Midland Industries 59121SMLS Pipe Nipple 1-1/4in Sch 80

Product Description

The MIDLAND INDUSTRIES 59121SMLS is a seamless black steel pipe nipple rated for Schedule 80 service. It features male pipe thread (MPT) connections on both ends, sized at 1-1/4 inches, with a total face-to-face length of 2 inches and a wall thickness of 0.191 inches. The part is manufactured to ANSI B1.20.1 dimensional standards, carrying a 300 lb pressure class rating and a maximum working pressure of 1,900 psi. Seamless construction eliminates a weld seam, improving strength and pressure integrity in high-demand installations. Licensed plumbers and pipefitters use this nipple to make short close connections in black iron piping systems.

This nipple is suited for residential and commercial piping applications where Schedule 80 wall thickness is required for elevated pressure or mechanical strength. Common install scenarios include natural gas distribution, steam, and compressed air lines. The black finish is standard for gas service piping and is compatible with threaded black iron fitting systems. The rated temperature range runs from -200 degrees F to 150 degrees F, making it appropriate for a broad range of service conditions.

Key Features

• Seamless construction for higher pressure integrity compared to welded alternatives
• Schedule 80 wall thickness rated to 1,900 psi working pressure
• 1-1/4 in MPT x 1-1/4 in MPT with ANSI B1.20.1 thread standard (1-1/4-11-1/2 thread form)
• Thread engagement length of 1.01 inches per end
• 300 lb pressure class rating
• Temperature range: -200 degrees F to 150 degrees F

Compatibility

Designed as an OEM-style replacement or direct-fit component for threaded black iron piping systems using 1-1/4 inch Schedule 80 fittings and pipe.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the International Plumbing Code (IPC) or International Fuel Gas Code (IFGC) where gas service applies. Shut off and depressurize the line before threading or removing any fitting. Apply an approved thread sealant or PTFE tape to male threads before makeup. Do not over-tighten; use a pipe wrench with a backup wrench on adjoining fittings to avoid stressing connected components.