3/4 inch x 5-1/2 inch Stainless Steel Nipple

3/4" x 5-1/2" Stainless Steel Pipe Nipple – Schedule 40, NPT x NPT

The 3/4" x 5-1/2" stainless steel pipe nipple is fabricated from Type 304 stainless steel and machined with NPT (National Pipe Taper) threads on both ends. This Schedule 40 nipple is used in corrosive or high-humidity environments where standard steel fittings are not suitable. It provides a rigid, pressure-rated connection for threaded pipe systems in potable water, compressed air, chemical handling, and general plumbing applications.

Type 304 stainless steel offers strong resistance to oxidation and various acids and chemicals, making this nipple suitable for both indoor and outdoor applications where corrosion resistance is essential. The fitting is compliant with ASTM A733 and ANSI B1.20.1 standards for pipe nipple and thread specifications.

Technical Specifications

• Nominal Pipe Size: 3/4"
• Length: 5-1/2"
• Material: 304 Stainless Steel (ASTM A312)
• Wall Thickness: Schedule 40
• Thread Type: NPT x NPT (Male National Pipe Thread)
• Operating Pressure: Dependent on system; suitable for standard Class 150 or higher when properly supported
• Temperature Rating: Up to 1500°F depending on media and pressure

Common Applications

Frequently used in:

• • Potable water systems (lead-free compliant)
• • Chemical process lines and washdown stations
• • Compressed air and non-hazardous gas systems
• • Food processing or sanitary equipment where corrosion resistance is required
• • Outdoor or exposed mechanical systems in corrosive environments

Installation Guidelines

Use PTFE tape or a compatible thread sealant on male threads before assembly. Avoid over-tightening to prevent thread deformation or failure. Ensure pipe alignment is within system tolerances and supports are correctly placed according to applicable plumbing or mechanical code. All stainless threads should be joined with care to prevent galling.

Material Note

Type 304 stainless steel is an austenitic alloy containing chromium and nickel, offering general corrosion resistance for use in a wide range of non-aggressive chemical and potable systems. For more aggressive chemical service or chloride environments, Type 316 stainless steel may be required.