S-4139K366 3.068" ID x 3 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
• Superior connection versatility through grooved end × NPT male design enabling quick installation and secure piping transitions
• Rigorous safety compliance with FM Approval and UL Listing ensuring reliable performance in critical air system applications
• Optimized dimensional accuracy with Schedule 40 specifications maintaining consistent flow characteristics and pressure integrity
• Robust welded construction providing exceptional structural strength and leak-free operation under continuous use
• Environmental regulation adherence through REACH and RoHS 3 compliance for responsible manufacturing standards
• Precision-engineered threading on one end ensuring secure NPT connections without cross-threading risks

Professional Applications & Engineering Value

This heavy-duty 3" Schedule 40 black-coated steel pipe adapter delivers critical engineering solutions for industrial air systems requiring reliable transition between grooved end and NPT male connections. The welded construction combined with corrosion-resistant coating addresses common failure points in pneumatic applications, preventing leaks and maintaining system pressure integrity. Engineered specifically for air system performance, the adapter's precise grooved end design facilitates rapid installation while the NPT threaded end ensures secure sealing in high-vibration environments. The 12" length provides optimal spacing flexibility for complex piping layouts, making it ideal for HVAC, compressed air systems, and industrial processing applications where durability and regulatory compliance are paramount.

Specification Summary & Compliance

Manufactured to Schedule 40 specifications with precise 3.068" ID and 3 1/2" OD dimensions ensuring proper flow characteristics. Features threaded NPT male end with standard pipe threading specifications and grooved end connection designed for compatible coupling systems. Compliant with FM Approved and UL Listed standards for safety performance, along with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations. The 0.216" wall thickness and straight shape maintain structural integrity under operating pressures.