nipples and Pipe

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-coated steel construction for extended service life in demanding industrial environments
• Reliable connection versatility with grooved end × NPT male design enabling quick installation and secure transitions between piping systems
• Superior structural integrity through welded construction that maintains pressure integrity and prevents joint failure
• Industry compliance assurance with FM Approved and UL Listed certifications for verified safety and performance standards
• Environmental regulation compliance meeting REACH and RoHS 3 requirements for safe use in regulated facilities
• Optimized airflow performance with 4" Schedule 40 dimensions maintaining consistent pressure and flow characteristics
• Reduced maintenance requirements with durable 12" length construction minimizing connection points and potential leak sources

Professional Applications & Engineering Value

This heavy-duty steel pipe adapter solves critical connection challenges in industrial air systems where reliability and compliance are paramount. The black-coated steel construction provides essential corrosion protection in humid or chemically active environments, while the welded design ensures leak-free performance under continuous operation. The innovative grooved end × NPT male configuration allows for efficient transitions between different piping systems, reducing installation time and eliminating the need for additional adapters. Engineered specifically for air system applications, this adapter maintains optimal flow characteristics with its precise 4" Schedule 40 dimensions, preventing pressure drops and ensuring consistent system performance. The combination of FM Approved and UL Listed certifications provides engineering teams with verified safety data for critical infrastructure projects.

Specification Summary & Compliance

This 4" Schedule 40 steel pipe adapter features precise dimensional specifications including 4.026" ID, 4 1/2" OD, and 0.237" wall thickness with threaded NPT male connections meeting standard pipe threading specifications. The product complies with FM Approved standards for fire protection systems and carries UL Listing for safety verification. Environmental compliance includes REACH (EC 1907/2006) adherence and RoHS 3 (2015/863/EU) conformity, ensuring regulatory acceptance across industrial applications. The straight configuration with threaded one-end design maintains proper alignment and connection integrity in piping systems.