S-4187N12 1.38" ID x 1 21/32" OD x 3" Long ASTM A733, ASME B1.20.1, ISO 7.1 Standard-Wall Stainless Steel Threaded Pipe Nipples and Pipe

Key Features & Benefits at a Glance

• Superior corrosion resistance with 304/304L stainless steel construction, ensuring long-term reliability in demanding environments with air, natural gas, oil, steam, and water.
• Seamless dual-thread compatibility featuring BSPT × NPT threading on both ends, enabling versatile connections across international piping systems without adapters.
• Robust welded construction that enhances structural integrity and leak resistance under continuous pressure in Class 150 applications.
• Precision dimensional accuracy with Schedule 40 standard-wall thickness, providing optimal flow capacity (1.38" ID) and durability for industrial fluid handling.
• Comprehensive standards compliance including ASTM A733, ASME B1.20.1, and ISO 7.1, guaranteeing interchangeability and safety in global engineering projects.
• Environmental regulation adherence with RoHS 3 compliance, ensuring safe use in regulated industries without hazardous substance concerns.
• Time-saving installation due to the straight, 3-inch male-threaded design, simplifying assembly in tight spaces for maintenance and new builds.

Professional Applications & Engineering Value

This stainless steel threaded pipe nipple solves critical challenges in industrial fluid systems by combining 304/304L stainless steel's resistance to oxidation and chemical attack with dual BSPT × NPT threading for universal fitting compatibility. Engineers value its ability to prevent leaks in steam, oil, and gas applications where thermal cycling and pressure fluctuations are common. The welded construction and precise threading per ASME B1.20.1 minimize failure risks, while the standard-wall design balances strength with efficient flow rates. Ideal for connecting pumps, valves, and pipelines in HVAC, petrochemical, and water treatment plants, it reduces downtime by ensuring reliable performance under Class 150 pressure ratings.

Specification Summary & Compliance

This pipe nipple adheres to ASTM A733 for welded and seamless pipe dimensions, with threading conforming to ASME B1.20.1 (NPT) and ISO 7.1 (BSPT) standards for precise Class 2A/ISO tolerance fits. It is manufactured for use with Schedule 40 pipes, featuring a 1.38" ID, 1 21/32" OD, and 0.14" wall thickness. The product is fully RoHS 3 (2015/863/EU) compliant, meeting environmental safety requirements for hazardous substance restrictions.