Midland Industries 59122SMLS Seamless Pipe Nipple 1-1/4 in

Product Description

The MIDLAND INDUSTRIES 59122SMLS is a seamless black steel pipe nipple rated for 300 lb pressure service. It features male pipe thread (MPT) on both ends at 1-1/4 inches, with an overall length of 2.5 inches and a 1-1/4-11-1/2 thread form per ANSI B1.20.1. Wall thickness is 0.191 inches at Schedule 80, giving it a 1,900 psi working pressure rating. Licensed plumbers, pipefitters, and mechanical contractors install this fitting in gas, steam, and liquid piping systems where extra-heavy schedule construction is required.

This nipple is suited for residential and commercial plumbing, HVAC hydronic piping, gas distribution, and industrial process lines where a short close or shoulder connection is needed between threaded fittings, valves, or equipment ports. The seamless construction and Schedule 80 wall rating make it appropriate for higher-pressure applications where standard Schedule 40 fittings are insufficient. It is commonly used in black iron gas lines and steam systems operating within the rated temperature range of -200 to 150 degrees F.

Key Features

• Seamless Schedule 80 construction rated to 1,900 psi working pressure
• 300 lb pressure class for use in demanding gas and liquid service
• 1-1/4-11-1/2 NPT thread form conforms to ANSI B1.20.1
• 0.191-inch wall thickness provides extra-heavy duty service life
• Black steel finish suitable for gas line and steam piping applications
• Temperature range of -200 to 150 degrees F

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1-1/4 inch NPT threaded black steel piping systems operating within Schedule 80 and 300 lb pressure class requirements.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes, IFGC, and ASME B31 piping standards. Shut off and bleed all system pressure before disassembling or threading any fitting into a live line. Apply an appropriate thread sealant or PTFE tape rated for the service medium before making up the joint. Do not over-torque the threaded connection, as this can crack fittings or distort threads.